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Singh A, Raina SN, Rajpal VR, Singh AK. Seed protein fraction electrophoresis in peanut ( Arachis hypogaea L.) accessions and wild species. PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS : AN INTERNATIONAL JOURNAL OF FUNCTIONAL PLANT BIOLOGY 2018; 24:465-481. [PMID: 29692554 PMCID: PMC5911266 DOI: 10.1007/s12298-018-0521-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Revised: 01/12/2018] [Accepted: 02/14/2018] [Indexed: 06/08/2023]
Abstract
Total seed storage proteins were studied in 50 accessions of A. hypogaea (11 A. hypogaea ssp. hypogaea var hypogaea, 13 A. hypogaea ssp. hypogaea var hirsuta, 11 A. hypogaea ssp. fastigiata var fastigiata and 15 A. hypogaea ssp. fastigiata var. vulgaris accessions) in SDS PAGE. These accessions were also analysed for albumin and globulin seed protein fractions. Among the six seed protein markers presently used, it was found that globulin fraction showed maximum diversity (77.2%) in A. hypogaea accessions followed by albumin (52.3%), denatured total soluble protein fraction in embryo (33.3%) and cotyledon (28.5%). The cluster analysis based on combined data of cotyledons, embryos, albumins and globulins seed protein fractions demarcated the accessions of two subspecies hypogaea and fastigiata into two separate clusters supported by 51% bootstrap value, with few exceptions, suggesting the genotypes to be moderately diverse. Native and denatured total soluble seed storage proteins were also electrophoretically analysed in 27 wild Arachis species belonging to six sections of the genus. Cluster analysis using different methods were performed for different seed proteins data alone and also in combination. Section Caulorrhizae (C genome) and Triseminatae (T genome) formed one, distantly related group to A. hypogaea and other section Arachis species in the dendrogram based on denatured seed storage proteins data. The present analysis has maintained that the section Arachis species belong to primary and secondary genepools and, sections Procumbenetes and Erectoides belong to tertiary gene pools.
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Affiliation(s)
- Apekshita Singh
- Amity Institute of Biotechnology, Amity University Uttar Pradesh, Sector-125, Noida, Uttar Pradesh 201313 India
| | - Soom Nath Raina
- Amity Institute of Biotechnology, Amity University Uttar Pradesh, Sector-125, Noida, Uttar Pradesh 201313 India
| | - Vijay Rani Rajpal
- Department of Botany, Hans Raj College, University of Delhi, Delhi, 110007 India
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Stalker HT, Tallury SP, Ozias-Akins P, Bertioli D, Bertioli SCL. The Value of Diploid Peanut Relatives for Breeding and Genomics. ACTA ACUST UNITED AC 2013. [DOI: 10.3146/ps13-6.1] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
ABSTRACT
Collection, evaluation, and introgression research has been conducted with Arachis species for more than 60 years. Eighty species in the genus have been described and additional species will be named in the future. Extremely high levels of disease and insect resistances to immunity have been observed in many species of the genus as compared to the cultivated peanut, which makes them extremely important for crop improvement. Many thousands of interspecific hybrids have been produced in the genus, but introgression has been slow because of genomic incompatibilities and sterility of hybrids. Genomics research was initiated during the late 1980s to characterize species relationships and investigate more efficient methods to introgress genes from wild species to A. hypogaea. Relatively low density genetic maps have been created from inter- and intra-specific crosses, several of which have placed disease resistance genes into limited linkage groups. Of particular interest is associating molecular markers with traits of interest to enhance breeding for disease and insect resistances. Only recently have sufficiently large numbers of markers become available to effectively conduct marker assisted breeding in peanut. Future analyses of the diploid ancestors of the cultivated peanut, A. duranensis and A. ipaensis, will allow more detailed characterization of peanut genetics and the effects of Arachis species alleles on agronomic traits. Extensive efforts are being made to create populations for genomic analyses of peanut, and introgression of genes from wild to cultivated genotypes should become more efficient in the near future.
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Affiliation(s)
- H. T. Stalker
- Department of Crop Science, North Carolina State University, Raleigh, NC 27695
| | - S. P. Tallury
- Department of Crop Science, North Carolina State University, Raleigh, NC 27695
| | - P. Ozias-Akins
- Department of Horticulture, The University of Georgia, Tifton, GA, 31973
| | - D. Bertioli
- Department of Gentics and Morphology, University of Brasilia, Campus Darcy Ribeiro, Brasília, DF. Brazil
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Moretzsohn MC, Gouvea EG, Inglis PW, Leal-Bertioli SCM, Valls JFM, Bertioli DJ. A study of the relationships of cultivated peanut (Arachis hypogaea) and its most closely related wild species using intron sequences and microsatellite markers. ANNALS OF BOTANY 2013; 111:113-26. [PMID: 23131301 PMCID: PMC3523650 DOI: 10.1093/aob/mcs237] [Citation(s) in RCA: 93] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2012] [Accepted: 10/02/2012] [Indexed: 05/19/2023]
Abstract
BACKGROUND AND AIMS The genus Arachis contains 80 described species. Section Arachis is of particular interest because it includes cultivated peanut, an allotetraploid, and closely related wild species, most of which are diploids. This study aimed to analyse the genetic relationships of multiple accessions of section Arachis species using two complementary methods. Microsatellites allowed the analysis of inter- and intraspecific variability. Intron sequences from single-copy genes allowed phylogenetic analysis including the separation of the allotetraploid genome components. METHODS Intron sequences and microsatellite markers were used to reconstruct phylogenetic relationships in section Arachis through maximum parsimony and genetic distance analyses. KEY RESULTS Although high intraspecific variability was evident, there was good support for most species. However, some problems were revealed, notably a probable polyphyletic origin for A. kuhlmannii. The validity of the genome groups was well supported. The F, K and D genomes grouped close to the A genome group. The 2n = 18 species grouped closer to the B genome group. The phylogenetic tree based on the intron data strongly indicated that A. duranensis and A. ipaënsis are the ancestors of A. hypogaea and A. monticola. Intron nucleotide substitutions allowed the ages of divergences of the main genome groups to be estimated at a relatively recent 2·3-2·9 million years ago. This age and the number of species described indicate a much higher speciation rate for section Arachis than for legumes in general. CONCLUSIONS The analyses revealed relationships between the species and genome groups and showed a generally high level of intraspecific genetic diversity. The improved knowledge of species relationships should facilitate the utilization of wild species for peanut improvement. The estimates of speciation rates in section Arachis are high, but not unprecedented. We suggest these high rates may be linked to the peculiar reproductive biology of Arachis.
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Affiliation(s)
- Márcio C Moretzsohn
- Embrapa Recursos Genéticos e Biotecnologia, C.P. 02372, CEP 70·770-917, Brasília, DF, Brazil.
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Stalker HT, Dhesi JS, Kochert G. Genetic diversity within the species Arachis duranensis Krapov. &W.C. Gregory, a possible progenitor of cultivated peanut. Genome 2012; 38:1201-12. [PMID: 18470240 DOI: 10.1139/g95-158] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Eighteen accessions of a diploid wild peanut species (Arachis duranensis) were analyzed using morphological, intercrossing, cytological, and RFLP data. Abundant variation was found for morphological characters and for RFLP patterns both between and within accessions, and each accession could be uniquely identified by RFLP pattern. Several plants were found to be F1 hybrids between different accessions, indicating that intercrossing had occurred when these were planted for seed increase. Patterns of RFLP diversity were found to correspond with geographic distribution. Analysis of the number of RFLP fragments observed per accession indicates that additional field collections of this complex of taxa will yield additional genetic variability.
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Stalker HT, Weissinger AK, Milla-Lewis S, Holbrook CC. Genomics: An Evolving Science in Peanut. ACTA ACUST UNITED AC 2009. [DOI: 10.3146/at07-006.1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Abstract
Genomic spcience offers new research tools to explore the function of genes and their effects on plants and animals. Arachis hypogaea is a polyploid species of relatively recent origin and molecular analyses with technologies available in the 1980s and 1990s resulted in little progress in the cultivated species because of apparent lack of molecular variation. Large numbers of polymorphisms existing in wild Arachis species led to evolutionary and gene introgression studies. High throughput genomic sequencing technologies have greatly expanded the possibilities for investigating gene function, but techniques are sufficiently expensive that most federal funding has been directed toward model species and ‘major’ crops. Peanut has lagged behind many other crops, but the number of researchers working on the species in the U.S. and internationally has greatly increased during recent years. In an effort to bring researchers who work with a number of legume crops together to discuss common goals, a national strategic planning workshop was held in 2001 which led to the U.S. Legume Crops Genomics Initiative. A second workshop was held in 2004 to develop a plan with specific objectives for cross-legume genomics research and to outline milestones for accomplishments. Specifically for peanut, a genomics strategic planning workshop was organized at Atlanta in 2004 by the American Peanut Council. A broad view of genomic science was adopted and goals were set by participants to include (a) improving the utility of genetic tools for peanut genomics research, (b) improving the efficacy of technology for gene manipulation in genomics, (c) developing a framework for assembling the peanut genetic blueprint, (d) improving knowledge of gene identification and regulation, and (e) providing bioinformatic management of peanut biological information. Teams of researchers, including molecular biologists, plant breeders, pathologists, and many other disciplines need to be developed to fully utilize the potential of genomics for peanut improvement.
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Yunuskhanov SY, Ataev DY, Kurbanbaev IZ. Species-specific features of the protein patterns of diploid cotton seeds with A and D genomes and of some amphidiploids. RUSS J GENET+ 2007. [DOI: 10.1134/s1022795407040084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Liang XQ, Luo M, Holbrook CC, Guo BZ. Storage protein profiles in Spanish and runner market type peanuts and potential markers. BMC PLANT BIOLOGY 2006; 6:24. [PMID: 17038167 PMCID: PMC1621064 DOI: 10.1186/1471-2229-6-24] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2006] [Accepted: 10/12/2006] [Indexed: 05/08/2023]
Abstract
BACKGROUND Proteomic analysis has proven to be the most powerful method for describing plant species and lines, and for identification of proteins in complex mixtures. The strength of this method resides in high resolving power of two-dimensional electrophoresis (2-DE), coupled with highly sensitive mass spectrometry (MS), and sequence homology search. By using this method, we might find polymorphic markers to differentiate peanut subspecies. RESULTS Total proteins extracted from seeds of 12 different genotypes of cultivated peanut (Arachis hypogaea L.), comprised of runner market (A. hypogaea ssp. hypogaea) and Spanish-bunch market type (A. hypogaea ssp. fastigiata), were separated by electrophoresis on both one- and two-dimensional SDS-PAGE gels. The protein profiles were similar on one-dimensional gels for all tested peanut genotypes. However, peanut genotype A13 lacked one major band with a molecular weight of about 35 kDa. There was one minor band with a molecular weight of 27 kDa that was present in all runner peanut genotypes and the Spanish-derivatives (GT-YY7, GT-YY20, and GT-YY79). The Spanish-derivatives have a runner-type peanut in their pedigrees. The 35 kDa protein in A13 and the 27 kDa protein in runner-type peanut genotypes were confirmed on the 2-D SDS-PAGE gels. Among more than 150 main protein spots on the 2-D gels, four protein spots that were individually marked as spots 1-4 showed polymorphic patterns between runner-type and Spanish-bunch peanuts. Spot 1 (ca. 22.5 kDa, pI 3.9) and spot 2 (ca. 23.5 kDa, pI 5.7) were observed in all Spanish-bunch genotypes, but were not found in runner types. In contrast, spot 3 (ca. 23 kDa, pI 6.6) and spot 4 (ca. 22 kDa, pI 6.8) were present in all runner peanut genotypes but not in Spanish-bunch genotypes. These four protein spots were sequenced. Based on the internal and N-terminal amino acid sequences, these proteins are isoforms (iso-Ara h3) of each other, are iso-allergens and may be modified by post-translational cleavage. CONCLUSION These results suggest that there may be an association between these polymorphic storage protein isoforms and peanut subspecies fastigiata (Spanish type) and hypogaea (runner type). The polymorphic protein peptides distinguished by 2-D PAGE could be used as markers for identification of runner and Spanish peanuts.
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Affiliation(s)
- XQ Liang
- USDA-ARS, Crop Protection and Management Research Unit, Tifton, GA, USA
- Guangdong Academy of Agricultural Sciences, Institute of Crop Sciences, Guangzhou, China
| | - M Luo
- USDA-ARS, Crop Protection and Management Research Unit, Tifton, GA, USA
- University of Georgia, Department of Crop and Soil Sciences, Tifton, GA, USA
| | - CC Holbrook
- USDA-ARS, Crop Genetics and Breeding Research Unit, Tifton, GA, USA
| | - BZ Guo
- USDA-ARS, Crop Protection and Management Research Unit, Tifton, GA, USA
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Tallury SP, Hilu KW, Milla SR, Friend SA, Alsaghir M, Stalker HT, Quandt D. Genomic affinities in Arachis section Arachis (Fabaceae): molecular and cytogenetic evidence. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2005; 111:1229-37. [PMID: 16187123 DOI: 10.1007/s00122-005-0017-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2005] [Accepted: 06/14/2005] [Indexed: 05/04/2023]
Abstract
Section Arachis is the largest of nine sections in the genus Arachis and includes domesticated peanut, A. hypogaea L. Most species are diploids (x = 10) with two tetraploids and a few aneuploids. Three genome types have been recognized in this section (A, B and D), but the genomes are not well characterized and relationships of several newly described species are uncertain. To clarify genomic relationships in section Arachis, cytogenetic information and molecular data from amplified fragment length polymorphism (AFLP) and the trnT-F plastid region were used to provide an additional insight into genome composition and species relationships. Cytogenetic information supports earlier observations on genome types of A. cruziana, A. herzogii, A. kempff-mercadoi and A. kuhlmannii but was inconclusive about the genome composition of A. benensis, A. hoehnei, A. ipaensis, A. palustris, A. praecox and A. williamsii. An AFLP dendrogram resolved species into four major clusters and showed A. hypogaea grouping closely with A. ipaensis and A. williamsii. Sequence data of the trnT-F region provided genome-specific information and showed for the first time that the B and D genomes are more closely related to each other than to the A genome. Integration of information from cytogenetics and biparentally and maternally inherited genomic regions show promise in understanding genome types and relationships in Arachis.
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Affiliation(s)
- S P Tallury
- Department of Crop Science, North Carolina State University, Raleigh, NC 27695-7629, USA.
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Affiliation(s)
| | | | - Jose F.M. Valls
- Embrapa Recursos Genéticos e Biotecnologia (CENARGEN), Brazil
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Raina SN, Rani V, Kojima T, Ogihara Y, Singh KP, Devarumath RM. RAPD and ISSR fingerprints as useful genetic markers for analysis of genetic diversity, varietal identification, and phylogenetic relationships in peanut (Arachis hypogaea) cultivars and wild species. Genome 2001. [DOI: 10.1139/g01-064] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Twenty-one random and 29 SSR primers were used to assess genetic variation and interrelationships among subspecies and botanical varieties of cultivated peanut, Arachis hypogaea (2n = 4x = 40), and phylogenetic relationships among cultivated peanut and wild species of the genus Arachis. In contrast with the previous generalization that peanut accessions lack genetic variation, both random and SSR primers revealed 42.7 and 54.4% polymorphism, respectively, among 220 and 124 genetic loci amplified from 13 accessions. Moreover, the dendrograms based on RAPD, ISSR, and RAPD + ISSR data precisely organized the five botanical varieties of the two subspecies into five clusters. One SSR primer was identified that could distinguish all the accessions analysed within a variety. Although the polymorphic index content varied from 0.1 to 0.5 for both ISSR and RAPD markers, primer index values were substantially higher for RAPD primers (0.354.65) than for SSR primers (0.351.73). It was possible to identify accessions, particularly those of divergent origins, by RAPD and (or) ISSR fingerprints. Based on these results, marker-based genetic improvement in A. hypogaea appears possible. None of the 486 RAPD and 330 ISSR amplification products were found to be commonly shared among 13 species of section Arachis and one species each of sections Heteranthae, Rhizomatosae, and Procumbentes. Dendrograms constructed from RAPD, ISSR, and RAPD + ISSR data showed overall similar topologies. They could be resolved into four groups corresponding to the species grouped in four taxonomic sections. The present results strongly support the view that Arachis monticola (2n = 4x = 40) and A. hypogaea are very closely related, and indicate that A. villosa and A. ipaensis are the diploid wild progenitors of these tetraploid species.Key words: Arachis hypogaea, genetic markers, varietal identification, DNA polymorphism, Arachis species.
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Singh KP, Raina SN, Singh AK. Variation in chromosomal DNA associated with the evolution of Arachis species. Genome 1996; 39:890-7. [DOI: 10.1139/g96-112] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The 2C nuclear DNA amounts were determined for 99 accessions, representing 23 Arachis species from 8 of 9 taxonomic sections, and two synthetic amphidiploids. Mean 2C DNA amounts varied by 15.20%, ranging from 10.26 to 11.82 pg, between accessions of Arachis hypogaea (2n = 4x = 40). Nuclear DNA content variation (5.33–5.91 pg) was also detected among Arachis duranensis (2n = 2x = 20) accessions. The intraspecific variation in the two species may have resulted from indirect selection for favourable genome sizes in particular environmental conditions. The accessions belonging to A. hypogaea ssp. hypogaea (mean value 11.27 pg) with longer life cycle had significantly larger mean DNA content than the accessions of A. hypogaea ssp. fastigiata (mean value 10.97 pg). For 20 diploid (2n = 2x = 20) species of the genus, 2C nuclear DNA amounts ranged from approximately 3 to 7 pg. The diploid perennial species of section Arachis have about 12% more DNA than the annual species. Comparisons of DNA amounts show that evolutionary rating is not a reliable guide to DNA amounts in generic sections of the genus; lower DNA values with evolutionary advancement were found in sections Heteranthae and Triseminatae, but the same was not true for sections Arachis and Caulorrhizae. Similarly, there is evidence of significant differences in DNA content between 4 ancient sections (Procumbentes, Erectoides, Rhizomatosae, and Extranervosae) of the genus. The occurrence of genome size plasticity in both A. duranensis and A. hypogaea provides evidence that A. duranensis could be one of the diploid progenitors of A. hypogaea. The DNA content in the two synthetic amphidiploids corresponded to the sum value estimated for parental species. Key words : Arachis species, genome size, Arachis hypogaea, Arachis duranensis, intraspecific variation.
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van den Berg BM, Gabillard D. Isoelectric focusing in immobilized pH gradient of melon (Cucumis melo L.) seed protein: methodical and genetic aspects, and application in breeding. Electrophoresis 1994; 15:1541-51. [PMID: 7720692 DOI: 10.1002/elps.11501501222] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Genetic variability of melon seed proteins was studied by separation of seed protein by isoelectric focusing in immobilized pH gradient (IEF-IPG) under denaturing conditions. A routine procedure was developed for IEF-IPG of hundreds of individual melon seeds per day. A group of 74 accessions from 19 morphologically distinct groups and from different geographic origin were studied by IEF-IPG using pH gradients of 4-10, 4-7 and 6-10. The electrophoretic analysis of the 74 accessions showed 270 reproducible seed protein bands of which 70 were variable. Genetic evaluation led to the conclusion that at least 20 loci govern the variation found. The phylogenetic trees constructed using the protein data on one hand and the morphological data on the other hand were compared and their use was evaluated. A number of commercial Cantaloup F1 hybrid descendants derived from the F1 hybrids by diplohaploidization or single plot descent were studied by IEF-IPG using pH gradients of 4-7 and 6-10. Among the F1 hybrids and their descendants 265 reproducible protein bands could be identified of which 72 were variable as to presence versus absence. The genetic interpretation of the protein pattern as found by IEF-IPG and the use of IEF-IPG in plant breeding was discussed. It was concluded that IEP-IPG of melon seed proteins is a valuable tool in breeding.
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Lu J, Pickersgill B. Isozyme variation and species relationships in peanut and its wild relatives (Arachis L. - Leguminosae). TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 1993; 85:550-60. [PMID: 24195929 DOI: 10.1007/bf00220913] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/1992] [Accepted: 10/07/1992] [Indexed: 05/12/2023]
Abstract
Arachis hypogaea (peanut or groundnut) is an AABB allotetraploid whose precise ancestry is not yet clear. Its closest diploid relatives are the annual and perennial wild species included with it in the section Arachis. Variation in these species for 11 different enzymes was studied by starch-gel electrophoresis. Differences attributed to at least 13 genetic loci were found among eight enzymes, while three enzymes appeared uniform throughout the section. Values for Nei's genetic distance were calculated for all pairs of species and were used to estimate relationships. All diploid species, apart from two whose validity had previously been questioned, could be distinguished by their overall zymotypes, but few contained unique alleles. When species were grouped by their mean genetic distances, they formed two clusters, which agreed reasonably well with the division of the section into annual versus perennial species. The single B-genome species was an outlier within the annual group. A. hypogaea showed fixed heterozygosity at four loci (in ssp. hypogaea) or six loci (in ssp. fastigiata), which agrees with previous conclusions that the peanut is an allotetraploid. None of the diploids included in this survey could be conclusively identified as donors of either the A or the B genome to the tetraploids. The two subspecies of A. hypogaea differed consistently in two of the thirteen putative loci studied. This may call into question the simple hypothesis that A. hypogaea originated from just two diploid species.
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Affiliation(s)
- J Lu
- Department of Agricultural Botany, School of Plant Sciences, University of Reading, RG6 2AS, Reading, UK
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