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Rodriguez C, Fanara JJ, Hasson E. INVERSION POLYMORPHISM, LONGEVITY, AND BODY SIZE IN A NATURAL POPULATION OF DROSOPHILA BUZZATII. Evolution 2017; 53:612-620. [PMID: 28565408 DOI: 10.1111/j.1558-5646.1999.tb03796.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/1998] [Accepted: 12/14/1998] [Indexed: 11/30/2022]
Abstract
In this study we present the results of an analysis of differential longevity associated with Drosophila buzzatii second chromosome inversion karyotypes based on the assessment of more than 1000 individuals collected in a natural population. Comparisons of inversion frequencies between emerged and bait-collected flies showed not only that inversion arrangements were associated with differential longevity, but also that selection was sex specific. Because each individual fly was scored for thorax length and karyotype, we were able to show that longevity selection favoring larger flies coupled with the average effect of inversions on thorax length can account for the change of inversion frequencies due to longevity in females. The observed genotypic-by-sex interaction could be an important mechanism involved in the maintenance of the polymorphism. Arrangement 2Jz3 , which was shown to impaired fecundity in two independent previous studies, exhibited a positive effect on longevity. This pattern of negative pleiotropy may be another plausible mechanism accounting for the maintenance of the polymorphism.
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Affiliation(s)
| | - Juan J Fanara
- GIBE, Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria Pab. II, (1428), Buenos Aires, Argentina
| | - Esteban Hasson
- GIBE, Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria Pab. II, (1428), Buenos Aires, Argentina
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WERENKRAUT VICTORIA, HASSON ESTEBAN, OKLANDER LUCIANA, FANARA JUANJ. A comparative study of competitive ability between two cactophilic species in their natural hosts. AUSTRAL ECOL 2008. [DOI: 10.1111/j.1442-9993.2008.01833.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Soto IM, Carreira VP, Fanara JJ, Hasson E. Evolution of male genitalia: environmental and genetic factors affect genital morphology in two Drosophila sibling species and their hybrids. BMC Evol Biol 2007; 7:77. [PMID: 17504529 PMCID: PMC1878482 DOI: 10.1186/1471-2148-7-77] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2006] [Accepted: 05/15/2007] [Indexed: 11/18/2022] Open
Abstract
Background The rapid evolution of genital morphology is a fascinating feature that accompanies many speciation events. However, the underlying patterns and explanatory processes remain to be settled. In this work we investigate the patterns of intraspecific variation and interspecific divergence in male genitalic morphology (size and shape) in the cactophilic sibling species Drosophila buzzatii and D. koepferae. Genital morphology in interspecific hybrids was examined and compared to the corresponding parental lines. Results Despite of being siblings, D. buzzatii and D. koepferae showed contrasting patterns of genital morphological variation. Though genitalic size and shape variation have a significant genetic component in both species, shape varied across host cacti only in D. buzzatii. Such plastic expression of genital shape is the first evidence of the effect of rearing substrate on genitalic morphology in Drosophila. Hybrid genital morphology was not intermediate between parental species and the morphological resemblance to parental strains was cross-dependent. Conclusion Our results suggest the evolution of different developmental networks after interspecific divergence and the existence of a complex genetic architecture, involving genetic factors with major effects affecting genital morphology.
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Affiliation(s)
- Ignacio M Soto
- Departamento de Ecología, Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Valeria P Carreira
- Departamento de Ecología, Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Juan J Fanara
- Departamento de Ecología, Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Esteban Hasson
- Departamento de Ecología, Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
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Fanara JJ, Folguera G, Iriarte PF, Mensch J, Hasson E. Genotype by environment interactions in viability and developmental time in populations of cactophilic Drosophila. J Evol Biol 2006; 19:900-8. [PMID: 16674586 DOI: 10.1111/j.1420-9101.2006.01084.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The genetic and ecological basis of viability and developmental time differences between Drosophila buzzatii and D. koepferae were analysed using the isofemale line technique. Several isofemale lines were sampled from pairs of allopatric/sympatric populations of each species. Flies were reared in media prepared with decaying tissues of two of the main natural cactus hosts of each species. This experimental design enabled us to evaluate the relative contribution of phenotypic plasticity, genetic variation and genotype by environment interaction (G x E) to total phenotypic variation for two fitness traits, viability and developmental time. Our results revealed significant G x E in both traits, suggesting that the maintenance of genetic variation can be explained, at least in part, by diversifying selection in different patches of a heterogeneous environment in both species. However, the relative importance of the factors involved in the G x E varied between traits and populations within species. For viability, the G x E can be mainly attributed to changes in the rank order of lines across cacti. However, the pattern was different for developmental time. In D. buzzatii the G x E can be mainly accounted for by changes in among line variance across cacti, whereas changes in the rank order of lines across cacti was the main component in D. koepferae. These dissimilar patterns of variation between traits and species suggest that the evolutionary forces shaping genetic variation for developmental time and viability vary between populations within species and between species.
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Affiliation(s)
- J J Fanara
- Laboratorio de Evolución, Departamento de Ecología, Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria Pab. II, (1428) Buenos Aires, Argentina.
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Fanara JJ, Mensch J, Folguera G, Hasson E. Developmental Time and Thorax Length Differences Between the Cactophilic Species Drosophila Buzzatii and D. Koepferae Reared in Different Natural Hosts. Evol Ecol 2004. [DOI: 10.1023/b:evec.0000035043.32600.9d] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Fernández Iriarte PJ, Norry FM, Hasson ER. Chromosomal inversions effect body size and shape in different breeding resources in Drosophila buzzatii. Heredity (Edinb) 2003; 91:51-9. [PMID: 12815453 DOI: 10.1038/sj.hdy.6800280] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
The cactophilic Drosophila buzzatii provides an excellent model for the study of reaction norms across discrete environments because it breeds on rotting tissues (rots) of very different cactus species. Here we test the possible effects of second chromosome inversions on body size and shape (wing loading) across suitable natural breeding substrates. Using homokaryotypic stocks derived from several lines homozygous for four naturally occurring chromosomal inversions, we show that arrangements significantly affect size-related traits and wing loading. In addition, karyotypes show differing effects, across natural breeding resources, for wing loading. The 2st and 2jz(3) arrangements decrease and the 2j arrangement increases wing loading. For thorax length and wing loading, karyotypic correlations across host plants are slightly lower in females than in males. These results support the hypothesis that these traits have a genetic basis associated with the inversion polymorphism.
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Affiliation(s)
- P J Fernández Iriarte
- Laboratorio de Genética, Departamento de Biología, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, Funes 3250, 7600 Mar del Plata, Buenos Aires, Argentina.
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Frydenberg J, Pertoldi C, Dahlgaard J, Loeschcke V. Genetic variation in original and colonizing Drosophila buzzatii populations analysed by microsatellite loci isolated with a new PCR screening method. Mol Ecol 2002; 11:181-90. [PMID: 11856420 DOI: 10.1046/j.1365-294x.2002.01428.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
A new polymerase chain reaction-based screening method for microsatellites is presented. Using this method, we isolated 12 microsatellite loci from Drosophila buzzatii, two of which were X-linked. We applied the other 10 microsatellite loci to the analysis of genetic variation in five natural populations of D. buzzatii. Two populations were from the species' original distribution in Argentina, whereas the other three were from Europe (two) and Australia that were colonized 200 and 65 years ago, respectively. Allelic variation was much larger in the original populations than in the colonizing ones and there was a tendency to decreased heterozygosity in the colonizing populations. We used three different statistical procedures for detecting population bottlenecks. All procedures suggested that the low variability in the populations in the Old World was not the result of the recent population decline, but was due to a founder effect followed by a population expansion. In fact, one procedure which detects population expansions and declines based on the genealogical history of microsatellite data suggested that an expansion had taken place in all the colonized populations.
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Affiliation(s)
- J Frydenberg
- Department of Ecology and Genetics, University of Aarhus, Ny Munkegade, Bldg. 540, DK-8000 Aarhus C, The Netherlands.
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Fanara JJ, Hasson E. Oviposition acceptance and fecundity schedule in the cactophilic sibling species Drosophila buzzatii and D. koepferae on their natural hosts. Evolution 2001; 55:2615-9. [PMID: 11831675 DOI: 10.1111/j.0014-3820.2001.tb00774.x] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
We tested for the occurrence of oviposition acceptance for different media prepared with cactus tissues of three alternative cactus hosts: Opuntia sulphurea, O. quimilo and Trichocereus terschekii for 4 consecutive days in lines of two Drosophila buzzatii populations and one population of D. koepferae. Our results showed that the former laid significantly more eggs on both Opuntia cacti than on T. terschekii, whereas D. koepferae preferred T. terschekii. In addition, fecundity schedules differed between species: D. buzzatii laid similar numbers of eggs along the four-day sampling period, whereas D. koepferae showed an oviposition peak on the second day of egg collection on T. terschekii. We suggest that the between-species disparities observed in oviposition acceptance and fecundity schedule may be related to the temporal and spatial predictability of Opuntia versus T. terschekii (cardón) as part of the different adaptive strategies that have evolved after the split of D. koepferae and D. buzzatii from their recent common ancestor. Therefore, the willingness to accept hosts would be an important factor in the habitat selection and in the maintenance of species diversity.
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Affiliation(s)
- J J Fanara
- Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Argentina.
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Fanara JJ, Hasson E. OVIPOSITION ACCEPTANCE AND FECUNDITY SCHEDULE IN THE CACTOPHILIC SIBLING SPECIES DROSOPHILA BUZZATII AND D. KOEPFERAE ON THEIR NATURAL HOSTS. Evolution 2001. [DOI: 10.1554/0014-3820(2001)055[2615:oaafsi]2.0.co;2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Rodriguez C, Piccinali R, Levy E, Hasson E. Contrasting population genetic structures using allozymes and the inversion polymorphism in Drosophila buzzatii. J Evol Biol 2000. [DOI: 10.1046/j.1420-9101.2000.00236.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Iriarte PF, Hasson E. THE ROLE OF THE USE OF DIFFERENT HOST PLANTS IN THE MAINTENANCE OF THE INVERSION POLYMORPHISM IN THE CACTOPHILIC DROSOPHILA BUZZATII. Evolution 2000. [DOI: 10.1111/j.0014-3820.2000.tb00562.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Fernández Iriarte P, Hasson E. The role of the use of different host plants in the maintenance of the inversion polymorphism in the cactophilic Drosophila buzzatii. Evolution 2000; 54:1295-302. [PMID: 11005296 DOI: 10.1554/0014-3820(2000)054[1295:trotuo]2.0.co;2] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Inversion polymorphisms often have been associated with fitness variation. Cactophilic Drosophila buzzatii has been used widely for the study of the maintenance of chromosomal variation. The purpose of this paper is to address the relative importance of variable selection regimes associated with the use of three different host cacti and antagonistic pleiotropy in the maintenance of chromosomal variation. Using homokaryotypic stocks derived from several lines homozygous for four second-chromosome arrangements, we show that inversions significantly affect first-instar larva to adult viability (VT), developmental time (DT) and adult thorax length (TL). We also show that the effects of inversions on DT and VT are dependent on the cactus rearing media. The effects of polymorphic gene arrangements on life-history traits suggest the existence of trade-offs between early and late fitness components. The dosage of arrangement 2st, the ancestral gene order, was negatively correlated with DT and TL, whereas flies carrying the derived arrangements 2j and 2jq7 had longer DTs and larger TLs. Arrangements 2st and 2jq7 increased viability, at least in one of the cactus media tested. Our results suggest that environmental heterogeneity, as represented by the use of different cactus hosts and the trade-off between DT and TL, may be involved in the maintenance of the polymorphism. In addition, our data suggest that the chromosomal phylogeny may be decoupled from the evolution of the genes affecting life-history traits linked to the inversion system.
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Affiliation(s)
- P Fernández Iriarte
- GIBE, Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Argentina
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Fanara JJ, Hasson E, Rodríguez C. The effect of polymorphic inversions on body size in two natural populations of Drosophila buzzatii from Argentina. Hereditas 1997; 126:233-7. [PMID: 9350138 DOI: 10.1111/j.1601-5223.1997.00233.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Previous works in a colonized and an original population of Drosophila buzzatii have shown a consistent relationship between the inversion polymorphism and thorax length, a measure of body size. However, the populations studied in those reports share a close genealogical relationship as suggested by several lines of evidence. In the present paper, we revisit this issue by analysing the correlation between second chromosome arrangements and thorax length in two Argentinian natural populations (Termas de Río Hondo and Arroyo Escobar) from different biogeographic areas with different host plants. Our findings are: (1) inversion frequencies were significantly different between populations; (2) the mean thorax length of flies collected in both populations was not significantly different; and (3) we obtain confirming evidence that flies carrying 2st, the ancestral gene order, have on average a smaller body size than those carrying the derived arrangements (2j and 2jz3). These results suggest that the biometrical effect of inversions on body size previously described are due to genetic differences between arrangements and not to the close historical relationship between the populations studied in previous reports.
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Affiliation(s)
- J J Fanara
- GIBE, Departmento de Ciencias Biológicas, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Argentina.
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