1
|
Vetch JM, Tillett BJ, Bruckner P, Martin JM, Marlowe K, Hooker MA, See DR, Giroux MJ. TAMFT-3A and TAMFT-3B2 homeologs are associated with wheat preharvest sprouting. Plant Genome 2022; 15:e20250. [PMID: 35971881 DOI: 10.1002/tpg2.20250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Accepted: 06/20/2022] [Indexed: 06/15/2023]
Abstract
The phenomenon of preharvest sprouting (PHS), caused by rain after physiological maturity and prior to harvest, negatively affects wheat (Triticum aestivum L.) production and end use. Investigating the genetics that control PHS resistance may result in increased control of seed dormancy. Multiple genes involved in the development of seed dormancy are associated with PHS. In this study, the TaMFT (3A, 3B1, 3B2, 3D), TaMKK3-4A, and TaVP1-3B genes were assessed for association with PHS in a double-haploid line (DHL) hard red winter wheat population derived from a BC1 cross between the cultivars Loma and Warhorse, where Loma was the recurrent and PHS susceptible parent. The 162 BC1 DHL lines were grown over two field seasons and PHS susceptibility was assessed by measuring PHS resistance in physiologically mature heads. The PHS variation was associated with the TaMFT-A and the B2 homeolog with Loma carrying mutant forms of each gene. No sequence variation between Loma and Warhorse was detected in the exons of the TaMFT-B1 and D homeologs. No association between PHS resistance and TaMKK3-4A or TaVp1-3B variation was observed, though Loma and Warhorse vary for TaMKK3-4A and TaVp1-3B mutations reported to be PHS associated. Previous research has shown TaMFT-3A as having a large impact on PHS resistance. In the current study, the TaMFT-3A and TaMFT-3B2 alleles each explained 14% of observed PHS variation. Markers for both TaMFT-3A and TaMFT-3B2 should be used in selecting for increased wheat dormancy and PHS resistance.
Collapse
Affiliation(s)
- Justin Michael Vetch
- Dep. of Plant Sciences and Plant Pathology, Montana State Univ., 119 Plant Biosciences, Bozeman, MT, 59717-3150, USA
- Current address: Dep. of Research Centers, Montana State Univ., Conrad, MT, 59425, USA
| | - Brandon J Tillett
- Dep. of Plant Sciences and Plant Pathology, Montana State Univ., 119 Plant Biosciences, Bozeman, MT, 59717-3150, USA
| | - Philip Bruckner
- Dep. of Plant Sciences and Plant Pathology, Montana State Univ., 119 Plant Biosciences, Bozeman, MT, 59717-3150, USA
| | - John M Martin
- Dep. of Plant Sciences and Plant Pathology, Montana State Univ., 119 Plant Biosciences, Bozeman, MT, 59717-3150, USA
| | - Karol Marlowe
- Current address: Dep. of Research Centers, Montana State Univ., Conrad, MT, 59425, USA
| | | | - Deven Robert See
- Crop and Soil Sciences, Washington State Univ. College of Agricultural Human and Natural Resource Sciences, 291B, Johnson Hall, Pullman, WA, 99164, USA
- USDA-ARS Wheat Health, Genetics and Quality Research Unit, Pullman, WA, 99164, USA
| | - Michael J Giroux
- Dep. of Plant Sciences and Plant Pathology, Montana State Univ., 119 Plant Biosciences, Bozeman, MT, 59717-3150, USA
| |
Collapse
|
2
|
Tillett BJ, Hale CO, Martin JM, Giroux MJ. Genes Impacting Grain Weight and Number in Wheat ( Triticum aestivum L. ssp. aestivum). Plants (Basel) 2022; 11:plants11131772. [PMID: 35807724 PMCID: PMC9269389 DOI: 10.3390/plants11131772] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Revised: 06/17/2022] [Accepted: 06/27/2022] [Indexed: 05/05/2023]
Abstract
The primary goal of common wheat (T. aestivum) breeding is increasing yield without negatively impacting the agronomic traits or product quality. Genetic approaches to improve the yield increasingly target genes that impact the grain weight and number. An energetic trade-off exists between the grain weight and grain number, the result of which is that most genes that increase the grain weight also decrease the grain number. QTL associated with grain weight and number have been identified throughout the hexaploid wheat genome, leading to the discovery of numerous genes that impact these traits. Genes that have been shown to impact these traits will be discussed in this review, including TaGNI, TaGW2, TaCKX6, TaGS5, TaDA1, WAPO1, and TaRht1. As more genes impacting the grain weight and number are characterized, the opportunity is increasingly available to improve common wheat agronomic yield by stacking the beneficial alleles. This review provides a synopsis of the genes that impact grain weight and number, and the most beneficial alleles of those genes with respect to increasing the yield in dryland and irrigated conditions. It also provides insight into some of the genetic mechanisms underpinning the trade-off between grain weight and number and their relationship to the source-to-sink pathway. These mechanisms include the plant size, the water soluble carbohydrate levels in plant tissue, the size and number of pericarp cells, the cytokinin and expansin levels in developing reproductive tissue, floral architecture and floral fertility.
Collapse
|
4
|
Field IC, Tillett BJ, Charters R, Johnson GJ, Buckworth RC, Meekan MG, Bradshaw CJA. Distribution, relative abundance and risks from fisheries to threatened Glyphis sharks and sawfishes in northern Australia. ENDANGER SPECIES RES 2013. [DOI: 10.3354/esr00513] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
|
5
|
Abstract
Reproductive philopatry in bull sharks Carcharhinus leucas was investigated by comparing mitochondrial (NADH dehydrogenase subunit 4, 797 base pairs and control region genes 837 base pairs) and nuclear (three microsatellite loci) DNA of juveniles sampled from 13 river systems across northern Australia. High mitochondrial and low microsatellite genetic diversity among juveniles sampled from different rivers (mitochondrial φ(ST) = 0·0767, P < 0·05; microsatellite F(ST) = -0·0022, P > 0·05) supported female reproductive philopatry. Genetic structure was not further influenced by geographic distance (P > 0·05) or long-shore barriers to movement (P > 0·05). Additionally, results suggest that C. leucas in northern Australia has a long-term effective population size of 11 000-13 000 females and has undergone population bottlenecks and expansions that coincide with the timing of the last ice-ages.
Collapse
Affiliation(s)
- B J Tillett
- Research Institute for the Environment and Livelihoods, Charles Darwin University, Darwin, NT 0810, Australia.
| | | | | | | | | |
Collapse
|
6
|
Dudgeon CL, Blower DC, Broderick D, Giles JL, Holmes BJ, Kashiwagi T, Krück NC, Morgan JAT, Tillett BJ, Ovenden JR. A review of the application of molecular genetics for fisheries management and conservation of sharks and rays. J Fish Biol 2012; 80:1789-1843. [PMID: 22497408 DOI: 10.1111/j.1095-8649.2012.03265.x] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Since the first investigation 25 years ago, the application of genetic tools to address ecological and evolutionary questions in elasmobranch studies has greatly expanded. Major developments in genetic theory as well as in the availability, cost effectiveness and resolution of genetic markers were instrumental for particularly rapid progress over the last 10 years. Genetic studies of elasmobranchs are of direct importance and have application to fisheries management and conservation issues such as the definition of management units and identification of species from fins. In the future, increased application of the most recent and emerging technologies will enable accelerated genetic data production and the development of new markers at reduced costs, paving the way for a paradigm shift from gene to genome-scale research, and more focus on adaptive rather than just neutral variation. Current literature is reviewed in six fields of elasmobranch molecular genetics relevant to fisheries and conservation management (species identification, phylogeography, philopatry, genetic effective population size, molecular evolutionary rate and emerging methods). Where possible, examples from the Indo-Pacific region, which has been underrepresented in previous reviews, are emphasized within a global perspective.
Collapse
Affiliation(s)
- C L Dudgeon
- The University of Queensland, St Lucia, Brisbane, Queensland 4072, Australia.
| | | | | | | | | | | | | | | | | | | |
Collapse
|