首页|Genetic Diversity of the Two Commercial Tetraploid Cotton Species in the Gossypium Diversity Reference Set

Genetic Diversity of the Two Commercial Tetraploid Cotton Species in the Gossypium Diversity Reference Set

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  • NSTL
  • Oxford Univ Press
A diversity reference set has been constructed for the Gossypium accessions in the US National Cotton Germplasm Collection to facilitate more extensive evaluation and utilization of accessions held in the Collection. A set of 105 mapped simple sequence repeat markers was used to study the allelic diversity of 1933 tetraploid Gossypium accessions representative of the range of diversity of the improved and wild accessions of G. hirsutum and G. barbadense. The reference set contained 410 G. barbadense accessions and 1523 G. hirsutum accessions. Observed numbers of polymorphic and private bands indicated a greater diversity in G. hirsutum as compared to G. barbadense as well as in wild-type accessions as compared to improved accessions in both species. The markers clearly differentiated the 2 species. Patterns of diversity within species were observed but not clearly delineated, with much overlap occurring between races and regions of origin for wild accessions and between historical and geographic breeding pools for cultivated accessions. Although the percentage of accessions showing introgression was higher among wild accessions than cultivars in both species, the average level of introgression within individual accessions, as indicated by species-specific bands, was much higher in wild accessions of G. hirsutum than in wild accessions of G. barbadense. The average level of introgression within individual accessions was higher in improved G. barbadense cultivars than in G. hirsutum cultivars. This molecular characterization reveals the levels and distributions of genetic diversity that will allow for better exploration and utilization of cotton genetic resources.

germplasm collectionGossypium barbadenseGossypium hirsutumintrogressionpopulation structure

Hinze, Lori L.、Gazave, Elodie、Gore, Michael A.、Fang, David D.、Scheffler, Brian E.、Yu, John Z.、Jones, Don C.、Frelichowski, James、Percy, Richard G.

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ARS, USDA, Southern Plains Agr Res Ctr, Crop Germplasm Res Unit, College Stn, TX USA

Cornell Univ, Sch Integrat Plant Sci, Plant Breeding & Genet Sect, Ithaca, NY USA

ARS, USDA, So Reg Res Ctr, Cotton Fiber Biosci Res Unit, New Orleans, LA USA

ARS, USDA, Jamie Whitten Delta States Res Ctr, Genom & Bioinformat Res Unit, Stoneville, MS 38776

Cotton Inc, Cary, NC USA

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2016

10.1093/jhered/esw004

The Journal of Heredity

The Journal of Heredity

ISSN：0022-1503
年,卷(期)：2016.107(3)
  • 9
  • 46