Authors: Chen, Xiwen; Guo, Shaoying; Chen, Defu; Liu, Pin; Jia, Xiangdong; Sun, Lijun

Source: Genetic Resources and Crop Evolution, Volume 53, Number 8, December 2006 , pp. 1665-1673(9)

Publisher: Springer

Abstract:

To assess the genetic diversity among China's cultivated barley, sequence tagged site (STS) marker analysis was carried out to characterize 109 morphologically distinctive accessions originating from five Chinese eco-geographical zones. Fourteen polymorphic STS markers representing at least one in each chromosome were chosen for the analysis. The 14 STS markers revealed a total of 47 alleles, with an average of 3.36 alleles per locus (range 2-8). The proportion of polymorphic loci per population averaged 0.84 (range 0.71-1.00); the mean gene diversity averaged 0.39 (range 0.28-0.49). The means of P and H _e were highest in the Yangtze reaches and Southern zone (P = 1.00; H _e = 0.46) and lowest (P = 0.71 He = 0.28) in the Yellow river reaches zone. The STS diversity in different zones is quite different from the morphology diversity. The STS variation was partitioned into 17% among the zone and 83% within the zone. Both cluster and principal coordinate analyses clearly separated the accessions into a dispersed group (mostly two-rowed barley with a lower mean GS value) and a concentrated group (mostly six-rowed barley with a higher mean GS value) according to the spike characteristic with only a few exceptions. The accessions from the Qinghai-Tibet plateau formed a distinctive subgroup and can be distinguished from the concentrated group. The role of Tibet in the origin and evolution of cultivated barley has been discussed.

Keywords: Barley; Eco-geographical zone; Genetic diversity; Hordeum vulgare; STS analysis

Document Type: Research article

DOI: http://dx.doi.org/10.1007/s10722-005-1289-6

Affiliations: 1: Email: xiwenchen@nankai.edu.cn

Publication date: 2006-12-01

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• In this Subject: Plant Culture ,  Botany ,  Genetics
• By this author: Chen, Xiwen ;  Guo, Shaoying ;  Chen, Defu ;  Liu, Pin ;  Jia, Xiangdong ;  Sun, Lijun

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