A study on genetic diversity of reproductive characters in Elymus nutans germplasm resources

Abstract

Abstract: Genetic diversity of six reproductive characters was studied in 50 Elymus nutans populations collected from various regions of Gansu, Qinghai and Sichuan provinces in China. The characters included ear length, ear width, spikelet number per ear, seed length, awn length and thousand-seed weight. Shannon-Weaver index analysis showed that there was an abundant genetic diversity (H′=1.873) among populations. The genetic variation within populations (63.8%) was greater than that between populations ( 36.2%). Genetic variation was different for each character, that for ear width (CV=0.347 2) was the greatest while seed length (CV=0.118 4) was the smallest. The 50 populations were divided into three groups by cluster analysis. All reproductive characters were correlated to various extents with altitude, latitude, longitude, mean annual temperature and annual precipitation. Ear length and spikelet number per ear were highly significantly correlated with altitude and mean annual temperature (P<0.01). Plans for the utilization and protection of E. nutans are proposed.

CLC Number:

ZHANG Miao-qing, WANG Yan-rong, ZHANG Ji-yu, LIU Zhi-peng, ZHANG Lei, NIE Bin, ZHOU Jing. A study on genetic diversity of reproductive characters in Elymus nutans germplasm resources[J]. Acta Prataculturae Sinica, 2011, 20(3): 182-191.

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