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《Acta Agrestia Sinica》 2011-04
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Morphological Variations Analysis of Bromus catharticus Germplasm

HAO Feng1,2,XU Zhu1,YAN Wei-hong1,LI Ping1,LIU Ying3,HU Yan-cheng4(1.Grassland Research Institute,CAAS,Huhhot,Inner mongolia 010010,China;2.Graduate school of CAAS,Beijing 100018,China;3.Hetao Drainage Management Department,Linhe,Inner mongolia 015000,China;4.grassland workstations in chifeng city,Chifeng,Inner mongolia 024000,China)  
Morphology analysis is an easy and practical method to understand morphological variation and genetic relationship of materials.Phenotype analysis of 27 morphological traits shows that 17 Bromus tectorum Vahl.germplasm resources from different grassland ecology regions of China have significant genetic variations.Coefficient of variation was 9.13%~54.76%.There is broader variation in spikelet number,tiller number,spikelet number per branching,blade length,stalk diameter and branching length than other morphological traits among tested germplasm.There is less variation in spikelet joint number,rachilla internode length,spikelet length,lemma length,palea length,ligule length,palea breadth,anther length and lemma breadth among tested germplasm compared to other morphological traits.Blade breadth,branching length,blade length,stalk diameter,plant height,floret number per spikelet,floret number,spikelet breadth,anther length and lemma breadth were main factors of morphological variations.Cluster analysis indicates that 17 germplasm resources were classified into four groups according to the correlation of 27 morphological characters.These results not only reveal the genetic relationship of tested materials but also provide scientific basis for the further research of germplasm resources and breeding.
【Fund】: 中央级公益性科研院所基本科研业务费专项(中国农业科学院草原研究所)“八种优异禾草种质资源评价研究”(1610332011006);中央级公益性科研院所基本科研业务费专项(中国农业科学院草原研究所)“锡林郭勒典型草原生态生产功能区评价与适应性管理模式研究”(2010-Z-3);中央级公益性科研院所基本科研业务费专项(中国农业科学院草原研究所)“内蒙古太仆寺旗典型草原放牧管理优化模式研究”(1610332011019);; 中俄项目“优异作物基因资源收集、评价、利用与安全保存研究-中俄优异牧草遗传资源收集评价及其挖掘利用研究”(2008DFR30200)资助
【CateGory Index】: S543.8
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