高寒山区扁穗雀麦单株性状与种子产量的通径分析初报  

Preliminary study on path coefficient between growth traits and seed yield of Bromus cartharticus in alpine mountains

作　　者：杨世忠 敖学成 王同军 

机构地区：[1]凉山州畜牧兽医科研所,四川西昌615042

出　　处：《草业科学》2010年第7期172-176,共5页Pratacultural Science

摘　　要：通过对高寒山区自然演替的逸生种扁穗雀麦(Bromus cartharticus)单株性状与种子产量的相关通径分析发现,多元决定系数∑d=0.957 6,表明影响种子产量的主要性状均包括在内,结实率、花序种子数和千粒重是影响种子产量的主要性状。分析得出种子产量最优多元回归方程为:y=-453.07+0.958 7x7(花序种子数)+0.342 7x8(千粒重)+0.510 5x9(结实率)。在生产实践中,提高结实率、花序种子数和千粒重是提高扁穗雀麦种子产量的有效途径。The correlation and path coefficient analysis between plant traits and seed yield of the natural succession of wild Bromus cartharticus in alpine mountains were studied based on calculation of determination coefficient and the result showed the it was ∑d= 0.957 6,and this indicated that the main components affecting seed yield had been included.The rate of fruit ripening,seed number per inflorescence and thousand seed weight were the main traits affecting seed yield.The optical multiple regression could be described as y=-453.07＋0.958 7x7（seed number per inflorescence）＋0.342 7x8（thousand seed weight）＋0.510 5x9（rate of fruit ripening）.So the effective way to increase the seed yield is to improve the rate of fruit ripening,seed of inflorescence and thousand seed weight.

关 键 词：扁穗雀麦 单株性状 相关通径分析 

分 类 号：S543.8[农业科学—作物学]