青海省青稞主栽品种农艺性状分析

Analysis of Agronomic Characters of Major Hulless Barley Cultivars in Qinghai Province

为研究青海省青稞主栽品种的遗传基础多样性,为青稞的遗传改良与育种利用提供依据。以26份青稞青海省青稞主栽品种为试验材料进行农艺性状分析,并对性状之间进行简单相关和偏相关分析,多元逐步回归和通径分析。结果表明:9个农艺性状变异程度和范围相当大,某些品种有一定优势可利用。相关分析表明多个性状影响单株粒质量;多元逐步回归和通径分析表明单株穗数、千粒质量、穗粒数是对单株粒质量产生影响的主要因素。最优回归方程(Y=-17.848+1.548 X_1+0.368X_2-0.428X_3+0.192X_4-0.048X_5)能解释单株粒质量变异的75.2%。结果显示青海省青稞主栽品种农艺性状多样性比较高,遗传基础比较丰富,而且在进行性状选择时,应注重单株穗数和千粒质量的选择,同时应该考虑到穗长与千粒质量、单株穗数与穗粒数的相互制约关系。

In order to study the diversity of the genetic basis of the hulless barley cultivars in Qinghai and provid helpful information for the genetic improvement and breeding utilization of hulless barley,the agronomic characters of 26 hulless barley cultivars were evaluated by using the statistical methods of simple and partial correlation analysis,multiple stepwise regression and path analysis in order to provide helpful information for the genetic improvement of hulless barley.The results showed that the degree and range of 9 agronomic characters variation is were quite large,and some species have had certain available advantages.The correlation analysis showed that multiple traits influenced the grain yield;multiple stepwise regression and path analysis showed that spike number per plant,1000 grain weight and grain number per spike is were the main affecting factors in grain weight per plant.And 75.2%variation of grain weight per plant could be explained by the multiple regression equations Y= -17.848＋1.548 X_1＋0.368X_2-0.428X_3＋0.192Ar4-0.048X_5.The results showed that the hulless barley cultivars in Qinghai had high diversity in agronomic characters and rich genetic basis.And In in the character selection,attention should be paid to the spike number per plant and 1000 grain weight selection,and the mutual restrict relationship between spike length and 1000 grain weight,spike number per plant and grain number per spike should be concerned.