草业科学Issue(10)：120-130,11.DOI:10.11686/cyxb2014465
不同燕麦品种饲草和籽粒生产性能分析
Analysis of the forage and grain productivity of oat cultivars
摘要
Abstract
In order to explain reason for forage and grain yield difference of oat cultivars,eight oat cultivars widely planted in Qinghai province were used in this study.Special-traits of the high yield oat was found through cluster analysis,correlation analysis and multiple stepwise regression.The main results as below.1) The forage and grain yield productivity was different among cultivars,the forage and the grain yield of Qingyan 1 and Linna was highest,and that of the Caoyou 1 and Qingyou 2 was lowest.2)Eight oat cultivars could be grouped into two clusters according to the cluster analysis.Cluster 1 included Jiayan 2,Qingyin 2,Caoyou 1 and Qingyou 2,they have relatively poor performance.Cluster 2 included Linna,Qingyan 1,Neon and Qingyongjiu 887,they have relatively better performance,with 12.8% and 14.2% higher forage and grain yield than that of cultivars in cluster 1.3)The forage yield of both two clusters was positively correlated to the stem diameter,and negatively correlated to the plant height.Also the grain yield of both two clusters were positively correlated to the plant height,grain weight per spike,kernel weight,the length and the width of the seed with rafter,indicating that the relationship between forage yield and traits of oats are relatively stable.4) The multiple stepwise regression results showed that the contribution rate of the stem diameter to the forage yield was high and significant,and the same for the contribution rate of the stem diameter and seed width to the grain yield for both two clusters.Compared with the first cluster,the smaller negative coefficient value of stem diameter and the larger positive coefficient of the seed width in the regression equation between traits and yield is the inner high yielding reason for the second cluster.Thus,the stem diameter and the seed width could be used as an important index in the selection and breeding of oat.关键词
性状/聚类分析/相关分析/多元逐步回归Key words
traits/cluster analysis/correlation analysis/multiple stepwise regression引用本文复制引用
周青平,颜红波,梁国玲,贾志峰,刘文辉,田莉华,陈有军,陈仕勇..不同燕麦品种饲草和籽粒生产性能分析[J].草业科学,2015,(10):120-130,11.基金项目
西南民族大学引进人才项目“青藏高原植物种质资源挖掘保护与利用”（2013RC04），科技部科技支撑项目“青海地区优质牧草选育及生产利用技术集成与示范”（2011BAD17B05-5）和青海省青藏高原优良牧草种质资源利用重点实验室（2014-z-y12）资助。 （）
