Analysis of the forage and grain productivity of oat cultivars

doi:10.11686/cyxb2014465

Abstract

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.

ZHOU Qing-Ping, YAN Hong-Bo, LIANG Guo-Ling, JIA Zhi-Feng, LIU Wen-Hui, TIAN Li-Hua, CHEN You-Jun, CHEN Shi-Yong. Analysis of the forage and grain productivity of oat cultivars[J]. Acta Prataculturae Sinica, 2015, 24(10): 120-130.

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