谷子顶三叶与主要农艺性状的相关性分析

Correlation Analysis on Top Three Leaves and Main Agronomic Traits in Foxtail Millet

为了明确谷子从早期品系到育成品种过程中顶三叶和其他农艺性状的变化规律,本研究利用41份育种品种和30份早期品系,在60万株/hm2种植密度下,分析育成品种和早期品系顶三叶性状的差异,以及与其他农艺性状的关系。结果表明,育成品种顶三叶长度、宽度和面积总体上高于早期品系,而变异幅度低于早期品系;育成品种顶三叶性状之间的相关性明显高于早期品系,而顶三叶与穗部性状之间的相关性低于早期品系;育成品种产量与顶三叶大小显著负相关,这种负相关关系主要存在于叶片较大的品种中,而在叶片较小的品种中并不存在。本研究结果为谷子品种选育中对顶三叶性状的选择提供参考。

In order to determine the changes of top three leaves and other agronomic characters from early lines to cultivars in foxtail millet,41 cultivars and 30 early lines were planted at the planting density of 600 000 hm2 plants,to analyze differences in characters of top three leaves between foxtail millet cultivars and early lines,and their relationships with other agronomic characters.The results showed that the length,width and area of top three leaves in the cultivars were larger than those in the early lines,while the variation ranges of the traits in the cultivars were lower than those in the early lines.Correlation analysis showed that there were higher correlations among the traits of top three leaves in the cultivars than those in the early lines,while there were lower correlations between the traits of top three leaves and spike traits in the cultivars than those in the early lines.There was a significant negative correlation between yield and the size of top three leaves in the cultivars with large leaves,but not in the cultivars with small leaves.The study provides guidance for character selections of the top three leaves in breeding of foxtail millet.