矮秆蓖麻杂交种籽粒性状、品质性状的相关及回归分析

Correlation and Regression Analysis of Grain and Quality Characteristics of Dwarf Castor Hybrids

本研究以通辽市农业科学研究院育成的10个矮秆Lm型标记雌性系和9个矮秆恢复系,采用NCII交配设计配制90个矮秆蓖麻杂交组合,对F1组合及亲本的籽粒大小、品质性状进行了相关、通径及回归分析.结果表明,籽仁含油率与籽粒容重、籽粒百粒重、籽仁百粒重、籽粒出仁率呈显著或极显著正相关;籽粒出仁率、籽粒含油率、籽仁含油率与硬脂酸、油酸呈极显著正相关,与亚油酸、亚麻酸呈显著或极显著负相关;蓖麻油酸的相对含量与棕榈酸、硬脂酸、油酸、亚油酸、亚麻酸、花生酸、花生一烯酸、山嵛酸的相对含量呈极显著负相关;蓖麻籽粒性状、品质性状对籽粒含油率的直接贡献大小依次为:籽粒出仁率>籽粒百粒重>籽粒三轴(长度、宽度、厚度)乘积>籽粒体积>籽粒厚>籽粒容重>籽粒长>籽粒宽>籽仁百粒重;通过回归分析,得出籽粒宽、籽粒三轴乘积、籽粒百粒重、籽粒出仁率4个性状与籽粒含油率的回归方程,为蓖麻品质育种提供理论依据.

Correlation path and regression analysis on dwarf castor hybrid grain size and quality traits of parents and their F1 combinations were determined.Hybrids studied included 10 dwarf Lm type marker female and 9 dwarf restorer line bred by the Academy of Agricultural Sciences of Tongliao and the 90 dwarf castor hybrid combination made up of NCII mat design.The results show that kernel oil content is significantly or very significantly positively correlated with grain bulk density,100-grain weight,kernel yield ratio and seed and 100-kernel weight.Kernel yields ratio,kernel and grain oil content are very significantly positively correlated with stearic acid and oleic acid,and significantly or very significantly negatively correlated with linoleic acid and linolenic acid.The relative content of ricinoleic acid was significantly negatively correlated with the relative contents of palmitic,stearic,oleic,linoleic,linolenic,arachidic,arachidonic and behenic acids.The direct contributions to castor grain and quality traits to grain oil content are as follows:Kernel yield ratio>100-grain weight>three axis of grain product(length,width,thickness)>grain size>grain thickness>grain bulk density>grain length>grain width>seed and 100-kernel weight.Through regression analysis,the regression equation of grain width,grain three axis product,100-grain weight and kernel rate of 4 characters and kernel oil content was obtained,which provides a theoretical basis of the quality of castor quality breeding.