小黑麦饲草品质性状的基因效应分析

为了对小黑麦饲草品质性状进行深入研究,利用Griffing完全双列杂交方法Ⅱ,采用加性-显性模型对6个小黑麦亲本的粗蛋白、粗脂肪、粗灰分、粗纤维和无氮浸出物5个饲草品质性状的基因效应和遗传组成进行了研究.结果表明, 粗蛋白的遗传受加性、显性和上位性及环境效应控制,粗纤维、粗脂肪和无氮浸出物的遗传主要受显性效应控制,粗灰分的遗传受加性和显性效应共同控制.饲草品质性状中除无氮浸出物外其它性状均表现出明显的自交衰退现象.

Analysis of Gene Effects of the Herbage Quality Traits in Triticale

The genic effects and genetic composition of 6 hexaploid triticale cultivars were studied for crude protein content,crude ash,crude fat,crude fiber and nitrogen-free extract by Griffing scomplete diall crossing modelⅡand additive-dominant model.The result indicated that crude protein content was controlled by additive and no-additive effects,and crude fat,crude fiber and nitrogen-free extract were controlled by dominant effects,whereas crude ash was controlled additive and dominant effects.In addition,dominant effects of per parent showed that the most herbage quality trait had obvious selfing depression.