抗黄矮病小麦品系粒重遗传特性研究

Studies on hereditary character of grain weight for resistant BYDV materials in winter wheat

采用Griffing方法I,对抗黄矮病 (BYDV)小麦品系单株粒重、单穗粒重和千粒重遗传特性研究结果表明 ,3种粒重遗传符合加性 显性遗传模型 ,细胞质作用对千粒重影响较小 ,株粒重和穗粒重则存在明显核质互作 ;3个抗黄矮病品系中“临抗 1号”单株产量特殊配合力方差最大 ,一般配合力效应值也较高 ,亲本组合间存在极显著差异 ,为优良抗病丰产亲本 ,在抗病育种中有较大利用价值。

Study on heredity of three characters of grain weight per plant, per spike, and 1000-grain of the resistant BYDV materials in winter wheat are conducted using Griffing method Ⅰ. The results show that the genetic of grain weight of three varieties is a additive-dominant genetic model, and the cytoplasm effect is smaller on 1000-grain weight, and in the grain weights per plant and spike, an obvious nucleus-cytoplasm interact exists. In the three resistant BYDV materials, the specific combining ability of 'Linkang 1' is the biggest and its general combining ability is higher and its intercombinations have the marked differences. Therefore, 'Linkang 1' is a good parent with its resistant BYDV and fertility and has a bigger useful value.