春谷杂种蛋白质含量的遗传分析

The Genetic Analysis on Protein Content in Spring Foxtail Millet Hybrids

对春谷15个杂交组合后代蛋白质含量的遗传特点进行了研究。结果表明,F_1呈倾母遗传,遗传表现比较复杂,F_2变异广泛,分布多数为单峰曲线,也有双峰曲线,并非所有组合都是正态分离,g_1为正值,呈正向倾斜。遗传以加性效应为主,也有显性作用。h_B^2一般为46.16％～55.79％,△G为1.07％～1.83％,△G′为7.97％～14.07％。超亲现象普遍,有的组合超高含量株率较高,早期世代选择效果较好。F_2与中亲值和母本均呈极显著的正相关。

The hereditary characters of seed prtoein content in fifteen crosscombinations of spring foxtail millet (Setaria italica Beauv. ) were studied. The results showed that F! had a higher hybrid vigor with a matroclinal inheritance. Types with non-dominance, complete positive or complete negative dominance were not found in these combinations, but the types with partially positive dominance amounted to 53.8% of the total while the types with superparental heterosis consisted of 23.1%. F progenies varied greatly and had single-peak distribution curves or double-peak distribution curves. Normal distribution tests revealed that F had a normal distribution with a small deviation for g,> 0. Nevertheless, not all of the mating groups exhibited normal segregation. Additive effects were found predominant in inheritance while dominant effects also existed. Generally, hzB of the protein content was about 46.16-55.79%, G was about 1.07-1.83%. AG'was about 7.97-14.07%. In these combinatons, superparent phenomena were widespread,and a great number of high protein individuals were found. Therefore, an early generation selection might lead to a good result. As F was highly significantly correlated with MP and the female parent, four principles for parent selection were suggested.