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利用六个杂交组合的F_2群体及相应的亲本研究了亲本、组合与F_2表现的关系。试验采用随机区组排列,三次重复。 对单株荚数、单株粒数、百粒重及单株产量的分析表明,MP与有希望株率正相关;亲本值差异越小超亲越容易。六个组合的单株产量皆呈明显正态分布,组合C_6的单株荚数和单株粒数显著偏离正态(V_1>0或V_2>3),组合C_1、C_3的百粒重因V_1>0、V_2>3而表现非正态。 将正态检验方法应用于数量性状的遗传研究,从另一个侧面证明单株粒数、百粒重的遗传以加性效应为主,而单株产量的遗传要复杂得多,提出和应用了遗传丰度(D.G.V.)的概念。作为短期选出良种的程序,以选D.G.V.小的组合见效快;作为长期从事品种资源创造的程序,选D.G.V.大的组合是有益的。因为D.G.V.小的组合遗传力(h_b~2)高,遗传进度大;D.G.V.大的组合表型方差大,可遗传进度小,选择效果差,但新变异出现机率高。
The relationship between F_2 expression and parents was studied by using F2 hybrids and their corresponding parents. Randomized block test arrangement, three times repeated. Analysis of pods per plant, grain number per plant, grain weight per 100 grains and yield per plant showed that MP was positively correlated with the expected strain rate; the smaller the parental value, the easier the superfamily. The yield per plant of the six combinations showed a significant normal distribution. The number of pods per plant and the number of grains per plant in combination C_6 significantly deviated from normal (V_1> 0 or V_2> 3) > 0, V_2> 3 and non-normal. The normal test method is applied to the genetic study of quantitative traits. From another aspect, the grain number per plant and the inheritance of 100-grain weight are mainly additive effects. However, the inheritance of yield per plant is much more complicated, so it is proposed and applied The concept of genetic abundance (DGV). As a short-term selection of elite programs to choose D.G.V. Small combination of quick; as a long-term commitment to species resources to create the program, choose D.G.V. Large portfolio is beneficial. Because D.G.V. small combined heritability (h_b ~ 2) high genetic progress; D.G.V large combination of phenotypic variance, genetic progress is small, the selection effect is poor, but the new mutation with a high probability.