高粱杂交二代生育期遗传特性的研究

THE HEREDITARY CHARACTER OF GROWTH PERIOD IN SORGHUM F2 GENERATION

摘要:

本文对中国高粱杂交F₂代生育期遗传特性进行了研定。结果表明,中国高梁生育期遗传为数量性状遗传,双亲生育期的表现支配F₂代生育期的表现。以中亲值来预测杂交F₂代生育期均值,可以掌握F₂代群体中个体出现最多的生育日期。以双亲生育期差异来预测F₂代群体分离幅度,可以掌握F₂代变异大小,这对制订育种计划将有裨益。对于其它数量性状是否亦采用这种方法有待于进一步研究。本研究结果还表明,在长期的选优淘劣的作用下,地方品种早熟性基因占优势,有列于北疗早熟性育种。

Abstract:

The heriditary Character of the growth Period in F₂ of chinese sorghum was studied. Results indicated that the heredity of growth Period in F₂ was guantitative inheritance. The expression of the trait in F₂ was mainly determined by the parents. By using the mid-parents value to Predict the mean value of the trait in F₂, it promised to know the exhibition Period of most individualities in the F₂ population; while according to the difference of growth period between Parents the deviation range of the trait in F₂ could be Predicted, and the variation of the trait in F₂ could be calculated. These would be beneficial for design of breeding programme. Whether the research method also fit to other quantitative traits test should be further studied.
The results also showed that the predominance of earlier maturation genes was presented in local Sorghum varieties, due to the effects of continuous selection. It may be important to the northern region breeding programs for earlier maturation breeding object.