棉花产量、铃数和铃重都是受微效多基因控制的数量性状。尽管控制这些性状的单个基因效应难以测定,但可以把控制这些性状的微效多基因作为整体考虑,运用统计方法获得基本的遗传规律。Mather等生统遗传学家运用统计方法把基因作用效应分为加性、显性、上位性效应以及它们与小环境的 Cotton yield, boll number and boll weight are all quantitative traits controlled by the microscopic polygenes. Although the single gene effect controlling these traits is difficult to measure, the microscopic polygenes controlling these traits can be considered as a whole, using statistical methods to obtain the basic genetic laws. Mather and other living geneticists using statistical methods to genotoxic effects are divided into additive, dominant, epistatic effects and their small and environmental