茄子耐弱光性遗传效应的初步研究

<选择弱光下茄子的坐果率、单果质量及单株产量3个主要性状，应用数量遗传学原理，研究了茄子6个世代耐弱光性的遗传效应。结果表明：弱光条件下3个性状的遗传都符合加性-显性模型。坐果率和单株产量以显性效应为主，显性势为正向超显性；单果质量性状的加性效应比显性效应略占优势，显性势为正向完全显性。3个性状的狭义遗传力分别为14.59 %、28.01 %和10.57 %，广义遗传力分别为56.64 %、44.74 %和 50.58 %。3个性状受环境影响较大。控制3个性状的最少基因数为3对、1对和4对。3个性状实施选择的适宜世代分别为F7、F5和F8，不宜在早期世代进行选择。可充分利用茄子耐弱光性的杂种优势，选择耐弱光性好的亲本，配制F1杂交组合用于生产。

Preliminary Studies on the Genetic Effects of Weak Light Tolerance of Eggplant

Three major characteristics(fruit setting percentage,single fruit weight and single plant yield)under weak light condition were selected to study the genetic effects of weak light tolerance of eggplant by using quantitative genetics.The result showed that the genetic effects of these three major characteristics can be all explained by additive-dominance model,and that dominance effects of fruit setting percentage and single plant yield are given priority.The dominance potentials of two characteristics are positive over dominance.The additive effects of single fruit weight are in the ascendant,the dominance potentials is positive complete dominance.The narrow heritability of these three characteristics is 14.59 %,28.01 % and 10.57 % respectively.The broad heritability is 56.64 %,44.74 % and 50.58 %.The three characteristics are more affected by environment.The minimum number of genes which control the three characteristics is 3,1 and 4 respectively.Optimal selection generation of the three characteristics is F7,F5 and F8 respectively.Selection should not be conducted in early generations.The heterosis of weak light tolerance of eggplant can be used to produce F1 hybrids by crossing the parents with weak light tolerance.