西葫芦果实性状的遗传分析

 应用数量遗传学原理, 研究了西葫芦3个杂交组合5个果实性状的遗传效应。结果表明: 各性状的遗传符合加性- 显性模型, 在3个组合中具有不同程度的显性效应和加性效应; 3个组合中大多数果长、果径、果形指数和果肉厚的显性效应值为正值, 超过或者接近加性效应值。瓜柄长的显性效应值为负值。果长、果径及果形指数的广义和狭义遗传力较大。瓜柄长和果肉厚性状广义和狭义遗传力较小。

Genetic Analysis on Five Fruit Characters of Summer Squash

By using principles of quantitative genetics, genetic effects of five fruit characters of summer squash were analyzed. The results indicated that genetic patterns of all five characters fitted additive and dominant model. Different degree of dominant effects and additive effects existed among five characters of summer squash in three combinations. Most characters of fruit length(FL), fruit diameter(FD), fruit index(FI) and fruit flesh thickness(FFT) in three combinations showed positive dominant effects that were close to or beyond corresponding additive effects while fruit stalk length(FSL) had negative dominant effect. Broad and narrow heredity abilities of FL, FD and FI were bigger and that of FSL and FFT were smaller.