杉木3种交配设计试验种子品质的遗传分析

Genetic Analysis of Seed Quality of Chinese-fir in Three Controlled Pollination Tests

根据贵州省黎平县国营东风林场杉木无性系3种交配设计试验,对种子检验结果进行了统计分析.结果表明:各交配组合在种子品质各指标上差异极显著.在全双列交配中,自交对涩籽率影响最大,而对空籽率影响不大;正反交效应差异显著,绝大多数指标特殊配合力的方差分量大于一般配合力,但扣除自交组合后,结论与此相反.在不连续半双列交配和测交系交配试验中,多数指标的一般配合力方差分量大于特殊配合力,母本的一般配合力的方差分量大于父本.

Seeds of Chinese-fir produced by three kinds of mating design in Dongfeng Forest Farm, Liping county were tested. The quality of seeds originated from various mating crosses differed significantly. Selling was one of the primary causes producing tannic seeds, but it had no significant effect on the production of empty seeds. For most seed traits, general combining ability （GCA）, special combining ability（SCA） and reciprocal effects also differed significantly in various crosses. In the tests of disconnected half-diallel and polycross, GCA is greater than SCA, and more significant for female parents than male.For complete diallel mating design, if selfing crosses were reduced, the result would be similar to partial half-diallel and prolycross tests.