番茄主要品质性状的遗传模型及效应分析

摘要

[Objective] To study genetic model and genetic effect of main quality characters of tomato.[Method] Six parents of tomatoes were tested in the complete parallel cross design.The genetic model,gene effects of 8 quality characters were studied.[Result] Very significance was found in quality characters of parents,the selection of parents was effective.Very significance was found between characters.Among 8 characters,fruit shape index and lycopene can be explained with the additive-dominance model in reciprocal crosses.The dominant effects among(direct cross) combinations of the two characters were more important than the dominant effects of them,and the genetic effects showed active recessive effects.The broad sense hereditabilities were more than 50％,the narrow sense hereditabilities were less than 50％,it had over dominance effects.The performance of reciprocal cross was on the contrary.Other characters didn't meet additive-dominance model because of no dominance effects or epistasis effects.[Conclusion] The study provides a theoretical basis on apolegamy of tomato advantage combination.%[目的]研究番茄主要品质性状的遗传模型和遗传效应.[方法]采用完全双列杂交方法,将6个品种的番茄配成30个杂交组合,对番茄8个品质性状的遗传模型、基因效应进行研究.[结果]亲本品质性状间的差异均达到极显著水平,表明亲本选择有效.各个性状在各基因型间均达到极显著水平,8个品质性状中,果形指数和番茄红素在正交以及反交组合中均符合加性-显性模型.其中2个性状的正交组合基因均以显性为主,效应方向为隐性增效,h2B均大于50％,h2N均小于50％,并表现超显性;其他几个性状由于不存在显性效应或者存在上位性效应而不符合加性-显性模型.[结论]该研究为番茄品质育种优势组合的选配提供了理论基础.