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首页> 外文期刊>Journal of genetics >Genetic control of reproductive and fruit quality traits in crosses involving cultivars and induced mutants of tomato (Solanum lycopersicum L.)
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Genetic control of reproductive and fruit quality traits in crosses involving cultivars and induced mutants of tomato (Solanum lycopersicum L.)

机译：涉及番茄杂交杂交杂交和果实品质性状的遗传控制（Solanum Lycopersicum L.）

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Development of mutants and their effective utilization to incorporate desirable traits in tomato would be a sound improvement strategy to develop so called a??smarta?? tomato variety of the coming century. Initially we developed three induced mutants from two varieties, a??Patharkuchia??, a local adapted cultivar and an introduced variety a??Berikaa??, and then three crosses (Berika 9 P Mut-5, Berika 9 P Mut-11, Patharkuchi 9 B Mut-1) were made to involve in these two varieties and their respective mutants. Six generations (P1, P2, F1, F2, BC1 and BC2) of three crosses were utilized to study the genetic control of yield and quality traits, and to study the genetic basis of formation of dark green fruit. The nature and magnitude of gene action controlling the inheritance of 27 quantitative traits differed from one cross to another and from one trait to another, mostly conditioned by nonadditive gene action and duplicate epistasis. The prevalence of duplicate epistasisin three crosses for most of the traits revealed that the pace of progress through conventional selection process would be hindered as this kind of epistasis might result in decreased variation in F2 and subsequent generations. Recurrent selection in biparental progenies would be helpful for exploiting this type of nonallelic interaction through generation of high frequency of desirable recombination and concentration of genes having cumulative effects in the population. We also observed complex genetic behaviour of some of the traits revealing significant epistatic components. Inheritance study of a??dark green fruita?? (dg1) of Berika 9 P Mut-5 cross revealed a single recessive gene governing the trait and expressed when the mutant gene was in homozygous recessive condition (designated as dg-1/dg-1).
机译：突变体的发展及其有效利用在番茄中纳入所需的特质将是一个叫做的声音改善策略，所谓的一个叫做??西红柿各种世纪。最初，我们开发了来自两个品种的三个诱导突变体，a ?? patharkuchia ??，局部适应品种和介绍的品种a ?? berikaa ??，然后是三个十字架（Berika 9 p mut-5，Berika 9 p mut-11 ，使PATHARKUCHI 9 B mut-1涉及这两个品种及其各自的突变体。利用三个交叉的六代（P1，P2，F1，F2，BC1和BC2）研究了产量和质量特征的遗传控制，并研究了深绿果实形成的基础。控制27个定量性状的基因作用的性质和程度与另一个交叉差异​​不同，从一个特征到另一个特征，主要由非过年基因作用和重复的超越调节。对于大多数特征的重复外科三十次交叉的患病率揭示了通过常规选择过程的进展步伐，因为这种超声可能导致F2和后代的变化降低。通过产生高频率的期望的重组和群体中具有累积效应的基因浓度，千分之一的前后代的反复选择是有助于利用这种类型的非平行相互作用。我们还观察到一些揭示了重要的官方构件的一些特征的复杂遗传行为。遗传研究暗绿色果实?? （DG1）Berika 9 p mut-5交叉显示了一种控制性状的单一隐性基因，并且当突变基因处于纯合的隐性条件（指定为DG-1 / DG-1）时表达。

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