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1976年在大田发现了一株雄性不育的美国比马棉植株。棉花雄性不育作为标志性状和在人工杂交中用雄性不育系作母本是很有用的。本研究的目的是测定基因控制的比马棉雄性不育性状的遗传和检测比马棉雄性不育基因与其它突变体基因之间的可能连系。比马棉雄性不育株和正常的雄性可育“比马S-5”植株之间进行杂交,产生了雄性不育和雄性可育的F_1 植株,其比例为1∶1。F_1 不育株与比马S-5杂交的BC_1 后代符合1不育∶1可育的比例。F_1 可育株与比马S-5杂交只产生可育的后代。这些资料证明雄性不育性状受一个显性基因控制。该性状定名为雄性不育12,基因符号为Ms_(12)。连锁测验证明Ms_(12)与23个棉属突变体基因之间没有任何关联。本文还讨论了Ms_(12)与其它遗传的雄性不育性之间的相互关系。
A male sterile American Pima cotton plant was found in Daejeon in 1976. It is useful to use male sterility of cotton as a trait and to use male sterile lines as female parents in artificial crosses. The purpose of this study was to determine the inheritance of gene-controlled Pima cotton male sterility traits and to examine the possible linkage between the Pima cotton male sterile gene and other mutant genes. The Pima cotton male-sterile and the normal male fertile “Bi-horse S-5” plants were crossed to give male sterile and male fertile F1 plants in a ratio of 1: 1. The BC_1 progeny of F_1 sterile plants crossed with Bhima S-5 fit 1 sterile: 1 fertile ratio. F_1 fertile plants cross with bima S-5 to produce fertile offspring. These data demonstrate that male sterility traits are controlled by a dominant gene. The trait was named as male sterility12 and the gene symbol was Ms_ (12). There was no correlation between Ms_ (12) and 23 Gossypium mutant genes by linkage test. This article also discusses the relationship between Ms_ (12) and other genetic male sterility.