摘要： 选用桔红心、黄心和白心大白菜的纯系材料配制成桔红心×白心、黄心×白心和白心×白心(亲本之一,花也为白色)的F₁,F₂,BC₁和BC₂,研究大白菜球色、花色的遗传规律和二者的相关性.结果表明,大白菜的桔红色和白色两种花色对黄色花的遗传表现为一对隐性等位基因控制的简单遗传.球色为桔红色对白色表现为一对隐性等位基因控制的简单遗传,而球色为黄色对白色表现为数量遗传的特点.另外,桔红色花和球色完全连锁,即花色为桔红色的其球色也为桔红色,且两者的遗传规律也一样.白、黄二球色与花色不存在相关性,因此,在配制桔红心的F₁时,双亲必须都是桔红心材料,在配制黄心的F₁时,双亲也必须是黄心材料.

关键词: 大白菜, 球色, 花色, 遗传规律, 相关性

Abstract: F₁, F₂, BC₁and BC₂seedswere obtained through crossing, self crossing and backcrossing by Chinese cabbage( Brassica campestris ssp.pekinensis)of yellow and white heading, orange and white heading, two white headings( one of parent s flowers is also white) in order to study the hereditary characteristics of heading colors, flower colors and pertinency between them.Results showed Chinese cabbage heredity of orange and white flower colorswas controlled by pairs of recessive allele.Heading colors of orange and yellow showed differ ent heredity characteristics.Heredity of orange heading was controlled by pairs of recessive allele, while that of yellow heading showed quantity characteristics.F₁, BC₁ and BC₂ of yellow heading separated different white, yellow and middle color heading types.Meanwhile orange heading and orange flower color were linked, that is, orange heading color showed the same flower color and heredity characteristics.While white and yellow heading colors were not linked to flower colors.Therefore, for orange heading F₁, two parents must be orange heading, and for yellow heading F₁, two parents must also be yellow heading.

Key words: Chinese cabbage, Heading color, Flower color, Hereditary characteristics

中图分类号: 

• S603.2