摘要: |
【目的】阐明黄瓜果实黄色线相对长度(黄色线长度与果实长度百分比,以下均称为黄色线比例)的遗传特点,为黄瓜果实外观品质优良品种的选育提供理论依据。【方法】以黄色线较长的自交系9501及黄色线短的自交系9502及其F1、F2、回交世代(B1、B2)为试验材料,利用ABC联合尺度遗传分析和主基因+多基因模型遗传分析2种方法,对各世代黄瓜果实的黄色线比例进行遗传分析。【结果】 ABC联合尺度遗传分析结果表明,黄色线-比例的遗传符合-加性-显性模型,加性效应[d]为-34.673,显性效应[h]为-32.037。主基因+多基因模型遗传分析结果表明,黄色线比例遗传受1对加性-显性主基因+加性-显性多基因控制,分离世代中, B1、B2、F2世代的主基因遗传率(hmg2)分别为72.79%,67.81%和81.07%;多基因遗传率(hpg2)分别为26.34%,25.93%和17.83%。主基因加性效应[d]和显性效应[h]值分别为-34.78和-32.96。2种方法分析结果表明,黄色线比例遗传均存在负向的加性、显性效应。【结论】黄色线比例的遗传以主基因遗传为主,同时受微效多基因影,环境条件影响不大,适宜进行早代选择。 |
关键词: 黄瓜(Cucumis sativus L.) 果实黄色线相对长度 遗传分析 |
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基金项目:黑龙江省农垦总局攻关项目(HNKXIV-06-03a1) |
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Inheritance of yellow line relative length of cucumber fruit |
LI Dan-dan,MA Guang-shu,TIAN Li-bo,et al
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Abstract: |
【Objective】The genetic characteristics of yellow line relative length (ratio of yellow line length to fruit length, referred as ratio of yellow line hereinafter) of cucumber fruit was studied to provide theoretical basis for breeding of cucumber varieties with high fruit appearance quality.【Method】The inbred lines (9501 with longer yellow line and 9502 with short yellow line),and their F1,F2 and backcross (B1 and B2) generations were used to analyze the inheritance of the yellow line ratio of cucumber using ABC joint analysis method and major gene plus polygene model genetic analysis method.【Result】ABC joint analysis showed that the inheritance of yellow line ratio followed the additive and dominance model,and the additive effect ([d]) and dominance effect ([h]) were -34.673 and -32.037,respectively.Major gene plus polygene model genetic analysis showed that the inheritance of yellow relative line was controlled by a major gene with additive-dominance effects plus polygene with additive-dominance effects.Heritability values of the major genes (hmg2) of B1, B2 and F2 population were 72.79%,67.81% and 81.07%,respectively.Heritability values of poly-genes (hpg2) were 26.34%,25.93% and 17.83%.The major gene plus poly-genes effect ([d]) and dominance effect ([h]) were -41.78 and -35.96,respectively.Both methods showed that negative additive effect and dominance effect existed in the inheritance of cucumber yellow line ratio.【Conclution】The yellow line ratio was controlled majorly by major gene and partly by polygene.It was rarely affected by environment and was suitable for early generation selection. |
Key words: cucumber (Cucumis sativus L.) fruit yellow line relative length genetic analysis |