萝卜干物重和可溶性总糖含量的遗传分析  

Genetic analysis of dry matter weight and total soluble sugar contents in radish(Raphanus sativus L.)

作　　者：路昭亮[1] 柳李旺[1] 龚义勤[1] 李小艳[1] 宋立君[1] 杨金兰[1] 汪隆植[1] 

机构地区：[1]南京农业大学作物遗传与种质创新国家重点实验室/园艺学院,江苏南京210095

出　　处：《南京农业大学学报》2009年第3期25-29,共5页Journal of Nanjing Agricultural University

基　　金：国家自然科学基金项目(30571193);国家科技支撑计划项目(2008BADB1B03);国家863计划项目(2008AA10Z150);教育部科学技术研究重点项目(108068);江苏省高技术研究计划项目(BG2005314)

摘　　要：以干物重、可溶性总糖含量差异显著的萝卜品种Nau17-XWH和Nau20-LHZ为材料,采用植物数量性状主基因+多基因混合遗传模型多世代联合分析方法,分析了萝卜干物重和可溶性总糖含量性状的遗传规律。结果表明:干物重的最适遗传模型为两对完全显性主基因+加性-显性多基因混合遗传模型,干物重的主基因遗传率为35.00%,多基因遗传率为55.00%,因此,应在控制环境因素条件下进行轮回选择以使萝卜干物重性状的基因累积;可溶性总糖含量的最适遗传模型为两对加性-显性主基因+加性-显性多基因模型,可溶性总糖含量的主基因遗传率为98.33%,因此,萝卜可溶性总糖含量性状的遗传受环境因素影响较小,可以在早期世代进行选择。Genetic analysis was conducted on dry matter （DM） weight and total soluble sugar （TSS） content of multiple genera- tions, P1, P2, F1 and F2 derived from a cross between Naul7-XWH with higher DM weight and TSS content and Nau20-LHZ with lower DM weight and TSS content, using the method of major gene plus polygenes mixed inheritance model in quantitative traits of plants. It was concluded that the optimal model of DM weight was two complete-dominant major genes plus additive-dominant poly- genes mixed inheritance model, and the heritability of major genes in DM was 35.00% , and that of polygenes was 55.00%. They indicated that the loci for high DM weight could be pyramided with recurrent selection under the controlled conditions. The optimal model of TSS content was two additive-dominant major genes plus additive-dominant polygenes mixed inheritance model, and the heritability of major genes in TSS was 98. 33%. Therefore, the individuals with high TSS content, which was affected to a lower degree by environment, could be selected in early generation for the high heritability.

关 键 词：萝卜 营养品质 遗传模型 干物重 可溶性总糖含量 

分 类 号：S631.1[农业科学—蔬菜学]