作物学报Issue(11)：1964-1972,9.DOI:10.3724/SP.J.1006.2014.01964
甘蓝型油菜苗期耐淹性状主基因+多基因遗传分析
Inheritance of Major Gene Plus Polygene of Water-Logging Tolerance in Brassica napus L
摘要
Abstract
The middle and lower reaches of Yangtze River is a main producing region of canola (Brassica napus L.) in China. However, canola in this region is subjected to water-logging during planting period to reduce yield. It is of importance to study the inheritance of water-logging tolerance for canola. In this paper a family lines population of six generations of P1, F1, P2, B1:2, B2:2, F2:3 derived from the cross of WR-4 (resistant)×WR-5 (non-resistant) was used to analyse genetic segregation by applying major gene plus polygene mixed inheritance model. The seedling mortality was recorded on the 7th day after logging-removing for plant recovery following six days full-submergence treatment of the seedlings in 2012 and 2013. The results showed that the seedling mortality was respectively fitted the genetic model of E-0 and B-3, i.e., two pairs of additive-dominant-epistatic major gene plus additive-dominant-epistatic polygene model and two pairs of additive major genes model. This result confirms that water-logging tolerance of seedling in this cross is controlled mainly by two major genes which expressed in the mode of additive-dominant-epistatic effects. While dominant effects expressed (2012) it gave a higher value of|ha|=0.3475,|hb|=0.0069 than the additive ef-fect of the major genes which was |da|=|db|=0.0036. In the populations of B1:2, B2:2, and F2:3, h2mg was 36.25%, 61.40%, and 61.84%, respectively, with an average of 53.16% in 2012, and 8.30%, 30.48%, and 43.13%, respectively, with an average of 27.30%in 2013. Variance from environment effects was 59.77%of the total phenotypic variance on an average in two years. A conclusion could be made that water-logging tolerance of seedling in B. napus is controlled by two major genes but heavily af-fected by environment. Since a higher value of h2mg was detected in F2:3 populations, selection in early generations might be an effective way for waterlogging tolerance breeding in B. napus.关键词
甘蓝型油菜/耐淹性/主基因+多基因/遗传分析Key words
Brassica napus L./Water-logging tolerance/Major gene plus polygene/Genetic model引用本文复制引用
金岩,吕艳艳,付三雄,戚存扣..甘蓝型油菜苗期耐淹性状主基因+多基因遗传分析[J].作物学报,2014,(11):1964-1972,9.基金项目
本研究由农业部引进国际先进农业科学技术计划(948计划)项目(2011-G23),国家现代农业产业技术体系建设专项(CARS-13)和江苏省农业科技自主创新资金[CX(11)4009]资助。 （948计划）
