甘蓝型油菜硼营养高效的遗传分析

利用土壤有效硼缺乏的田间小区试验 ,研究甘蓝型油菜硼营养高效品种和低效品种间 2个杂交二代群体及其回交一代硼营养性状的分离规律。结果发现 ,硼营养高效受一对主效基因控制。在缺硼胁迫下 ,硼高效性状与抽薹天数和生育天数之间紧密连锁 ,生育期 (抽薹天数和生育天数 )可作为甘蓝型油菜硼高效种质筛选及其杂种后代硼效率鉴定和选育的参考指标。

Genetic analysis on the boron nutrition efficiency of rapeseed

The segregation law of boron(B) nutrition trait in two F₂ population crossed between B efficient cultivars and a B inefficient cultivar and its back cross populations in rapeseed(Brassica napus) was studied under field experiment, which soil available boron was deficient. The results showed that a major gene mainly control the B efficient phenotype of rapeseed. Under the condition of boron deficiency in soil, the seed yield of individual in F 2 population was significant negative related to the agronomic traits of bolting date and growth date. This suggested that the growth period (bolting days and growth days) were tightly linked to the boron efficiency (seed yield at boron stress) and the growth period may be used as a assistant index to identify boron efficiency rapeseed and hybrid.