摘要
】测交试验结果表明，褐飞虱实验种群对水稻的致害性，Ｆ１群体正反交结果一致，性状均表现为亲本ＴＮ１种群的特性，回交ＢＦ１与Ｆ２的性状呈多元化趋势。其致害性的遗传符合加性——显性模式，且控制褐飞虱致害性的有效因子数为３。由此推断，褐飞虱实验种群的致害性是由多基因控制的数量性状，因此褐飞虱不存在真正的“生物型”。
Genetic model of virulence of laboratory populations of brown planthopper, Nilaparvata lugens , was studied in the laboratory. Results showed that both F 1 populations of reciprocal crosses performed similar virulence on resistant variety Mudgo to parental TN1 population. The variations observed in F 2 and backcross populations were continuous and inappropriate for Mendelian segregation. Genetic studies revealed that the inheritance of virulence of laboratory populations followed the additive dominance mode, and the number of effective factors was estimated 3. It indicated that the inheritance of virulence of laboratory populations was polygenic control, and then the “biotype” of N.lugens is not qualified as a discrete genetic entity.
出处
《西南农业大学学报（自然科学版）》
CSCD
1998年第5期438-441,共4页
Journal of Southwest Agricultural University
基金
"九五"国家重大科技攻关计划资助
关键词
水稻
褐飞虱
实验种群
致害性
遗传分析
rice plant hoppers
experiment populations
virulence
inheritance-analysis
