茄子青枯病抗性的遗传分析

 选用6个对青枯病具有不同抗性水平的茄子自交材料，按完全双列杂交设计，配制36个组合(包含亲本自交)。苗期人工接种鉴定各组合抗性并计算病情指数，采用Grifmg方法I及Hayman方法对抗性配合力方差进行分析，估计相关遗传参数。结果表明，茄子对青枯病的抗性遗传规律符合“加性一显性”效应模型。遗传效应中同时存在加性效应、显性效应和反交效应，但以加性效应为主。茄子对青枯病的抗病性表现隐性，感病性表现部分显性。茄子对青枯病的抗性遗传较为复杂，由多个微效基因、较少的主效基因和细胞质基因共同控制。

Genetic Analysis of Resistance to Bacterial Wilt(Ralastonia solanacearum)in Eggplant(Solanum melongena L.)

Six eggplant inbred lines with diferent resistance to bacterial wilt were used as parents in this ex—periment．The populations were evaluated for their reaction to bacterial wilt by artificial inoculation at the seedlingstage．By using Grifing I an d Hayman methods，a 6×6 dialel analysis was done to analyze the variance of thecombining ability and estimate the genetic parameters．It Was suggested that the inheritance of the resistance to bac—terial wilt in the eggplan t fit to the ‘additive—dominant’ model，additive efect，dominant efect an d reciprocal effectall p|ayed a role in the genetics of the resistance to bacterial wilt in eggplant，but the additive efect Was themajor．The resistance to bacterial wilt in eggplant Was recessive and the susceptibility Was partial dominant．The re—sistance to bacterial wilt in eggplant Was controlled by a lot of minor genes，several major genes and cytoplasmgenes ·Key words： Bacterial wi lt；Resistance；Genetic analysis； Eggplan t