茄子高抗青枯病雄不育系的创制及应用评价

Creation and Application Evaluation of Male-sterile Eggplant Lines with High Resistance to Bacterial Wilt

嫁接是防治茄子青枯病的主要手段,生产上对优势抗性砧木需求旺盛。以稳定的雄不育兼单性结实材料CMSD-6为雄不育供体亲本,以高抗青枯病材料BW2、BW9、铁木砧为抗青枯病供体亲本,通过杂交、回交及农艺性状、育性、抗病性鉴定、配合力分析等方法,培育综合性状优良的高抗青枯病雄不育系CMSBW2、CMSBW9、CMSTMZ,其中CMSBW2主茎粗和株高一般配合力(GCA)效应值均最高,青枯病发病率GCA效应值最低,可作为茄子砧木新品种培育的核心亲本加以应用。研究结果为实现茄子砧木抗性升级、降低人工制种成本、确保杂种纯度、防止亲本流失奠定了材料基础。

Grafting was mainly used for the control of bacterial wilt in eggplant.There is a strong demand for dominant resistant rootstocks in production.In this study,we used stabilized male-sterile and parthenocarpic line CMSD-6 as the male-sterile donor parent and high resistant lines BW2,BW9,‘Tiemuzhen’as the resistant donor parents to bacterial wilt.Combined with hybridization,backcrossing,identification of agronomic traits,fertility,resistance and analysis of combining ability,we cultivated 3 excellent male-sterile lines(CMSBW2,CMSBW9,CMSTMZ)with high resistance to bacterial wilt.Furtherly,CMSBW2 showed the highest GCA effect value for main stem diameter and plant height,and the lowest GCA effect value for incidence of bacterial wilt,which could be used as the core dominant parent for the cultivation of rootstock in eggplant.This study lay a material foundation for improving the bacterial wilt resistance,reducing the cost of manual seed production,ensuring hybrid seed purity,and preventing parental loss.