摘要
"第三次全国农作物种质资源调查与收集"项目组历时2年从重庆地区收集到49份绿豆种质资源,供发掘优异基因及育种利用,我们评估这些资源的表型遗传多样性和枯萎病抗性水平。结果表明:这些新收集绿豆种质资源遗传多样性丰富,数量性状遗传多样性指数排序为:单株荚数>株高>主茎节数>分枝数>底荚高度>荚宽>荚长>百粒重>开花期>单荚粒数>成熟期>出苗期;各质量性状遗传多样性指数排序为:荚形>分枝性>复叶叶形>粒形>种皮光泽度>生长习性、结荚习性>熟荚色>对生单叶形>花色、主茎茸毛色>子叶色>粒色>幼茎色。聚类分析将49份种质资源划分为5个类群,第Ⅰ类群主要表现为矮秆、宜机收,第Ⅱ类群主要是大籽粒材料,第Ⅲ类群可作黄籽粒特色材料加以利用。三维散点图中,前3个主成分将49份种质资源大致分布在2个区域,分布在区域Ⅰ的材料多为直立型材料,而分布在区域Ⅱ的材料多为半蔓生型材料。经枯萎病抗性鉴定,从49份种质资源中筛选出中抗资源9份,抗病资源3份,高抗资源1份。本研究为后续优良种质的开发利用和抗绿豆枯萎病基因发掘提供了理论和种质基础。
Forty-nine mung bean germplasms newly collected from Chongqing in the recent two years were analyzed based on their phenotypic data and evaluated on the resistance to fusarium wilt,which is a most serious disease in Chongqing and surrounding areas. The results showed that the genotypes of mung bean collected in Chongqing were rich in genetic diversity The genetic diversities index of quantitative characters were ranked as:Number of pods per plant>Plant height>Node number of main stem>Number of branches>Bottom pod height>Pod width>Pod length>100-seed weight>Flowering days>Number of seeds per pod>Maturing days>Emergence days,and the genetic diversities index of qualitative characters were ranked as:Pod shape>Branching>Trilobate leaf shape>Seed shape>Seed coat glossiness>Growth habit and Podding habit>Mature pod color>Simple leaf shape>Flower color and Main stem hair color>Cotyledon color at emergence>Seed coat color>Young stem color. According to cluster analysis,the 49 genotypes were divided into 5 Groups:Group Ⅰ of dwarf materials suitable for mechanization,Group Ⅱ of large-seeded materials,Group Ⅲ of yellow seed materials. In the threedimensional scatter diagram,the first three principal components have the 49 genotypes distributed roughly in two regions. The genotypes distributed in Region Ⅰ were mostly of the erect type,while those distributed in Region Ⅱ were mostly of the half sprawling type. Among the 49 genotypes,9 mediumly resistant genotypes,3 resistant genotypes and 1 highly resistant genotype were identified. This study provides a theoretical and germplasm basis for the development and better utilization of mung bean genetic resources and genes of resistance to fusarium wilt.
作者
龙珏臣
张继君
张晓春
刘剑飞
陈红
王萍
王强
杜成章
LONG Jue-chen;ZHANG Ji-jun;ZHANG Xiao-chun;LIU Jian-fei;CHEN Hong;WANG Ping;WANG Qiang;DU Cheng-zhang(Chongqing Academy of Agricultural Sciences,Chongqing 401329)
出处
《植物遗传资源学报》
CAS
CSCD
北大核心
2020年第5期1167-1174,共8页
Journal of Plant Genetic Resources
基金
重庆市科研院所绩效激励引导专项(cstc2018jxjl80041)。
关键词
绿豆
种质资源
遗传多样性
枯萎病抗性
mung bean
germplasm resources
genetic diversity
resistance to fusarium wilt
