GENETIC-BASIS OF RESISTANCE AGAINST 2 TOSPOVIRUS SPECIES IN TOMATO (LYCOPERSICON-ESCULENTUM)
GENETIC-BASIS OF RESISTANCE AGAINST 2 TOSPOVIRUS SPECIES IN TOMATO (LYCOPERSICON-ESCULENTUM)
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DOI：
10.1007/bf00023478
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发表时间：
1993-01-01
期刊：
影响因子：
1.9
通讯作者：
GIORDANO, LD
中科院分区：
文献类型：
--
作者：
BOITEUX, LS;GIORDANO, LD
通过遗传研究确定了番茄对两种不同的TospoVirus(番茄斑枯病病毒和番茄褪绿斑病毒)的抗性遗传基础，这两种病毒属于在巴西发现的番茄斑枯病病毒复合体。利用抗病亲本‘CNPH TX 405’和感病亲本‘IPA5’配制了F-1、F-回交和F-2群体。分离比表明，对两种病毒的抗性均符合单基因显性遗传模型。利用50对无性繁殖的F-2植株(分别接种每种病毒)的数据进行的初步测试表明，相同的基因(可能是Sw-5基因)控制着对这两种病毒的抗性。该基因表现出一种特殊的作用模式，与垂直抗性反应非常相似，但作用于TospoVirus属内的大量表型变异和物种。
Inheritance studies were conducted to determine the genetic basis of resistance in tomato (Lycopersicon esculentum) against two distinct Tospovirus species (tomato spotted wilt virus and tomato chlorotic spot virus) belonging to the 'tomato spotted wilt virus complex' identified in Brazil. F-1,F- backcrosses and F-2 populations were developed using the resistant parent 'CNPH Tx 405' and susceptible parent 'IPA5'. Segregation ratios indicated that the inheritance of resistance to both viruses fit a single dominant gene-model. Preliminary tests using data from 50 pairs of vegetatively propagated F-2 plants (inoculated separately with each virus) indicated that the same gene (probably the Sw-5 gene) is controlling the resistance to both viruses. This gene displays a peculiar mode of action, closely resembling a vertical resistance response, but acting against a large number of phenotypic variants and species within the genus Tospovirus.