SOURCES OF RESISTANCE TO TOMATO SPOTTED WILT VIRUS (TSWV) IN CULTIVATED AND WILD-SPECIES OF CAPSICUM

被引：44

作者：

BOITEUX, LS ^{[1
]}

NAGATA, T ^{[1
]}

DUTRA, WP ^{[1
]}

FONSECA, MEN ^{[1
]}

机构：

[1] CTR NACL PESQUISA RECURSOS GENET & BIOTECNOL,EMBRAPA,BR-70849-970 BRASILIA,DF,BRAZIL

来源：

EUPHYTICA | 1993年 / 67卷 / 1-2期

关键词：

CAPSICUM SP; PEPPER; TOMATO SPOTTED WILT VIRUS; FIELD RESISTANCE; ISOLATE-SPECIFIC RESISTANCE; DISEASE SCREENING;

D O I：

10.1007/BF00022729

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

A germplasm collection of 70 cultivars and wild species of Capsicum was evaluated for resistance to tomato spotted wilt virus (TSWV) under field (natural inoculum) conditions. Different levels of resistance to the disease caused by this virus were observed among the tested lines. High degree of field resistance was detected in two Capsicum baccatum var. pendulum, two C. chinense, and three C annuum lines. Controlled greenhouse tests were also carried out to confirm the resistant reaction of these seven field selected lines. These lines were mechanically inoculated with two serologically distinct isolates of TSWV obtained from different geographic regions of Brazil. The two C. chinense lines ('CNPH 275' and 'PI 159236') were virtually immune against one specific (TSWV-BsB) isolate but were susceptible to another isolate (TSWV-SP) used in this assay. Sources of resistance for both isolates were not found. Our experimental results strongly indicate there exists a number of genetic mechanisms (probably including action of vertical and horizontal genes) to TSWV resistance in Capsicum spp.

引用

页码：89 / 94

页数：6

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