Genetic Analysis of Resistance toPhytophthoraRoot Rot in Tomato (Lycopersicon esculentumMill.)
作者:
E. Kozik,
M. R. Foolad,
R. A. Jones,
期刊:
Plant Breeding
(WILEY Available online 1991)
卷期:
Volume 106,
issue 1
页码: 27-32
ISSN:0179-9541
年代: 1991
DOI:10.1111/j.1439-0523.1991.tb00475.x
出版商: Blackwell Publishing Ltd
关键词: Lycopersicon esculentum;Phytophthora parasitica;disease resistance;quantitative inheritance
数据来源: WILEY
摘要:
AbstractThe resistant accession, LA1312, and the susceptible cultivar ‘Peto 343′, were crossed to develop F1, F2and BC1populations for genetic analysis of resistance in tomatoes toPhytophthora parasiticaDastur, the causal agent of Phytophthora root rot. There was no maternal effect on resistance. Generation means analysis indicated that tolerance to Phytophthora root rot was under genetic control with both simple (additive and dominance) and digenic interaction (additive × additive and additive × dominance) effects contributing to the total genetic variation among generation means. Weighted least square regression analysis indicated that the majority (ca. 96 %) of the genetic variation could be explained by simple additive effects alone. Narrow sense heritability was estimated as 0.22. Based on effective factor formulae, at least five effective factors controlled the resistance. Implications for breeding procedures are disc
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