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Inheritance and Variation of Sensitivity to Metalaxyl in Phytophthora Sojae(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:
2009年02期
Page:
349-351
Research Field:
Publishing date:

Info

Title:
Inheritance and Variation of Sensitivity to Metalaxyl in Phytophthora Sojae
Author(s):
LIU Tong1; HOU Ju-mei2; ZUO Yu-hu3
1College of Plant Protection，Northwest A&F University，Yangling 712100，Shaanxi；
2Department of Biology and Chemical Engineering，Jingdezhen Comprehensive College,Jingdezhen 333000，Jiangxi；
3College of Plant Science and Technology，Heilongjiang August First Land Reclamation University，Daqing 163319，Heilongjiang，China
Keywords:
Phytophthora sojae; Metalaxyl; Sensitivity
PACS:
S43
DOI:
10.11861/j.issn.1000-9841.2009.02.0349
Abstract:
This paper was to investigate the inheritance and variation of sensitivity to metalaxyl in Phytophthora sojae.Five Phytophthora sojae strains of Ps411，Ps126，Ps223，Hs6，PsSD isolated from different regions and asexual and sexual progenies of Ps411-4 were used and their sensitivity to metalaxyl was evaluated by the ratio of the growth rates on carrot agar medium amended with 1.0 μgmL-1metalaxyl to the growth rates on the same medium without metalaxyl.The sensitivity of P．sojae to metalaxyl varied with their origins.The sensitivity of P．sojae to metalaxyl also steadily inherited in three successive zoospore progenies but showed obvious variation in first generation．In 50 single-oospore descendants，the restraint rate of metalaxyl to hypha ranged 70.2%~96.8%，with 5 higher，4 lower，and 41 similar to parent.Results indicate the sensitivity of P．sojae to metalaxyl inherited steadily in zoospor progenies while varied obviously in single-oospore generation，and the character of P．sojae could be controlled by nuclear heterozygous genes．

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