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Resistance of Soybean Germplasm to Phytohpthora in Huanhuai Valley(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:
2008年03期
Page:
465-470
Research Field:
Publishing date:

Info

Title:
Resistance of Soybean Germplasm to Phytohpthora in Huanhuai Valley
Author(s):
SUN Shi1; ZHAO Jin-ming1; WU Xiaoling1; GUO Na1; WANG Yuan-chao2; GAI Jun-yi1; XING Han1
1Soybean Research Institute of Nanjing Agricultural University，National Center for Soybean Improvement，National Key Laboratory for Crop Genetics and Germplasm Enhancement；
2Key Laboratory of Monitoring and Management of Plant Diseases and Insects，Ministry of Agriculture，Nanjing Agricultural University，Nanjing 210095，Jiangsu，China
Keywords:
Soybean; Phytophthora root rot; P.sojae; Rps gene
PACS:
S565.1
DOI:
10.11861/j.issn.1000-9841.2008.03.0465
Abstract:
Phytophthora root rot caused by Phytophthora sojae is a destructive disease for soybeans [Glycine max(L.)Merr.] throughout the soybean production regions of world.Utilization of resistant varieties is the most economical and environmentally safe method for controlling disease.Ninty-six soybean cultivars or lines from Huanhuai valley were evaluated for their responses to 7 strains of P.sojae using the hypocotyls inoculation technique.The objectives of this study were to investigate the distribution and diversity of Phytophthora-resistant soybean and identify sources that confer resistance to multiple strains for implementation into breeding programs.Ninty-six cultivars or lines elicited 38 different reaction types with the 7 strains of the pathogen.Among them,four reaction types accorded to that of single gene，ten reaction types were consistent with two gene combinations，five reaction types were consistent with three gene combinations and the others were new reaction types.The number of cultivars，which probably carried gene Rps3a，Rps3b，Rps3c，Rps7，was 7，4，1，and 5，respectively.Some cultivars or lines possibly carry new Rps genes that are effective to control Phytophthora root rot of soybean in China.These accessions may provide sources of resistance for control of Phytophthora root rot in the future.Cluster analysis produced 8 groups at 0.691.The results are useful in grouping genetically related cultivars for soybean breeding to P.sojae control and to select parental germplasm with differential resistant gene.

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Last Update: 2014-10-08