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United States Department of Agriculture

Agricultural Research Service

Research Project: POPULATION DYNAMICS AND DISEASE MANAGEMENT OF SOYBEAN ROOT PATHOGENS

Location: Crop Production and Pest Control Research

Title: Genetic mapping and characterization of two novel Phytophthora resistance genes from soybean landrace PI567139B

Authors
item Lin, Feng -
item Johnson, Austin -
item Ping, Jieqing -
item Zhao, Meixia -
item Abney, Scott -
item Vacant,
item Ma, Jianxin -

Submitted to: Midwest Soybean Conference Proceedings
Publication Type: Abstract Only
Publication Acceptance Date: August 12, 2012
Publication Date: N/A

Interpretive Summary: Phytophthora root and stem rot (PRR) disease, caused by P. sojae, is a widespread soybean disease resulting in an annual yield loss of $1~2 billion worldwide. To control the disease, breeders primarily employ race-specific resistant genes which are named Rps genes which have been identified to be located at 8 loci with 14 dominant alleles. However, soybean breeders are continuously facing big challenges due to the scarcity of excellent resistant genes and lack of efficient molecular markers for Marker Assisted Selection (MAS). Recently a soybean landrace PI567139B has been identified to confer excellent resistance to all major P.sojae races in Indiana soybean field and could provide potentially new resources of Rps genes. Genetic analysis revealed two dominant resistance genes and the resistance spectrum of each gene was characterized. Our results suggested that both of them were novel Rps genes.

Technical Abstract: Phytophthora root and stem rot (PRR) disease, caused by P. sojae, is a widespread soybean disease resulting in an annual yield loss of $1~2 billion worldwide. To control the disease, breeders primarily employ race-specific resistant genes which are named Rps genes which have been identified to be located at 8 loci with 14 dominant alleles. However, soybean breeders are continuously facing big challenges due to the scarcity of excellent resistant genes and lack of efficient molecular markers for Marker Assisted Selection (MAS). Recently a soybean landrace PI567139B has been identified to confer excellent resistance to all major P.sojae races in Indiana soybean field and could provide potentially new resources of Rps genes. Genetic analysis revealed two dominant resistance genes and the resistance spectrum of each gene was characterized. Our results suggested that both of them were novel Rps genes.

Last Modified: 10/24/2014
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