The Study on the Physiological Race Type and Biological Characteristics of Phytophthora capsici Collected from Different Regions

doi:10.7668/hbnxb.2015.02.019

Abstract

Abstract: In order to confirm the strain type and physiological race type of the pathogen causing Pepper blight and being collected from different regions, we utilized the morphological and molecular methods to identify the seven strains which were collected from Guangdong, Shanxi and Inner Mongolia as Phytophthora capsici Leonian.Through the comparison of biological characteristics of the seven strains from different regions, we found there were significant differences in colonial morphology, mycelial growth rate and sporulation ability.Through a set of the international differential hosts, we identified physiological race type of the seven strains, P1 which was from Guangdong belonged to Race 2, P2 to P7 which were collected from Shanxi and Inner Mongolia all belonged to Race 3.At present, there is no report of the physiological race type of P.capsici in Shanxi and Inner Mongolia, our research's results confirmed that the physiological race type of P.capsici in these two regions is Race 3.This results not only filled the vacancy in the research field of P.capsici, it would also lay a solid foundation for the resistance breeding against Pepper blight in the future.

Key words: Pepper blight, Phytophthora capsici Leonian, Physiological race type, Biological characteristics

CLC Number:

S641.3

YANG Shu-qing, HU Shuan-hong, YANG Zhi-gang, CHEN Cong, XU Xiao-mei, GAO Jing, WANG Yong, ZHAO Jun. The Study on the Physiological Race Type and Biological Characteristics of Phytophthora capsici Collected from Different Regions[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2015, 30(2): 104-109. doi: 10.7668/hbnxb.2015.02.019.

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