Identification of Resistance to Four Pythium Species in Soybean Cultivars(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:

2010年06期

Page:

971-975

Research Field:

Publishing date:

Info

Title:

Identification of Resistance to Four Pythium Species in Soybean Cultivars

Author(s):

WEI Lai¹; LI Wen-bin¹; HAN Ying-peng¹;  TANG Xiao-fei²;  LOU Bing-gan³

1.Key Laboratory of National Education Department, Soybean Research Institute, Northeast Agricultural University, Harbin 150030, Heilongjiang;

2. Soybean Research Institute of Heilongjiang Academy of Agricultural Sciences, Harbin 150086, Heilongjiang;

3. Institute of Biotechnology, Zhejiang University, Hangzhou 310029， Zhejiang, China

Keywords:

Soybean;  Pythium;  Resistance identification

PACS:

S565.1

DOI:

10.11861/j.issn.1000-9841.2010.06.0971

Abstract:

Pythium is an important pathogenic fungi to many plants, and Pythium root rot is found in all soybean-producing regions of the world. However, only a few cultivars are known as resistant to Pythium. Screening resistant germplasm is the premise for soybean Pythium resistant breeding. Seed rot (SR) test were used to identify the resistance of 83 soybean cultivars to four Pythium species respectively. Results showed that there are cultivars which have resistance to one kind of Pythium, and there also have cultivars which have resistance to two or three kinds of Pythium. In this test, four cultivars had been identified to have resistance to four kinds of Pythium. Numbers of resistant cultivars to each Pythium varied greatly, 19, 34, 12 and 32 ones were resistant to P. aphanidermatum, P. sylvaticum, P. irregulare and P. ultimum, accounting for 22.3%, 41.0%,14.5% and 38.6% of tested cultivars, respectively. Among all cultivars in the test, twenty ones were found resistant to both P.sylvaticun and P.ultimum, accounting for 24.1% of the total. All these results suggest there existing Pythium resistant soybean germplasm in Heilongjiang Province.

References:

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