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Virulence in Meloidogyne hapla differentiated by resistance in common bean (Phaseolus vulgaris)

Virulence in Meloidogyne hapla differentiated by resistance in common bean (Phaseolus vulgaris) AbstractA diverse collection of seven Meloidogyne hapla isolates, all identified ascytological race A, were studied for their host-parasite interactions withseveral common bean (Phaseolus vulgaris L.) genotypes. The M. hapla isolatesshowed significant (P < 0.01) differential interactions of ability toreproduce on resistant common bean cultivars. Based on the nematode egg massproduction on susceptible cv. Yolano and resistant cv. NemaSnap beans, theisolates formed three groups. Four isolates produced many egg masses on bothsusceptible and resistant cultivars and were defined as virulent toresistance in cv. NemaSnap. Two isolates produced many egg mass numbers onsusceptible cv. Yolano, but very few on resistant cv. NemaSnap, and weredefined as avirulent to the resistance in NemaSnap. One isolate, WI,produced fewer egg masses on susceptible cv. Yolano than on resistant cv.Nemasnap and was defined as virulent to resistance in cv. NemaSnap. Thethree types of host-parasite interaction indicated a transagonal reactionfor a gene-for-gene relationship between M. hapla and resistant common bean(cv. NemaSnap). Analysis of an F2 population from crosses between cultivarsNemaSnap and Yolano revealed a single dominant gene pattern of segregationfor a major form of resistance in cv. NemaSnap. According to an allelismtest, the resistance to M. hapla in cv. NemaSnap was not derived from theline PI165426, which is the pedigree source of M. incognita resistance incv. NemaSnap. However, PI165426 was found to have M. hapla resistance butmay not be homozygous for these factors. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Nematology Brill

Virulence in Meloidogyne hapla differentiated by resistance in common bean (Phaseolus vulgaris)

Nematology , Volume 5 (1): 9 – Jan 1, 2003

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Publisher
Brill
Copyright
Copyright © Koninklijke Brill NV, Leiden, The Netherlands
ISSN
1388-5545
eISSN
1568-5411
DOI
10.1163/156854102765216678
Publisher site
See Article on Publisher Site

Abstract

AbstractA diverse collection of seven Meloidogyne hapla isolates, all identified ascytological race A, were studied for their host-parasite interactions withseveral common bean (Phaseolus vulgaris L.) genotypes. The M. hapla isolatesshowed significant (P < 0.01) differential interactions of ability toreproduce on resistant common bean cultivars. Based on the nematode egg massproduction on susceptible cv. Yolano and resistant cv. NemaSnap beans, theisolates formed three groups. Four isolates produced many egg masses on bothsusceptible and resistant cultivars and were defined as virulent toresistance in cv. NemaSnap. Two isolates produced many egg mass numbers onsusceptible cv. Yolano, but very few on resistant cv. NemaSnap, and weredefined as avirulent to the resistance in NemaSnap. One isolate, WI,produced fewer egg masses on susceptible cv. Yolano than on resistant cv.Nemasnap and was defined as virulent to resistance in cv. NemaSnap. Thethree types of host-parasite interaction indicated a transagonal reactionfor a gene-for-gene relationship between M. hapla and resistant common bean(cv. NemaSnap). Analysis of an F2 population from crosses between cultivarsNemaSnap and Yolano revealed a single dominant gene pattern of segregationfor a major form of resistance in cv. NemaSnap. According to an allelismtest, the resistance to M. hapla in cv. NemaSnap was not derived from theline PI165426, which is the pedigree source of M. incognita resistance incv. NemaSnap. However, PI165426 was found to have M. hapla resistance butmay not be homozygous for these factors.

Journal

NematologyBrill

Published: Jan 1, 2003

Keywords: AVIRULENCE; ROOT-KNOT NEMATODE; GENE-FOR GENE INTERACTION

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