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This article in CS

  1. Vol. 37 No. 4, p. 1367-1369
     
    Received: Nov 12, 1996
    Published: July, 1997


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doi:10.2135/cropsci1997.0011183X003700040055x

Soybean Germplasm Resistant to Races 1 and 2 of Heterodera glycines

  1. A. P. Arelli ,
  2. J. A. Wilcox,
  3. O. Myers and
  4. P. T. Gibson
  1. Dep. of Agronomy, 117 Curtis Hall, Univ. of Missouri, Columbia, MO 65211-0001
    Southern Illinois Univ., Carbondale, IL 62901-0001

Abstract

Abstract

Heterodera glycines Ichinohe is a serious pest of soybean [Glycine max (L.) Merr.] in the USA. Several Races of H. glycines occur in the soybean growing areas. Soybean accessions with resistance to Races 3, 5, and 14 have been identified. Data on reaction of these accessions for Races 1 and 2 are not available. Our objective was to bioassay these accessions for resistance to H. glycines Races 1 and 2. Eighty-six accessions, host differentials, and susceptible control were bioassayed during 1995 to 1996 for each of the two Races in thermoregulated water baths in the greenhouse. The results indicated that 52 accessions had resistance to H. glycines Race 1, and 24 accessions had resistance to Race 2, respectively. Soybean PIs 89772, 90763, 404166, 404198A, 437654, 437690, 438489B, 567491A, and 567516C were either resistant or moderately resistant to both Races. These are potential resistance sources to H. glycines Races 1, and 2 for developing resistant soybean cultivars. These PI lines are being fingerprinted by means of molecular markers to identify the unique lines to allow broadening the diversity of resistance gene utilization.

Contribution of the Missouri Agric. Exp. Stn. Journal Series no. 12,517.

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