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This article in CS

  1. Vol. 15 No. 6, p. 879-881
     
    Received: May 21, 1975


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doi:10.2135/cropsci1975.0011183X001500060044x

Glycine canescens F. J. Herm., a Wild Relative of the Soybean1

  1. C. A. Newell and
  2. T. Hymowitz2

Abstract

Abstract

An accession of Glycine canescens F. J. Herm was studied with respect to morphological, cytological, and chemical characteristics. This species, a wild relative of cultivated soybeans G. max (L.) Merr., was collected near Alice Springs, Northern Territory, Australia and has not previously been available in the United States for examination.

Morphologically the accession did not conform unequivocally to the published description of the species, possibly due partly to greenhouse growth conditions. Also, one accession should not be considered representative of the species as a whole. Scanning electron microscopy was employed to investigate external characteristics of seed and leaf surfaces. Cytological analysis of mitosis and meiosis gave a chromosome number of 2n = 40, with regular bivalent formation at diakinesis. Chemical characteristics such as seed oil, protein, and fatty acid content fell within the range previously determined for the subgenus. Preliminary screening of wild Glycine species for disease resistance suggested that G. canescens was resistant to powdery mildew, Microsphaera diffusa Cke. and Pk.

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