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Glycine canescens F. J. Herm., a Wild Relative of the Soybean 1
Author(s) -
Newell C. A.,
Hymowitz T.
Publication year - 1975
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1975.0011183x001500060044x
Subject(s) - powdery mildew , biology , botany , glycine , meiosis , anaphase , glycine soja , mitosis , subgenus , chromosome , genetics , horticulture , gene , taxonomy (biology) , amino acid
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 2 n = 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.