The genetic interaction between non-nodulation and supernodulation in soybean: an example of developmental epistasis

Mathews, A., Carroll, B.J. and Gresshoff, P.M. (1990) The genetic interaction between non-nodulation and supernodulation in soybean: an example of developmental epistasis. Theoretical and Applied Genetics, 79 1: 125-130.


Author Mathews, A.
Carroll, B.J.
Gresshoff, P.M.
Title The genetic interaction between non-nodulation and supernodulation in soybean: an example of developmental epistasis
Journal name Theoretical and Applied Genetics   Check publisher's open access policy
ISSN 0040-5752
1432-2242
Publication date 1990-01
Sub-type Article (original research)
Volume 79
Issue 1
Start page 125
End page 130
Total pages 6
Place of publication Heidelberg, Germany
Publisher Springer
Language eng
Abstract The interaction between three non-nodulation mutants (nod49, nod772 and nod139) and a supernodulation mutant (nts382) of soybean was studied by analysing the progeny from crosses between these mutants. Previously it had been shown that the non-nodulation mutants arose from single mutation events and that nod49 and nod772 are allelic, whereas nod139 represents another gene required for nodulation. Analysis of progeny from crosses between nts382 and the wild type showed that this mutant also arose from a single mutation. Complementation tests demonstrated that the mutation responsible for supernodulation in nts382 is not allelic to either of these non-nodulation characters, and that it segregates independently. Progeny were identified that were homozygous for both supernodulation and non-nodulation, and these plants were incapable of nodulation. Thus, non-nodulation is epistatic over supernodulation and this is discussed in terms of the developmental blockage in the two mutant types. The identification and confirmation of these double mutants of the supernodulation and non-nodulation mutations are described. Although the non-nodulation mutations behave as recessive characters in a wild-type background, these mutations are incompletely dominant in a genetic background homozygous for supernodulation. The significance of these results to the understanding of nodule ontogeny is discussed.
Keyword Non-nodulation mutants
Supernodulation mutant
Epistasis
Autoregulation
Soybean
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Chemistry and Molecular Biosciences
 
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