Theoretical and Applied Genetics

, Volume 84, Issue 5–6, pp 600–607 | Cite as

Inheritance of two independent isozyme variants in soybean plants derived from tissue culture

  • L. A. Amberger
  • R. C. Shoemaker
  • R. G. Palmer
Article
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Summary

Soybean [Glycine max (L.) Merr.] plants were regenerated via somatic embryogenesis from nine soybean cultivars. Our objective was to identify and characterize genetically novel mutations that would further our understanding of the soybean genome. Variant isozyme patterns were observed in two independent tissue culturederived lines. Genetic analyses were conducted on these two isozyme variants, and they were heritable. No variant isozyme patterns were evident in control (parental) soybean lines. In the cultivar BSR 101, a mutation of Aco2-b (aconitase) to a null allele was detected. The Aco2-bn mutant, Genetic Type T318, had not been previously observed in soybean. In the Chinese cultivar Jilin 3 (PI 427.099), a chlorophyll-deficient plant was identified that also lacked two mitochondrial malate-dehydrogenase (Mdh null) isozyme bands. These two mutant phenotypes, chlorophyll-deficient and Mdh null, were found to cosegregate. The Jilin 3 mutant, Mdh1-n (Ames 1) y20 (Ames 1) Genetic Type T317, was allelic to three chlorophyll-deficient, Mdh1 null mutants [Mdh1-n (Ames 2) y20 (Ames 2) (T323), Mdh1-n (Ames 3) y20 (Ames 3) (T324), and Mdh1-n (Ames 4) y20 (Ames 4) (T325)] previously identified from a transposon-containing soybean population, and to a chlorophyll-deficient, Mdh1 null mutant [Mdh1-n (Urbana) y20 (Urbana) k2, Genetic Type T253] which occurred spontaneously in soybean. The recovery of two isozyme variants from progeny of 185 soybean plants regenerated from somatic embryogenesis indicates the feasibility of selection for molecular variants.

Key words

Somaclonal variation Tissue culture Glycine max (L.) Merr. Isozymes 
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Copyright information

© Springer-Verlag 1992

Authors and Affiliations

  • L. A. Amberger
    • 1
  • R. C. Shoemaker
    • 1
  • R. G. Palmer
    • 1
  1. 1.United States Department of Agriculture-Agricultural Research Service, Field Crops Research Unit, and Departments of Agronomy and Zoology/GeneticsIowa State UniversityAmesUSA

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