Genetic Analysis of 4 New Mutants at the Unstable k2 Mdh l-n y20 Chromosomal Region in Soybean.
In: Journal of Heredity, Jg. 97 (2006-07-01), Heft 4, S. 423-427
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Zugriff:
In soybean (Glycine max (L.) Merr.), a chromosomal region defined by 3 closely linked loci, k2 (tan-saddle seed coat), Mdb1-n (malate dehydrogenase 1 null), and y20 (yellow foliage), is highly mutable. A total of 31 mutants have been reported from this region. In this study, a mutation with tan-saddle seed coat was found from bulk-harvested seed of cultivar Kenwood, Genetic analysis established that dais tan-saddle seed coat mutation is allelic to the k2 locus and inherited as a recessive gene. Simple sequence repeat analysis showed that this mutant is not a contaminant from other existing k2 mutants. The mutant was named Kenwood-k2. To lest for genetic instability at the k2 Mdb1-n y20 chromosomal region, Kenwood-k2 was crossed reciprocally with cultivars Harosoy and Williams. No new mutants were found in F2 families, in the ,frenetic instability tests of T239 (k2) with cultivar Williams, 3 new mutants with yellow foliage (y20) and malate dehydrogenase 1 null (Mdb1-n) were identified. In the genetic instability tests of T261 (k2 Mdb1-n) with cultivar Williams, no new mutants were found. The Kenwood-k2 and the 3 yellow-foliage, malate dehydrogenase 1-null mutants provide additional genetic materials to study chromosomal aberrations in this mutable/unstable chromosomal region. [ABSTRACT FROM AUTHOR]
Titel: |
Genetic Analysis of 4 New Mutants at the Unstable k2 Mdh l-n y20 Chromosomal Region in Soybean.
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Autor/in / Beteiligte Person: | Xu, Min ; Palmer, Reid G. |
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Zeitschrift: | Journal of Heredity, Jg. 97 (2006-07-01), Heft 4, S. 423-427 |
Veröffentlichung: | 2006 |
Medientyp: | academicJournal |
ISSN: | 0022-1503 (print) |
DOI: | 10.1093/jhered/es1015 |
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