Abstract
The spontaneous fasciation mutation generates novel developmental diversity in cultivated soybean, Glycine max (L.) Merrill. An increased apical dominance in the mutant inhibits axillary buds, causes a branchless phenotype, and restricts reproduction to shoot apices. The fasciation mutation is encoded by a recessive (f) allele at a single locus. The mutation, despite its importance in soybean development, has no locus assignment on previously reported molecular maps of soybean. A population of 70 F(2) progeny was derived from a cross between 'Clark 63' and the fasciation mutant. More than 700 molecular markers (amplified restriction fragment length polymorphisms [AFLPs], random amplified polymorphic DNAs [RAPDs], restriction fragment length polymorphisms [RFLPs], and simple sequence repeats [SSRs]) were used in mapping of the fasciation phenotype. Twenty linkage groups (LGs) corresponding to the public soybean molecular map are represented on the Clark 63 × fasciation mutant molecular map that spans 3050 centimorgans (cM). The f locus was mapped on LG D1b+W and linked with two AFLPs and four SSR markers (Satt005, Satt141, Satt600, and Satt703). No linkage was found between the f locus and several cDNA polymorphic loci between the wild type and the mutant. The known map position of the f locus and demonstration of the mutant phenotype from early postembryonic throughout reproductive stages provide an excellent resource for investigations of molecular mechanisms affecting soybean ontogeny.
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Claims 6
Claim · model-written summary
The fasciation mutant had greater apical dominance, inhibited axillary buds, no branches and reproduction at shoot apices.
- Outcome
- increased apical dominance in the mutant inhibits axillary buds, causes a branchless phenotype, and restricts reproduction to shoot apicese0
Not reportedTaxon
Verbatim
e0“An increased apical dominance in the mutant inhibits axillary buds, causes a branchless phenotype, and restricts reproduction to shoot apices.”
Claim · model-written summary
The fasciation mutation was encoded by a recessive f allele at one locus.
Not reportedTaxon
Verbatim
e0“The fasciation mutation is encoded by a recessive (f) allele at a single locus.”
Claim · model-written summary
The soybean map represented 20 linkage groups and spanned 3050 cM.
Not reportedTaxon
Verbatim
e0“Twenty linkage groups (LGs) corresponding to the public soybean molecular map are represented on the Clark 63 × fasciation mutant molecular map that spans 3050 centimorgans (cM).”
Claim · model-written summary
The f locus mapped to LG D1b+W and linked to two AFLPs and four SSR markers.
Not reportedTaxon
Verbatim
e0“The f locus was mapped on LG D1b+W and linked with two AFLPs and four SSR markers (Satt005, Satt141, Satt600, and Satt703).”
Claim · model-written summary
No linkage was found between f and several cDNA polymorphic loci.
Not reportedTaxon
Verbatim
e0“No linkage was found between the f locus and several cDNA polymorphic loci between the wild type and the mutant.”
Claim · model-written summary
The mutant phenotype was demonstrated from early postembryonic through reproductive stages.
Not reportedTaxon
Verbatim
e0“demonstration of the mutant phenotype from early postembryonic throughout reproductive stages”