Abstract
The interactive competence of the genes promoting lateral floret development in the successful Svalöf six-row variety ‘Agneta’ was studied. In this variety, genes for enhanced development of lateral florets occur not only at the six-row locus hex-v, but also at a recessive intermedium locus, int-c. Three int-c mutants, c5, c13, and c29, were crossed to ‘Agneta thus there was no dominant normal allele at int-c present in the crosses, whereas the hex-v locus would segregate for the normal and the six-row allelic states. F2 data for lateral floret characters (awn length, fertility, seed size) were contrasted to standards considered to provide the phenotypic spectra corresponding to the different genotypic constituents of the F2 segregations (two-row variety, VV CC; int-c mutants, Wcc; six-row mutant, vv CC; and six-rowed variety ‘Agneta’, vv cc). The analyses of observed data in relation to expectations on various hypotheses for interaction between hex-v and int-c led to the following main conclusions. The degrees of phenotypic enhancement may differ among characters of lateral floret development and among int-c mutant genes. There are no indications that the int-c allele present in ‘Agneta’ is the superior enhancer of the hex-v gene vA in this variety. Nor can we presume that vA is a superior six-row gene. Most probably, it would pay the efforts in a plant-breeding program with six-row barley to try various constellations of hex-v and int-c mutants.
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Claims 4
Claim · model-written summary
The int-c allele in Agneta is not indicated to be a superior enhancer of the hex-v gene vA.
- Taxon
- barley
.jpg?width=60)
Hordeum vulgaret0 - Material
- Agnetae1
- Gene
- hex-ve1
- Outcome
- superior enhancer of the hex-v gene vAe1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e1“There are no indications that the int-c allele present in ‘Agneta’ is the superior enhancer of the hex-v gene vA in this variety”
t0“a six-row variety of barley”
Claim · model-written summary
Degrees of phenotypic enhancement may differ among lateral floret characters and among int-c mutant genes.
- Taxon
- barleyHordeum vulgaret0
- Gene
- int-ce3
- Outcome
- degrees of phenotypic enhancemente3
- Qualifier
- among characters of lateral floret developmente3
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“The degrees of phenotypic enhancement may differ among characters of lateral floret development and among int-c mutant genes”
t0“a six-row variety of barley”
Claim · model-written summary
vA is not presumed to be a superior six-row gene.
- Taxon
- barleyHordeum vulgaret0
- Gene
- vAe2
- Outcome
- superior six-row genee2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Nor can we presume that vA is a superior six-row gene”
t0“a six-row variety of barley”
Claim · model-written summary
Breeders should try various combinations of hex-v and int-c mutants in six-row barley breeding.
Verbatim
e4“Most probably, it would pay the efforts in a plant-breeding program with six-row barley to try various constellations of hex-v and int-c mutants”