Abstract
Most plants of the Asgrow Mutable line of soybean (Glycine max [L.] Merr.) are chimeric for anthocyanin pimentation. This line carries an unstable recessive (“mutable”) allele of the w4 locus. The mutable allete reverts at high frequency from the recessive form to a stable dominant form. Nonrevertant flowers on mutable plants exhibit the near-white phenotype typical of plants homozygous recessive at the w4 locus. Mutable plants produce both entirely near-white and entirely purple flowers as well as flowers of a mutable phenotype with purple sectors on near-white petals. Similarly, hypocotyls of mutable plants have purple flecks and stripes on an otherwise green background. The size of revertant sectors on mutable plants is dependent on the developmental timing of reversion of the mutable allele. Germinal reversion of the mutable allele is evidenced by the production of wild-type progeny by mutable plants. Histological examination revealed that expression of anthocyanin genes in the flower and other plant parts is cell-layer-specific. It was therefore possible to detect periclinal chimeras that result from reversion in the independent cell layers. Different types of periclinal chimeras were used to demonstrate that the germ line in soybean is of subepidermal origin. The instability of the mutable allele may represent the first genetic evidence of a transposable element in soybean that has inserted at the w4 locus.
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Claims 12
Claim · model-written summary
Most Asgrow Mutable soybean plants were chimeric for anthocyanin pigmentation.
- Taxon
- soybean
Glycine maxe0 - Material
- Asgrow Mutablee0
- Outcome
- chimeric for anthocyanin pimentatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Most plants of the Asgrow Mutable line of soybean (Glycine max [L.] Merr.) are chimeric for anthocyanin pimentation.”
Claim · model-written summary
The soybean line carried an unstable recessive allele at w4.
- Taxon
- SoybeanGlycine maxt0
- Gene
- w4e0
- Outcome
- unstable recessive (“mutable”) allelee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This line carries an unstable recessive (“mutable”) allele of the w4 locus.”
t0“Soybean”
Claim · model-written summary
The mutable soybean allele reverted frequently to a stable dominant form.
- Taxon
- SoybeanGlycine maxt0
- Outcome
- reverts at high frequency from the recessive form to a stable dominant forme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The mutable allete reverts at high frequency from the recessive form to a stable dominant form.”
t0“Soybean”
Claim · model-written summary
Nonrevertant flowers were near white.
- Taxon
- SoybeanGlycine maxt0
- Organ / stage
- flowerse0
- Gene
- w4e0
- Outcome
- near-white phenotypee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nonrevertant flowers on mutable plants exhibit the near-white phenotype typical of plants homozygous recessive at the w4 locus.”
t0“Soybean”
Claim · model-written summary
Mutable soybean plants produced near-white, purple, and purple-sector flowers.
- Taxon
- SoybeanGlycine maxt0
- Organ / stage
- flowerse0
- Outcome
- entirely near-white and entirely purple flowers as well as flowers of a mutable phenotype with purple sectors on near-white petalse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mutable plants produce both entirely near-white and entirely purple flowers as well as flowers of a mutable phenotype with purple sectors on near-white petals.”
t0“Soybean”
Claim · model-written summary
Mutable soybean hypocotyls bore purple flecks and stripes on green.
- Taxon
- SoybeanGlycine maxt0
- Organ / stage
- hypocotylse0
- Outcome
- purple flecks and stripes on an otherwise green backgrounde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“hypocotyls of mutable plants have purple flecks and stripes on an otherwise green background.”
t0“Soybean”
Claim · model-written summary
Revertant sector size depended on developmental timing of allele reversion.
- Taxon
- SoybeanGlycine maxt0
- Organ / stage
- developmental timinge0
- Outcome
- size of revertant sectorse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The size of revertant sectors on mutable plants is dependent on the developmental timing of reversion of the mutable allele.”
t0“Soybean”
Claim · model-written summary
Mutable soybean plants produced wild-type progeny, indicating germinal reversion.
- Taxon
- SoybeanGlycine maxt0
- Outcome
- production of wild-type progenye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Germinal reversion of the mutable allele is evidenced by the production of wild-type progeny by mutable plants.”
t0“Soybean”
Claim · model-written summary
Anthocyanin gene expression was cell-layer-specific in soybean flowers and other parts.
- Taxon
- SoybeanGlycine maxt0
- Organ / stage
- flowere0
- Gene
- anthocyanin genese0
- Outcome
- cell-layer-specifice0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Histological examination revealed that expression of anthocyanin genes in the flower and other plant parts is cell-layer-specific.”
t0“Soybean”
Claim · model-written summary
Independent cell-layer reversion permitted detection of periclinal chimeras.
- Taxon
- SoybeanGlycine maxt0
- Outcome
- detect periclinal chimerase0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It was therefore possible to detect periclinal chimeras that result from reversion in the independent cell layers.”
t0“Soybean”
Claim · model-written summary
Periclinal chimeras showed that soybean germ line originates subepidermally.
- Taxon
- soybeanGlycine maxe0
- Outcome
- germ line in soybean is of subepidermal origine0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Different types of periclinal chimeras were used to demonstrate that the germ line in soybean is of subepidermal origin.”
Claim · model-written summary
The unstable allele may indicate a transposable element inserted at the soybean w4 locus.
- Taxon
- soybeanGlycine maxe0
- Gene
- w4e0
- Outcome
- first genetic evidence of a transposable elemente0
- Qualifier
- may represente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The instability of the mutable allele may represent the first genetic evidence of a transposable element in soybean that has inserted at the w4 locus.”