Abstract
A recessive partially sterile type of maize is reported to which has been given the narre variable sterile and the genetic symbol va. Variable sterile plants are characterized by lack of cytokinesis during the meiotic divisions of some of the microsporocytes. Accompanying the failure of cytoplasmic division, aberrant chromosome behavior often is observed. Presumably as a result of these aberrations in chromosome behavior, most if not all of the resulting 2n and 4n cells degenerate.Variable sterile plants produce, for the most part at least, diploid progeny indicating again that only the, haploid gametes are funetional.The va gene is located in the Bn-gl1-v5-ra chromosomes roughly 10 units to the left of gl1.
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Claims 6
Claim · model-written summary
Variable sterile maize is recessive and partially sterile.
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A recessive partially sterile type of maize is reported to which has been given the narre variable sterile and the genetic symbol va.”
Claim · model-written summary
Some microsporocytes in variable sterile plants lack cytokinesis during meiosis.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Variable sterile plants are characterized by lack of cytokinesis during the meiotic divisions of some of the microsporocytes.”
t0“Zea mays”
Claim · model-written summary
Failure of cytoplasmic division often accompanies aberrant chromosome behavior.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Accompanying the failure of cytoplasmic division, aberrant chromosome behavior often is observed.”
t0“Zea mays”
Claim · model-written summary
Most resulting 2n and 4n cells degenerate.
- Outcome
- 2n and 4n cells degeneratee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“most if not all of the resulting 2n and 4n cells degenerate.”
t0“Zea mays”
Claim · model-written summary
Variable sterile plants mostly produce diploid progeny.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Variable sterile plants produce, for the most part at least, diploid progeny”
t0“Zea mays”
Claim · model-written summary
The va gene maps roughly 10 units left of gl1 on Bn-gl1-v5-ra chromosomes.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The va gene is located in the Bn-gl1-v5-ra chromosomes roughly 10 units to the left of gl1.”
t0“Zea mays”