Abstract
Cytological studies were conducted on microsporogenesis and male gametophyte development of a synthetic amphidiploid species (Cucumis hytivus Chen et Kirkbride) using chromosome preparation.During microsporogenesis,the result indicated that about 31% of pollen mother cells (PMCs) had chromosome configuration with 19Ⅱ,and about 69% of PMCs had complex chromosome configurations (average configuration 0.41Ⅰ+14.69Ⅱ+0.06Ⅲ+0.93Ⅳ+0.62Ⅵ+0.07Ⅷ).About 8.78% of tetrads were observed,while the rest were polyads at the tetrad stage.During male gametophyte development,about 10% microspores developed into normal two-celled pollens with three apertures,and 90% were aborted.Additionally,special phenomenon were also observed such as genome separation at anaphase Ⅱ and pollen aberration in morphology.
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Claims 8
Claim · model-written summary
About 31% of pollen mother cells had a 19Ⅱ chromosome configuration.
Verbatim
e0“about 31% of pollen mother cells (PMCs) had chromosome configuration with 19Ⅱ”
Claim · model-written summary
About 69% of pollen mother cells had complex chromosome configurations.
- Taxon
- Cucumis hytivusCucumis ×hytivust0
- Outcome
- complex chromosome configurationse0
- Value
- 69%e0
- Qualifier
- average configuration 0.41Ⅰ+14.69Ⅱ+0.06Ⅲ+0.93Ⅳ+0.62Ⅵ+0.07Ⅷe0
Verbatim
e0“about 69% of PMCs had complex chromosome configurations (average configuration 0.41Ⅰ+14.69Ⅱ+0.06Ⅲ+0.93Ⅳ+0.62Ⅵ+0.07Ⅷ)”
t0“Cucumis hytivus”
Claim · model-written summary
About 8.78% of products were tetrads at the tetrad stage.
- Taxon
- Cucumis hytivusCucumis ×hytivust0
- Organ / stage
- tetrad stagee0
- Outcome
- tetradse0
- Value
- 8.78%e0
Verbatim
e0“About 8.78% of tetrads were observed,while the rest were polyads at the tetrad stage”
t0“Cucumis hytivus”
Claim · model-written summary
The remaining products were polyads at the tetrad stage.
- Taxon
- Cucumis hytivusCucumis ×hytivust0
- Organ / stage
- tetrad stagee0
- Outcome
- polyadse0
Verbatim
e0“About 8.78% of tetrads were observed,while the rest were polyads at the tetrad stage”
t0“Cucumis hytivus”
Claim · model-written summary
About 10% of microspores developed into normal two-celled pollen with three apertures.
- Taxon
- Cucumis hytivusCucumis ×hytivust0
- Organ / stage
- microsporese0
- Outcome
- normal two-celled pollens with three aperturese0
- Value
- 10%e0
Verbatim
e0“about 10% microspores developed into normal two-celled pollens with three apertures”
t0“Cucumis hytivus”
Claim · model-written summary
About 90% of microspores were aborted.
- Taxon
- Cucumis hytivusCucumis ×hytivust0
- Outcome
- abortede0
- Value
- 90%e0
Verbatim
e0“90% were aborted”
t0“Cucumis hytivus”
Claim · model-written summary
Genome separation at anaphase Ⅱ was observed.
- Taxon
- Cucumis hytivusCucumis ×hytivust0
- Outcome
- genome separation at anaphase Ⅱe0
Verbatim
e0“genome separation at anaphase Ⅱ”
t0“Cucumis hytivus”
Claim · model-written summary
Pollen morphology was aberrant.
- Taxon
- Cucumis hytivusCucumis ×hytivust0
- Outcome
- pollen aberration in morphologye0
Verbatim
e0“pollen aberration in morphology”
t0“Cucumis hytivus”