Abstract
Detailed cytological studies have been made on Coix gigantea which often occurs as a weed in paddy fields of South India. This cyto-type shows the aneuploid chromosome numbers of n=6 and 2n=12. All the six bivalents are homologous showing complete pairing during meiosis. The pachytene studies show significant similarities between the IInd and Vth pair of chromosomes. The Ist and VIth pair show terminal knobs. The cytological evidence indicates the relationship of this cyto-type (2n=12) with the other cyto-types of C. gigantea, but its origin is obscure. This plant could survive in the paddy fields as it exhibits mimicry together with a short life-cycle. A wide collection fom different regions of South India and detailed cytological analysis might help us to understand its phylogenetic relationships.
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Claims 6
Claim · model-written summary
This Coix gigantea cyto-type has aneuploid chromosome numbers of n=6 and 2n=12.
- Taxon
- Coix gigantea
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Polytoca giganteae0 - Material
- cyto-typee1
- Outcome
- aneuploid chromosome numberse1
- Value
- n=6 and 2n=12e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Coix gigantea which often occurs as a weed in paddy fields of South India”
e1“This cyto-type shows the aneuploid chromosome numbers of n=6 and 2n=12”
Claim · model-written summary
All six bivalents are homologous and show complete pairing during meiosis.
- Taxon
- Coix giganteaPolytoca giganteae0
- Outcome
- complete pairing during meiosise2
- Qualifier
- six bivalentse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Coix gigantea which often occurs as a weed in paddy fields of South India”
e2“All the six bivalents are homologous showing complete pairing during meiosis”
Claim · model-written summary
The IInd and Vth chromosome pairs show significant similarities in pachytene morphology.
- Taxon
- Coix giganteaPolytoca giganteae0
- Outcome
- significant similarities between the IInd and Vth pair of chromosomese3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Coix gigantea which often occurs as a weed in paddy fields of South India”
e3“The pachytene studies show significant similarities between the IInd and Vth pair of chromosomes”
Claim · model-written summary
The Ist and VIth chromosome pairs show terminal knobs.
- Taxon
- Coix giganteaPolytoca giganteae0
- Outcome
- terminal knobse4
- Qualifier
- Ist and VIth paire4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Coix gigantea which often occurs as a weed in paddy fields of South India”
e4“The Ist and VIth pair show terminal knobs”
Claim · model-written summary
The cytological evidence suggests a relationship of this cyto-type with other Coix gigantea cyto-types, but its origin is obscure.
- Taxon
- Coix giganteaPolytoca giganteae0
- Outcome
- the relationship of this cyto-type (2n=12) with the other cyto-typese5
- Qualifier
- its origin is obscuree5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Coix gigantea which often occurs as a weed in paddy fields of South India”
e5“The cytological evidence indicates the relationship of this cyto-type (2n=12) with the other cyto-types of C. gigantea, but its origin is obscure”
Claim · model-written summary
The plant could survive in paddy fields because of mimicry together with a short life-cycle.
- Taxon
- Coix giganteaPolytoca giganteae0
- Outcome
- survive in the paddy fieldse6
- Qualifier
- mimicry together with a short life-cyclee6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Coix gigantea which often occurs as a weed in paddy fields of South India”
e6“This plant could survive in the paddy fields as it exhibits mimicry together with a short life-cycle”