Abstract
M ahoney , D. L. J ules J anick , and E. C. S tevenson . (Purdue U., Lafayette, Ind.) Sex determination in diploid‐triploid crosses of Spinacia oleracea. Amer. Jour. Bot. 46(5): 372–375. 1959.—Segregation for sex in spinach was studied in a series of diploid pistillate × triploid staminate crosses. The genetic data indicated that the functional gametes from staminate triploids were not confined to n and n + 1 types. Cytological analyses of progenies from a number of 2 n ♀ × 3 n (XYY and XYY) ♂ crosses revealed similar but non‐homogeneous types of chromosome segregation. These crosses produced 49.3% diploids, 17.9% trisomies, 0.5% with 14 chromosomes, 1.2% with 16 chromosomes, 11.4% with 17 chromosomes, 18.9% triploids, and 0.8% with 19 chromosomes. The reciprocal crosses produced a higher percentage of aneuploid types including 1.7% with 15 chromosomes. Segregation for sex in each of the various chromosome numbered progeny of diploid‐triploid crosses was presented and analyzed.
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Claims 11
Claim · model-written summary
Functional gametes from staminate triploid spinach were not confined to n and n + 1 chromosome types.
- Taxon
- spinach
Spinacia oleraceae0 - Outcome
- functional gametes from staminate triploidse1
- Qualifier
- not confined to n and n + 1 typese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Segregation for sex in spinach”
e1“the functional gametes from staminate triploids were not confined to n and n + 1 types”
Claim · model-written summary
Cytological analyses revealed similar but non-homogeneous types of chromosome segregation in the progenies.
- Taxon
- spinachSpinacia oleraceae0
- Outcome
- types of chromosome segregatione2
- Qualifier
- similar but non‐homogeneouse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Segregation for sex in spinach”
e2“revealed similar but non‐homogeneous types of chromosome segregation”
Claim · model-written summary
Diploids made up 49.3% of the progeny of the crosses.
- Taxon
- spinachSpinacia oleraceae0
- Outcome
- diploidse1
- Value
- 49.3%e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Segregation for sex in spinach”
e1“49.3% diploids”
Claim · model-written summary
Trisomies made up 17.9% of the progeny of the crosses.
- Taxon
- spinachSpinacia oleraceae0
- Outcome
- trisomiese1
- Value
- 17.9%e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Segregation for sex in spinach”
e1“17.9% trisomies”
Claim · model-written summary
Progeny with 14 chromosomes made up 0.5% of the crosses.
- Taxon
- spinachSpinacia oleraceae0
- Outcome
- with 14 chromosomese1
- Value
- 0.5%e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Segregation for sex in spinach”
e1“0.5% with 14 chromosomes”
Claim · model-written summary
Progeny with 16 chromosomes made up 1.2% of the crosses.
- Taxon
- spinachSpinacia oleraceae0
- Outcome
- with 16 chromosomese1
- Value
- 1.2%e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Segregation for sex in spinach”
e1“1.2% with 16 chromosomes”
Claim · model-written summary
Progeny with 17 chromosomes made up 11.4% of the crosses.
- Taxon
- spinachSpinacia oleraceae0
- Outcome
- with 17 chromosomese1
- Value
- 11.4%e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Segregation for sex in spinach”
e1“11.4% with 17 chromosomes”
Claim · model-written summary
Triploids made up 18.9% of the progeny of the crosses.
- Taxon
- spinachSpinacia oleraceae0
- Outcome
- triploidse1
- Value
- 18.9%e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Segregation for sex in spinach”
e1“18.9% triploids”
Claim · model-written summary
Progeny with 19 chromosomes made up 0.8% of the crosses.
- Taxon
- spinachSpinacia oleraceae0
- Outcome
- with 19 chromosomese1
- Value
- 0.8%e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Segregation for sex in spinach”
e1“0.8% with 19 chromosomes”
Claim · model-written summary
The reciprocal crosses produced a higher percentage of aneuploid progeny.
- Taxon
- spinachSpinacia oleraceae0
- Outcome
- percentage of aneuploid typese1
- Direction
- highere1
- Qualifier
- reciprocal crossese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Segregation for sex in spinach”
e1“The reciprocal crosses produced a higher percentage of aneuploid types”
Claim · model-written summary
Progeny with 15 chromosomes made up 1.7% of the reciprocal crosses.
- Taxon
- spinachSpinacia oleraceae0
- Outcome
- with 15 chromosomese1
- Value
- 1.7%e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Segregation for sex in spinach”
e1“1.7% with 15 chromosomes”