Abstract
Heat tolerance is a physiologically and genetically complex trait regulated by multiple genes. To investigate the genetic basis of heat tolerance, eight parents (five lines and three testers) and their fifteen F1 hybrids were evaluated under normal and high-temperature stress conditions for two consecutive years. Data were recorded for plant height, number of bolls, boll weight, seed cotton yield, ginning out turn (GOT%), H2O2, catalase, peroxidase, super-oxidase dismutase, total soluble proteins, carotenoids, chlorophyll a & b contents, short fiber index, fiber strength, UHML, micronaire value, reflectance, and uniformity index. Line × tester analysis suggested that the contribution of lines was higher than testers. Non-additive gene action was observed for all studied traits. The variances of SCA were greater than GCA variances for all studied traits revealed that these traits were governed by a few largely dominant genes. Fb-Shaheen, Eagle-2 and JSQ White Gold were found good general combiner whereas the cross Fb-Shaheen × JSQ White Gold was a good specific combiner and revealed significant better parent heterosis for most of the traits during two years under normal and high temperature stress conditions. The information obtained could be utilized in a breeding program for the development of new synthetic varieties of heat tolerance.
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Claims 8
Claim · model-written summary
In the line x tester analysis the contribution of lines was higher than that of testers.
- Taxon
- Gossypium hirsutum
Gossypium hirsutumt0 - Outcome
- contribution of linese0
- Direction
- highere0
- Comparator
- testerse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Gossypium hirsutum L.”
e0“Line × tester analysis suggested that the contribution of lines was higher than testers”
Claim · model-written summary
Non-additive gene action was observed for all studied traits.
- Taxon
- Gossypium hirsutumGossypium hirsutumt0
- Outcome
- Non-additive gene actione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Gossypium hirsutum L.”
e0“Non-additive gene action was observed for all studied traits”
Claim · model-written summary
SCA variances were greater than GCA variances for all studied traits.
- Taxon
- Gossypium hirsutumGossypium hirsutumt0
- Outcome
- variances of SCAe0
- Direction
- greatere0
- Comparator
- GCA variancese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Gossypium hirsutum L.”
e0“The variances of SCA were greater than GCA variances for all studied traits”
Claim · model-written summary
The authors conclude that the traits were governed by a few largely dominant genes.
- Taxon
- Gossypium hirsutumGossypium hirsutumt0
- Gene
- a few largely dominant genese0
- Outcome
- traitse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Gossypium hirsutum L.”
e0“these traits were governed by a few largely dominant genes”
Claim · model-written summary
Fb-Shaheen, Eagle-2 and JSQ White Gold were good general combiners.
- Taxon
- Gossypium hirsutumGossypium hirsutumt0
- Material
- Fb-Shaheen, Eagle-2 and JSQ White Golde0
- Outcome
- good general combinere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Gossypium hirsutum L.”
e0“Fb-Shaheen, Eagle-2 and JSQ White Gold were found good general combiner”
Claim · model-written summary
The cross Fb-Shaheen x JSQ White Gold was a good specific combiner.
- Taxon
- Gossypium hirsutumGossypium hirsutumt0
- Material
- Fb-Shaheen × JSQ White Golde0
- Outcome
- good specific combinere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Gossypium hirsutum L.”
e0“the cross Fb-Shaheen × JSQ White Gold was a good specific combiner”
Claim · model-written summary
The cross Fb-Shaheen x JSQ White Gold showed significant better-parent heterosis for most traits over two years under normal and high temperature stress conditions.
- Taxon
- Gossypium hirsutumGossypium hirsutumt0
- Material
- Fb-Shaheen × JSQ White Golde0
- Outcome
- better parent heterosise0
- Qualifier
- most of the traits during two years under normal and high temperature stress conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Gossypium hirsutum L.”
e0“the cross Fb-Shaheen × JSQ White Gold was a good specific combiner and revealed significant better parent heterosis for most of the traits during two years under normal and high temperature stress conditions”
Claim · model-written summary
The authors state that the information could be used in a breeding program to develop new synthetic varieties with heat tolerance.
- Taxon
- Gossypium hirsutumGossypium hirsutumt0
- Outcome
- development of new synthetic varieties of heat tolerancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Gossypium hirsutum L.”
e0“The information obtained could be utilized in a breeding program for the development of new synthetic varieties of heat tolerance”