Abstract
Drought stress has become more important abiotic factor affecting rice yield under present changing climate conditions. IR58025B is a maintainer line of widely used WA CMS line IR58025A and widely used in commercial rice hybrids production in India. Most of the rice hybrids are released for the irrigated ecosystem consequently, these derived hybrids suffer drastic yield decline under moisture stress conditions. To facilitate the efficient use of complex polygenic traits in hybrid rice molecular breeding research, we undertook development of introgression lines in background of IR58025B with tolerance to moisture stress by introgression of major QTL qDTY3.1 controlling grain yield under moisture stress. The present study reports the development and evaluation of 230 introgression lines (BC2F2) lines in IR58025B background for improvement of grain yield under moisture stress condition. Among 230 ILs, 24 introgression lines were found positive for qDTY3.1 and negative for fertility restoration (rf4 & rf3).Promising BILs exhibited earliness of 7 days under moisture stress with grain yield advantage of 8.54g to 10.78g in comparison to the recurrent parent. This suggested that the efficacy of introgressed drought tolerant QTL qDTY3.1 in enhancing grain yield under moisture stress conditions. Further, breeding lines of IR58025B possessing qDTY3.1 could also serve as good donors for development of drought tolerant rice hybrids for unfavorable ecologies.
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Claims 6
Claim · model-written summary
Of 230 introgression lines, 24 were positive for qDTY3.1 and negative for rf4 and rf3.
- Taxon
- rice
Oryza sativat0 - Gene
- qDTY3.1e1
- Outcome
- introgression lines were found positive for qDTY3.1e1
- Value
- 24e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“hybrid rice”
e1“Among 230 ILs, 24 introgression lines were found positive for qDTY3.1 and negative for fertility restoration (rf4 & rf3)”
Claim · model-written summary
Promising BILs exhibited earliness of 7 days under moisture stress.
- Taxon
- riceOryza sativat0
- Material
- Promising BILse3
- Treatment
- moisture stresse3
- Outcome
- earlinesse3
- Value
- 7 dayse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“hybrid rice”
e3“Promising BILs exhibited earliness of 7 days under moisture stress with grain yield advantage of 8.54g to 10.78g in comparison to the recurrent parent”
Claim · model-written summary
Promising BILs gave a grain yield advantage of 8.54g to 10.78g over the recurrent parent under moisture stress.
- Taxon
- riceOryza sativat0
- Material
- Promising BILse3
- Treatment
- moisture stresse3
- Outcome
- grain yielde3
- Direction
- advantagee3
- Value
- 8.54g to 10.78ge3
- Comparator
- recurrent parente3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“hybrid rice”
e3“Promising BILs exhibited earliness of 7 days under moisture stress with grain yield advantage of 8.54g to 10.78g in comparison to the recurrent parent”
Claim · model-written summary
Introgressed qDTY3.1 is suggested to enhance grain yield under moisture stress.
- Taxon
- riceOryza sativat0
- Treatment
- introgressed drought tolerant QTL qDTY3.1e4
- Gene
- qDTY3.1e4
- Outcome
- grain yielde4
- Direction
- enhancinge4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“hybrid rice”
e4“This suggested that the efficacy of introgressed drought tolerant QTL qDTY3.1 in enhancing grain yield under moisture stress conditions”
Claim · model-written summary
IR58025B breeding lines possessing qDTY3.1 could serve as donors for drought tolerant rice hybrids.
- Taxon
- riceOryza sativat0
- Material
- breeding lines of IR58025Be5
- Gene
- qDTY3.1e5
- Outcome
- good donors for development of drought tolerant rice hybridse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“hybrid rice”
e5“breeding lines of IR58025B possessing qDTY3.1 could also serve as good donors for development of drought tolerant rice hybrids for unfavorable ecologies”
Claim · model-written summary
Development and evaluation of 230 introgression lines in the IR58025B background.
Verbatim
e6“The present study reports the development and evaluation of 230 introgression lines (BC2F2) lines in IR58025B background for improvement of grain yield under moisture stress condition”
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See all 325 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.