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Tytuł:
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QTLs for drought escape and tolerance identified in a set of random introgression lines of rice.
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Autorzy:
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Xu JL; Institute of Crop Sciences/National Key Facility for Crop Gene Resources and Genetic Improvement, Chinese Academy of Agricultural Sciences, 12 South Zhong-Guan-Cun Street, 100081 Beijing, China.
Lafitte HR
Gao YM
Fu BY
Torres R
Li ZK
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Źródło:
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TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik [Theor Appl Genet] 2005 Nov; Vol. 111 (8), pp. 1642-50. Date of Electronic Publication: 2005 Nov 10.
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Typ publikacji:
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Comparative Study; Journal Article; Research Support, Non-U.S. Gov't
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Język:
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English
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Imprint Name(s):
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Original Publication: Berlin, New York, Springer
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MeSH Terms:
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Chromosome Mapping*
Disasters*
Hybridization, Genetic*
Phenotype*
Quantitative Trait Loci*
Adaptation, Biological/*genetics
Oryza/*genetics
Analysis of Variance ; China ; Oryza/growth & development
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References:
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Theor Appl Genet. 2003 Dec;108(1):141-53. (PMID: 12961067)
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Plant Physiol. 2004 May;135(1):384-99. (PMID: 15122029)
Theor Appl Genet. 1995 Jun;90(7-8):969-81. (PMID: 24173051)
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Entry Date(s):
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Date Created: 20051004 Date Completed: 20060622 Latest Revision: 20181113
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Update Code:
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20240104
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DOI:
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10.1007/s00122-005-0099-8
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PMID:
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16200414
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A large set of 254 introgression lines in an elite indica genetic background were evaluated for grain yield (GY) and related traits under the irrigated (control) and drought (stress) conditions in two consecutive years for genetic dissection of adaptive strategies of rice to water stress. A total of 36 quantitative trait loci (QTLs) affecting heading date (HD), plant height (PH), GY and yield components were identified and most QTLs showed pronounced differential expression either qualitatively or quantitatively in response to drought. These QTLs could be grouped into three major types based on their behaviors under control and stress conditions. Type I included 12 QTLs that expressed under both the stress and non-stress conditions. Type II comprised 17 QTLs that expressed under irrigation but not under stress. Type III included seven QTLs that were apparently induced by stress. The observation that the Lemont (japonica) alleles at all HD QTLs except QHd5 resulted in early heading under stress appeared to be responsible for the putative adaptation of Lemont to drought by escaping, whereas the Teqing (indica) alleles at most PH/GY QTLs were consistently associated with increased yield potential and trait stability and thus contributed to DT. Our result that most DT QTLs were non-allelic with QTLs for drought escaping suggests that the two adaptive strategies in the parental lines are under possible negative regulation of two largely non-overlapping genetic systems.