NDLI: Quantitative trait loci linked to plant production traits in rice ( Oryza sativa ) under drought stress in a target environment

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Quantitative trait loci linked to plant production traits in rice ( Oryza sativa ) under drought stress in a target environment

Content Provider	Semantic Scholar
Author	Bijia, Kanjivavila Raghavan Jeyaprakashb, Paramasivam Ganeshc, Siruthaiyur Krishnamoorthy Senthila, Alagarswamy Babud, Ranganathan Chandra
Copyright Year	2008
Abstract	Drought stress is the major constraint to rice (Oryza sativa) production and yield stability in rainfed ecosystems. Identifying genomic regions contributing to drought resistance will help to develop rice cultivars suitable for rainfed regions through molecular marker-assisted breeding. Quantitative trait loci (QTLs) linked to plant production traits under drought stress were mapped by evaluating 155 F7 recombinant inbred (RI) lines of IR58821-23-B-1-2-1/IR52561UBN-1-1-2 under rainfed and irrigated conditions in the target environment. The RI lines were subjected to water stress during grain filling by natural rainfall failure events in two successive seasons. The RI lines showed significant variation in plant phenology, plant biomass, yield, and yield components under rainfed and irrigated conditions. Grain yield under rainfed condition had a positive correlation with harvest index and negative correlations with spikelet sterility and the number of days to 50% flowering. A total of 11 QTLs, identified for various plant phenology and production traits under rainfed and irrigated conditions, accounted for 9.3–23.4% of the phenotypic variation. A genomic region identified on chromosome 2 harboured a large effect QTL for grain yield (23.4%) under rainfed conditions. The region C499-PC11M1 on chromosome 2 identified for grain yield under rainfed conditions was colocated with QTLs associated with root traits.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://scienceasia.org/2008.34.n3/scias34_265.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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