NDLI: Drought-tolerance QTLs commonly detected in two sets of reciprocal introgression lines in rice

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Drought-tolerance QTLs commonly detected in two sets of reciprocal introgression lines in rice

Content Provider	Semantic Scholar
Author	Wang, Yingying Zhang, Qiang Zheng, Tianqing Cui, Yanru Zhang, Wenzhong Xu, Jianlong Li, Zhikang
Copyright Year	2014
Abstract	Drought is one of the major abiotic stresses limiting rice (Oryza sativa L.) production. Quantitative trait loci (QTLs) for drought tolerance (DT) at the reproductive stage were identified with two sets of reciprocal introgression lines derived from Lemont Teqing. In total, 29 and 23 QTLs were identified in the Teqing and Lemont backgrounds, respectively, during the reproductive stage under drought and irrigated conditions for spikelet number per panicle, seed fertility, filled grain weight per panicle, plant height, and grain yield per plant. Most of these QTLs showed obvious differential expressions in response todrought stress.Another21QTLsweredetectedby the ratio of trait valuesunderdrought stress relative to the normal irrigation conditions in the two backgrounds. For 28 DTQTLs, the Teqing alleles at 23 loci had increased trait values and could improve DT under drought stress. Only five (17.9%) DTQTLs (QSnp1b,QSnp3a,QSnp11, QSf8, and QGyp2a) were consistently detected in the two backgrounds, clearly suggesting overwhelming genetic background effects on QTL detection for DT. Seven of the DT QTL regions identified were found to share the same genomic regionswith previously reportedDT-relatedgenes. Introgressingor pyramidingof favourable alleles fromTeqingat the validated QTLs (QSnp3a, QSnp11 and QGyp2a) into Lemont background may improve DT level of Lemont. Additional keywords: Abiotic stress tolerance, marker-assisted selection, pyramiding, genetic background effect, rice. Received 5 October 2013, accepted 20 December 2013, published online 14 February 2014
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://www.publish.csiro.au/cp/pdf/CP13344
Language	English
Access Restriction	Open
Subject Keyword	Alleles Droughts Fertility Fill Oryza (plant) Oryza sativa Quantitative Trait Loci Reproduction Scientific Publication drought tolerance
Content Type	Text
Resource Type	Article

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