Show simple item record

Genomic characterization of drought tolerance-related traits in spring wheat

Author: Kumar, S.
Author: Sehgal, S.K.
Author: Kumar, U.
Author: Prasad, P.V.V.
Author: Joshi, A.K.
Author: Gill, B.S.
Year: 2012
ISSN: 0014-2336
URI: http://hdl.handle.net/10883/2916
Abstract: Drought tolerance was investigated in ?C306?, one of the most drought tolerant wheat cultivars bred in India in the 1960?s. An intervarietal mapping population of recombinant inbred lines of the cross ?C306? × ?HUW206? was evaluated for drought tolerance components, namely potential quantum efficiency of photosystem (PS) II (Fv/Fm), chlorophyll content (Chl), flag leaf temperature (Lt), and grain yield per plant (Gyp) under stress. Three independent experiments were conducted under well-watered and water-stressed conditions in greenhouses and growth chambers at Kansas State University (USA). Five hundred and sixty microsatellite markers covering the entire genome were screened for polymorphism between the parents. A QTL (QLt.ksu-1D) for Lt (low flag leaf temperature under stress) on the short arm of chromosome 1D between markers Xbarc271 and Xgwm337 at LOD 3.5 explained 37% of the phenotypic variation. A QTL for Fv/Fm (QF v /F m .ksu-3B) and Chl (QChl.ksu-3B) controlling quantum efficiency of PS II and chlorophyll content under stress were co-localized on chromosome 3B in the marker interval Xbarc68?Xbarc101 and explained 35?40% of the phenotypic variation for each trait. A QTL (QGyp.ksu-4A) for Gyp on chromosome 4A at a LOD value of 3.2 explained 16.3% of the phenotypic variation. Inconsistent QTLs were observed for Fv/Fm on chromosomes 3A, 6A, 2B, 4B, and 4D; for Chl on 3A, 6A, 2B and 4B; and for Lt on 1A, 3A 6A, 3B and 5B. The identified QTLs give a first glimpse of the genetics of drought tolerance in C306 and need to be validated in field experiments using the marker-phenotype linkages reported here.
Language: English
Copyright: CIMMYT manages Intellectual Assets as International Public Goods. The user is free to download, print, store and share this work. In case you want to translate or create any other derivative work and share or distribute such translation/derivative work, please contact CIMMYT-Knowledge-Center@cgiar.org indicating the work you want to use and the kind of use you intend; CIMMYT will contact you with the suitable license for that purpose.
Type: Article
Region: Global
Pages: 265-276
Journal issue: 1
Journal: Euphytica
Journal volume: 186
DOI: 10.1007/s10681-012-0675-3
Keywords: Chlorophyll content
Keywords: Chlorophyll fluorescence
Keywords: Leaf temperature
Keywords: Triticum aestivum
Keywords: QTL


Files in this item

Thumbnail

This item appears in the following Collection(s)

  • Wheat
    Wheat - breeding, phytopathology, physiology, quality, biotech

Show simple item record