Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/122434
Citations
Scopus Web of Science® Altmetric
?
?
Type: Journal article
Title: QTL analysis and fine mapping of a QTL for yield-related traits in wheat grown in dry and hot environments
Author: Tura, H.
Edwards, J.
Gahlaut, V.
Garcia, M.
Sznajder, B.
Baumann, U.
Shahinnia, F.
Reynolds, M.
Langridge, P.
Balyan, H.S.
Gupta, P.K.
Schnurbusch, T.
Fleury, D.
Citation: Theoretical and Applied Genetics, 2020; 133(1):239-257
Publisher: Springer Verlag
Issue Date: 2020
ISSN: 0040-5752
1432-2242
Statement of
Responsibility: 
Habtamu Tura, James Edwards, Vijay Gahlaut, Melissa Garcia, BeataSznajder, Ute Baumann, Fahimeh Shahinnia, Matthew Reynolds, Peter Langridge, Harindra Singh Balyan, Pushpendra K. Gupta, Thorsten Schnurbusch, Delphine Fleury
Abstract: Genetic control of grain yield and phenology was examined in the Excalibur/Kukri doubled haploid mapping population grown in 32 field experiments across the climatic zones of southern Australia, India and north-western Mexico where the wheat crop experiences drought and heat stress. A total of 128 QTL were identified for four traits: grain yield, thousand grain weight (TGW), days to heading and grain filling duration. These QTL included 24 QTL for yield and 27 for TGW, showing significant interactions with the environment (Q * E). We also identified 14 QTL with a significant, small main effects on yield across environments. The study focussed on a region of chromosome 1B where two main effect QTL were found for yield and TGW without the confounding effect of phenology. Excalibur was the source of favourable alleles: QYld.aww-1B.2 with a peak at 149.5-150.1 cM and QTgw.aww-1B at 168.5-171.4 cM. We developed near isogenic lines (NIL) for the interval including QYld.aww-1B.2 and QTgw.aww-1B and evaluated them under semi-controlled conditions. Significant differences in four pairs of NIL were observed for grain yield but not for TGW, confirming a positive effect of the Excalibur allele for QYld.aww-1B.2. The interval containing QYld.aww-1B.2 was narrowed down to 2.9 cM which corresponded to a 2.2 Mbp genomic region on the chromosome 1B genomic reference sequence of cv. Chinese Spring and contained 39 predicted genes.
Keywords: Chromosomes, Plant; Triticum; Seeds; Physical Chromosome Mapping; Environment; Seasons; Chromosome Segregation; Quantitative Trait, Heritable; Phenotype; Haploidy; Genes, Plant; Quantitative Trait Loci; Droughts
Rights: © Springer-Verlag GmbH Germany, part of Springer Nature 2019
RMID: 1000001363
DOI: 10.1007/s00122-019-03454-6
Grant ID: http://purl.org/au-research/grants/arc/IH130200027
Appears in Collections:Agriculture, Food and Wine publications

Files in This Item:
There are no files associated with this item.


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.