QTLs for barley yield adaptation to Mediterranean environments in the ‘Nure’ × ‘Tremois’ biparental population

Tondelli, A and Francia, E and Visioni, A and Comadran, J and Mastrangelo, A M and Akar, T and Al-Yassin, A and Ceccarelli, S and Grando, S and Benbelkacem, A and van Eeuwijk, F A and Thomas, W T B and Stanca, A M and Romagosa, I and Pecchioni, N (2014) QTLs for barley yield adaptation to Mediterranean environments in the ‘Nure’ × ‘Tremois’ biparental population. Euphytica, 197 (1). pp. 73-86. ISSN 1573-5060

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Abstract

Multi-environment trials represent a highly valuable tool for the identification of the genetic bases of crop yield potential and stress adaptation. A Diversity Array Technology®-based barley map has been developed in the ‘Nure’ × ‘Tremois’ biparental Doubled Haploid population, harbouring the genomic position of a gene set with a putative role in the regulation of flowering time and abiotic stress response in barley. The population has been evaluated in eighteen location-by-year combinations across the Mediterranean basin. QTL mapping identified several genomic regions responsible for barley adaptation to Mediterranean conditions in terms of phenology, grain yield and yield component traits. The most frequently detected yield QTL had the early flowering HvCEN_EPS2 locus (chromosome 2H) as peak marker, showing a positive effect from the early winter parent ‘Nure’ in eight field trials, and explaining up to 45.8 % of the observed variance for grain yield. The HvBM5A_VRN-H1 locus on chromosome 5H and the genomic region possibly corresponding to PPD-H2 on chromosome 1H were significantly associated to grain yield in five and three locations, respectively. Environment-specific QTLs for grain yield, and clusters of yield component QTLs not related to phenology and or developmental genes (e.g. on chromosome 4H, BIN_09) were observed as well. The results of this work provide a valuable source of knowledge and tools for both explaining the genetic bases of barley yield adaptation across the Mediterranean basin, and using QTL-associated markers for MAS pre-breeding and breeding programmes.

Item Type:	Article
Divisions:	RP-Dryland Cereals
CRP:	CGIAR Research Program on Dryland Cereals
Uncontrolled Keywords:	Barley, QTL mapping, Multi-environment trial, Mediterranean conditions,
Subjects:	Others > Genetics and Genomics
Depositing User:	Mr Siva Shankar
Date Deposited:	30 Apr 2014 08:56
Last Modified:	19 Oct 2016 10:23
URI:	http://oar.icrisat.org/id/eprint/7924
Official URL:	http://dx.doi.org/10.1007/s10681-013-1053-5
Projects:	UNSPECIFIED
Funders:	UNSPECIFIED
Acknowledgement:	Dr Grando S - present address is ICRISAT, Patancheru, 502 324, India
Links:	Google Scholar

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