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GrainGenes Reference Report: PBJ-14-735

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Reference	PBJ-14-735
Title	A multiparental cross population for mapping QTL for agronomic traits in durum wheat (Triticum turgidum ssp. durum).
Journal	Plant Biotechnology Journal
Year	2016
Volume	14
Pages	735-748
Author	Milner SG [ Show all 8 ]
Abstract	Multiparental cross designs for mapping quantitative trait loci (QTL) provide an efficient alternative to biparental populations because of their broader genetic basis and potentially higher mapping resolution. We describe the development and deployment of a recombinant inbred line (RIL) population in durum wheat (Triticum turgidum ssp. durum) obtained by crossing four elite cultivars. A linkage map spanning 2664 cM and including 7594 single nucleotide polymorphisms (SNPs) was produced by genotyping 338 RILs. QTL analysis was carried out by both interval mapping on founder haplotype probabilities and SNP bi‐allelic tests for heading date and maturity date, plant height and grain yield from four field experiments. Sixteen QTL were identified across environments and detection methods, including two yield QTL on chromosomes 2BL and 7AS, with the former mapped independently from the photoperiod response gene Ppd‐B1, while the latter overlapped with the vernalization locus VRN‐A3. Additionally, 21 QTL with environment‐specific effects were found. Our results indicated a prevalence of environment‐specific QTL with relatively small effect on the control of grain yield. For all traits, functionally different QTL alleles in terms of direction and size of genetic effect were distributed among parents. We showed that QTL results based on founder haplotypes closely matched functional alleles at known heading date loci. Despite the four founders, only 2.1 different functional haplotypes were estimated per QTL, on average. This durum wheat population provides a mapping resource for detailed genetic dissection of agronomic traits in an elite background typical of breeding programmes.
External Databases	https://doi.org/10.1111/pbi.12424
QTL	[ Hide all but 1 of 35 ] QTL1625_2A-Milner_et_al._2016_ QTL1630_2B-Milner_et_al._2016_ QTL1648_7A-Milner_et_al._2016_ QTL1622_2A-Milner_et_al._2016_ QTL1626_2B-Milner_et_al._2016_ QTL1652_7A-Milner_et_al._2016_ QTL1632_3A-Milner_et_al._2016_ QTL1638_4B-Milner_et_al._2016_ QTL1627_2B-Milner_et_al._2016_ QTL1651_7A-Milner_et_al._2016_ QTL1645_6B-Milner_et_al._2016_ QTL1642_6A-Milner_et_al._2016_ QTL1628_2B-Milner_et_al._2016_ QTL1619_1A-Milner_et_al._2016_ QTL1633_4A-Milner_et_al._2016_ QTL1649_7A-Milner_et_al._2016_ QTL1620_1B-Milner_et_al._2016_ QTL1624_2A-Milner_et_al._2016_ QTL1637_4B-Milner_et_al._2016_ QTL1647_7A-Milner_et_al._2016_ QTL1639_4B-Milner_et_al._2016_ QTL1646_6B-Milner_et_al._2016_ QTL1629_2B-Milner_et_al._2016_ QTL1621_1B-Milner_et_al._2016_ QTL1650_7A-Milner_et_al._2016_ QTL1653_7B-Milner_et_al._2016_ QTL1634_4A-Milner_et_al._2016_ QTL1640_5B-Milner_et_al._2016_ QTL1641_5B-Milner_et_al._2016_ QTL1623_2A-Milner_et_al._2016_ QTL1635_4A-Milner_et_al._2016_ QTL1631_2B-Milner_et_al._2016_ QTL1643_6A-Milner_et_al._2016_ QTL1644_6A-Milner_et_al._2016_ QTL1636_4B-Milner_et_al._2016_

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