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GrainGenes Reference Report: PEN-32-758

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Reference	PEN-32-758
Title	Genomic dissection of drought resistance in durum wheat x wild emmer wheat recombinant inbreed line population.
Journal	Plant, Cell and Environment
Year	2009
Volume	32
Pages	758-779
Author	Peleg Z [ Show all 7 ]
Abstract	Drought is the major factor limiting wheat productivity worldwide. The gene pool of wild emmer wheat, Triticum turgidum ssp. dicoccoides, harbours a rich allelic repertoire for morpho-physiological traits conferring drought resistance. The genetic and physiological bases of drought responses were studied here in a tetraploid wheat population of 152 recombinant inbreed lines (RILs), derived from a cross between durum wheat (cv. Langdon) and wild emmer (acc# G18-16), under contrasting water availabilities. Wide genetic variation was found among RILs for all studied traits. A total of 110 quantitative trait loci (QTLs) were mapped for 11 traits, with LOD score range of 3.0-35.4. Several QTLs showed environmental specificity, accounting for productivity and related traits under water-limited (20 QTLs) or well-watered conditions (15 QTLs), and in terms of drought susceptibility index (22 QTLs). Major genomic regions controlling productivity and related traits were identified on chromosomes 2B, 4A, 5A and 7B. QTLs for productivity were associated with QTLs for drought‐adaptive traits, suggesting the involvement of several strategies in wheat adaptation to drought stress. Fifteen pairs of QTLs for the same trait were mapped to seemingly homoeologous positions, reflecting synteny between the A and B genomes. The identified QTLs may facilitate the use of wild alleles for improvement of drought resistance in elite wheat cultivars.
External Databases	https://doi.org/10.1111/j.1365-3040.2009.01956.x
QTL	[ Hide all but 1 of 23 ] QTL1701_2B-Peleg_et_al._2009b QTL1707_4B-Peleg_et_al._2009b QTL1705_4A-Peleg_et_al._2009b QTL1709_5A-Peleg_et_al._2009b QTL1715_7B-Peleg_et_al._2009b QTL1698_2B-Peleg_et_al._2009b QTL1714_7B-Peleg_et_al._2009b QTL1697_2B-Peleg_et_al._2009b QTL1700_2B-Peleg_et_al._2009b QTL1708_5A-Peleg_et_al._2009b QTL1702_3B-Peleg_et_al._2009b QTL1695_2A-Peleg_et_al._2009b QTL1694_1B-Peleg_et_al._2009b QTL1711_6A-Peleg_et_al._2009b QTL1704_4A-Peleg_et_al._2009b QTL1712_6B-Peleg_et_al._2009b QTL1710_5B-Peleg_et_al._2009b QTL1703_4A-Peleg_et_al._2009b QTL1716_7B-Peleg_et_al._2009b QTL1713_7A-Peleg_et_al._2009b QTL1699_2B-Peleg_et_al._2009b QTL1706_4A-Peleg_et_al._2009b QTL1696_2A-Peleg_et_al._2009b

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