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Hybridization between crops and wild relatives: the contribution of cultivated lettuce to the vigour of crop–wild hybrids under drought, salinity and nutrient deficiency conditions

Uwimana, Brigitte; Smulders, Marinus J.M.; Hooftman, Danny A.P.; Hartman, Yorike; van Tienderen, Peter H.; Jansen, Johannes; McHale, Leah K.; Michelmore, Richard W.; van de Wiel , Clemens C.M.; Visser , Richard G.F.. 2012 Hybridization between crops and wild relatives: the contribution of cultivated lettuce to the vigour of crop–wild hybrids under drought, salinity and nutrient deficiency conditions. Theoretical and Applied Genetics, 125 (6). 1097-1111. 10.1007/s00122-012-1897-4

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Abstract/Summary

With the development of transgenic crop varieties,crop–wild hybridization has received considerable consideration with regard to the potential of transgenes to be transferred to wild species. Although many studies have shown that crops can hybridize with their wild relatives and that the resulting hybrids may show improved fitness over the wild parents, little is still known on the genetic contribution of the crop parent to the performance of the hybrids. In this study, we investigated the vigour of lettuce hybrids using 98 F2:3 families from a cross between cultivated lettuce and its wild relative Lactuca serriola under non-stress conditions and under drought, salinity and nutrient deficiency. Using single nucleotide polymorphism markers, we mapped quantitative trait loci associated with plant vigour in the F2:3 families and determined the allelic contribution of the two parents. Seventeen QTLs (quantitative trait loci) associated with vigour and six QTLs associated with the accumulation of ions (Na?, Cl- and K?) were mapped on the nine linkage groups of lettuce. Seven of the vigour QTLs had a positive effect from the crop allele and six had a positive effect from the wild allele across treatments, and four QTLs had a positive effect from the crop allele in one treatment and from the wild allele in another treatment. Based on the allelic effect of the QTLs and their location on the genetic map, we could suggest genomic locations where transgene integration should be avoided when aiming at the mitigation of its persistence once crop–wild hybridization takes place.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1007/s00122-012-1897-4
Programmes: CEH Topics & Objectives 2009 onwards > Biodiversity > BD Topic 2 - Ecological Processes in the Environment
CEH Topics & Objectives 2009 onwards > Biodiversity > BD Topic 1 - Observations, Patterns, and Predictions for Biodiversity
CEH Sections: Hails
ISSN: 0040-5752
Additional Information. Not used in RCUK Gateway to Research.: Open Access paper - click on Official URL link for full text
NORA Subject Terms: Ecology and Environment
Biology and Microbiology
Date made live: 31 Aug 2012 14:05
URI: http://nora.nerc.ac.uk/id/eprint/19445

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