Genomic regions in crop-wild hybrids of lettuce are affected differently in different environments: implications for crop breeding
Hartman, Yorike; Hooftman, Danny A.P.; Uwimana, Brigitte; van de Wiel, Clemens C.M.; Smulders, Marinus J.M.; Visser, Richard G.F.; van Tienderen, Peter H.. 2012 Genomic regions in crop-wild hybrids of lettuce are affected differently in different environments: implications for crop breeding. Evolutionary Applications, 5 (6). 629-640. 10.1111/j.1752-4571.2012.00240.xFull text not available from this repository.
Many crops contain domestication genes that are generally considered to lower fitness of crop–wild hybrids in the wild environment. Transgenes placed in close linkage with such genes would be less likely to spread into a wild population. Therefore, for environmental risk assessment of GM crops, it is important to know whether genomic regions with such genes exist, and how they affect fitness. We performed quantitative trait loci (QTL) analyses on fitness(-related) traits in two different field environments employing recombinant inbred lines from a cross between cultivated Lactuca sativa and its wild relative Lactuca serriola. We identified a region on linkage group 5 where the crop allele consistently conferred a selective advantage (increasing fitness to 212% and 214%), whereas on linkage group 7, a region conferred a selective disadvantage (reducing fitness to 26% and 5%), mainly through delaying flowering. The probability for a putative transgene spreading would therefore depend strongly on the insertion location. Comparison of these field results with greenhouse data from a previous study using the same lines showed considerable differences in QTL patterns. This indicates that care should be taken when extrapolating experiments from the greenhouse, and that the impact of domestication genes has to be assessed under field conditions.
|Programmes:||CEH Topics & Objectives 2009 onwards > Biodiversity > BD Topic 2 - Ecological Processes in the Environment > BD - 2.3 - Identify indicators and traits of ecosystem status ...
CEH Topics & Objectives 2009 onwards > Biodiversity > BD Topic 1 - Observations, Patterns, and Predictions for Biodiversity > BD - 1.3 - Long-term/large-scale monitoring and experiments ...
|Additional Information:||Open Access paper - click on Official URL link for full text|
|Additional Keywords:||crop–wild hybrids, fitness, hitchhiking, Lactuca, mitigation strategy, quantitative trait loci, selection, transgenic plants|
|NORA Subject Terms:||Biology and Microbiology|
|Date made live:||09 Mar 2012 11:41|
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