Impact of the introgression of resistance loci on agro-oenological traits in grapevine interspecific hybrids
Chedid, E.; Rustenholz, C.; Avia, K.; Dumas, V.; Merdinoglu, D.; Duchene, E.
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O_LIA major aim in modern grapevine (Vitis vinifera L.) breeding programs is the introgression of disease resistance genes along with desired cultural and nological traits. Understanding the genetic links between resistance genes and agro-nological traits is a crucial issue for grapevine breeders. C_LIO_LIWe studied the genetic determinism of a wide range of agro-oenological traits in a complex interspecific hybrid population and identified two cases of colocalizations with disease resistance quantitative trait loci (QTL). C_LIO_LIThe species of origin of chromosomal regions in the off-springs were determined thanks to in silico chromosome painting. The linkage drag around resistance genes from primary gene pool was assessed as low due to a good recombination rate with V. vinifera. C_LIO_LIWe established that wild Vitis species are, apart from their interest in disease resistance, essential resources for improving the cultural characteristics of grapevine. C_LI
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