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ISHS Acta Horticulturae 1147: IX International Symposium on Artichoke, Cardoon and Their Wild Relatives

Quantitative trait loci (QTLs) related to biomass production in Cynara cardunculus L.

Authors:   E.A. Martin, V.P. Cravero, E.L. Cointry
Keywords:   linkage map, F1 mapping population, QTLs, biomass
DOI:   10.17660/ActaHortic.2016.1147.28
Abstract:
In the last years, one of the main research objectives includes the development of new renewable energy sources, opening the possibility to introduce C. cardunculus L. as an energy crop. To generate genotypes with a high energy yield (biomass) is important to investigate the inheritance of the character, which is under QTLs control. The genetics bases of biomass-related traits were studied in 115 F1 individual obtained from a cross between wild cardoon globe artichoke ('Estrella del Sur FCA'). The aim of the work was to identify and localize QTLs controlling biomass-related traits as a first step to marker assisted selection. Both progenitors and their F1 were grown at the UNR Experimental Field Station and they were evaluated over September-December 2014. Five agronomic traits were analyzed: diameter and length of the plant (DP, LP), weight of the total leaves, heads and stalks (WTL, WTH, WTS). All the morphological traits showed normal distribution (W>0.87) and the parental genotypes were significantly different from one to another for all traits analyzed. A total of 16 QTLs associated to biomass production were mapped at LODmin=3. The QTLs for correlated traits frequently were co-localized on the same LG region. This work represents the first time that biomass-related traits QTLs were mapped. The molecular markers linked to QTLs should be used for marker assisted improvement of the species.

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