QTL analysis of fruit components in the progeny of a Rennell Island Tall coconut (Cocos nucifera L.) individual |
| |
Authors: | L Baudouin P Lebrun J L Konan E Ritter A Berger N Billotte |
| |
Institution: | CIRAD-Centre International de Recherches en Agronomie pour le Développement, Avenue Agropolis--TA 80/03, 34398 Montpellier Cedex 5, France. luc.baudouin@cirad.fr |
| |
Abstract: | We investigated the genetic factors controlling fruit components in coconut by performing QTL analyses for fruit component
weights and ratios in a segregating progeny of a Rennell Island Tall genotype. The underlying linkage map of this population
was already established in a previous study, as well as QTL analyses for fruit production, which were used to complement our
results. The addition of 53 new markers (mainly SSRs) led to minor amendments in the map. A total of 52 putative QTLs were
identified for the 11 traits under study. Thirty-four of them were grouped in six small clusters, which probably correspond
to single pleiotropic genes. Some additional QTLs located apart from these clusters also had relatively large effects on the
individual traits. The QTLs for fruit component weight, endosperm humidity and fruit production were found at different locations
in the genome, suggesting that efficient marker-assisted selection for yield can be achieved by selecting QTLs for the individual
components. The detected QTLs descend from a genotype belonging to the “Pacific” coconut group. Based on the known molecular
and phenotypic differences between “Pacific” and “Indo-Atlantic” coconuts, we suggest that a large fraction of coconut genetic
diversity is still to be investigated by studying populations derived from crosses between these groups.
Electronic Supplementary Material Supplementary material is available for this article at and is accessible for authorized users. |
| |
Keywords: | |
本文献已被 PubMed SpringerLink 等数据库收录! |
|