title: Genetic architecture of palm oil fatty acid composition in cultivated oil palm (Elaeis guineensis Jacq.) compared to its wild relative E. oleifera (H.B.K) Cortés.
abstract: We searched for quantitative trait loci (QTL) associated with the palm oil fatty acid composition of mature fruits of the oil palm E. guineensis Jacq. in comparison with its wild relative E. oleifera (H.B.K) Cortés. The oil palm cross LM2T x DA10D between two heterozygous parents was considered in our experiment as an intraspecific representative of E. guineensis. Its QTLs were compared to QTLs published for the same traits in an interspecific Elaeis pseudo-backcross used as an indirect representative of E. oleifera. Few correlations were found in E. guineensis between pulp fatty acid proportions and yield traits, allowing for the rather independent selection of both types of traits. Sixteen QTLs affecting palm oil fatty acid proportions and iodine value were identified in oil palm. The phenotypic variation explained by the detected QTLs was low to medium in E. guineensis, ranging between 10% and 36%. The explained cumulative variation was 29% for palmitic acid C16:0 (one QTL), 68% for stearic acid C18:0 (two QTLs), 50% for oleic acid C18:1 (three QTLs), 25% for linoleic acid C18:2 (one QTL), and 40% (two QTLs) for the iodine value. Good marker co-linearity was observed between the intraspecific and interspecific Simple Sequence Repeat (SSR) linkage maps. Specific QTL regions for several traits were found in each mapping population. Our comparative QTL results in both E. guineensis and interspecific materials strongly suggest that, apart from two common QTL zones, there are two specific QTL regions with major effects, which might be one in E. guineensis, the other in E. oleifera, which are independent of each other and harbor QTLs for several traits, indicating either pleiotropic effects or linkage. Using QTL maps connected by highly transferable SSR markers, our study established a good basis to decipher in the future such hypothesis at the Elaeis genus level.
authors.affiliation: Oil Palm Biology and Breeding Program, Corporación Centro de Investigación en Palma de Aceite (Cenipalma), Bogotá D.C., Colombia.
authors.forename: Carmenza
authors.initials: C
authors.lastname: Montoya
authors.affiliation: Umr Agap, Centre de coopération internationale en recherche agronomique pour le développement (CIRAD), Montpellier, France.
authors.forename: Benoit
authors.initials: B
authors.lastname: Cochard
authors.affiliation: Umr Agap, Centre de coopération internationale en recherche agronomique pour le développement (CIRAD), Montpellier, France.
authors.forename: Albert
authors.initials: A
authors.lastname: Flori
authors.affiliation: Umr Agap, Centre de coopération internationale en recherche agronomique pour le développement (CIRAD), Montpellier, France.
authors.forename: David
authors.initials: D
authors.lastname: Cros
authors.affiliation: Laboratory of Molecular Biology, Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA), Manaus, Brazil.
authors.forename: Ricardo
authors.initials: R
authors.lastname: Lopes
authors.affiliation: Umr Agap, Centre de coopération internationale en recherche agronomique pour le développement (CIRAD), Montpellier, France.
authors.forename: Teresa
authors.initials: T
authors.lastname: Cuellar
authors.affiliation: Umr Agap, Centre de coopération internationale en recherche agronomique pour le développement (CIRAD), Montpellier, France.
authors.forename: Sandra
authors.initials: S
authors.lastname: Espeout
authors.affiliation: Agricultural Department, SOCFINDO (PT Socfin-Indonesia), Medan, Indonesia.
authors.forename: Indra
authors.initials: I
authors.lastname: Syaputra
authors.affiliation: Umr Iate 1208, Centre de coopération internationale en recherche agronomique pour le développement (CIRAD), Montpellier, France.
authors.forename: Pierre
authors.initials: P
authors.lastname: Villeneuve
authors.affiliation: Umr Iate 1208, Centre de coopération internationale en recherche agronomique pour le développement (CIRAD), Montpellier, France.
authors.forename: Michel
authors.initials: M
authors.lastname: Pina
authors.affiliation: Biotechnology Department, Instituto Vasco de Investigación y Desarrollo Agrario (NEIKER), Vitoria, Spain.
authors.forename: Enrique
authors.initials: E
authors.lastname: Ritter
authors.affiliation: Umr Agap, Centre de coopération internationale en recherche agronomique pour le développement (CIRAD), Montpellier, France.
authors.forename: Thierry
authors.initials: T
authors.lastname: Leroy
authors.affiliation: Umr Agap, Centre de coopération internationale en recherche agronomique pour le développement (CIRAD), Montpellier, France.
authors.forename: Norbert
authors.initials: N
authors.lastname: Billotte
mesh_terms: D028023:Arecaceae / Q000737:chemistry* / Q000145:classification / Q000235:genetics*; D002874:Chromosome Mapping / Q000379:methods; D032461:Chromosomes, Plant / Q000235:genetics; D003433:Crosses, Genetic; D005227:Fatty Acids / Q000737:chemistry*; D017343:Genes, Plant / Q000235:genetics; D008040:Genetic Linkage; D058685:Genetic Pleiotropy; D005838:Genotype; D018895:Microsatellite Repeats / Q000235:genetics; D000073878:Palm Oil; D010641:Phenotype; D010938:Plant Oils / Q000737:chemistry*; D025341:Principal Component Analysis; D040641:Quantitative Trait Loci / Q000235:genetics*; D013045:Species Specificity
chemical_list: D005227:Fatty Acids; D010938:Plant Oils; D000073878:Palm Oil