Allelic diversity of natural oil palm (Elaeis guineensis Jacq.) Populations detected by microsatellite markers. Implication in conservation
Author
Bakoumé, Claude
Wickneswari, Ratnam
Rajanaidu, Nookiah
Arhmand Kushairi Din,
Amblard, Philippe
Billotte, Norbert
Como citar
Publicación:
Revista Palmas; Vol. 28 Núm. especial, (2007); 149-158
0121-2923
Revista Palmas; Vol. 28 Núm. especial, (2007); 149-158
0121-2923
Abstract
The allelic diversity within 49 populations representing ten African countries, three breeding materials and one semi-wild material was determined using 16 microsatellite loci. A total of 209 alleles were revealed. The number of alleles at the 16 loci ranged from 8 to 22 (mean = 13.1). Same rare alleles were found (p < 0.05) across populations from areas with dry weather irrespective to the country. Rare alleles in Deli MPOB, which were common in natural oil palm populations, denoted their reduction due to many years of selection. Mean number of alleles per locus (A) ranged from 1.1 to 6.7 (mean = 5.0 ± 1.7). The effective number of alleles (Ae) ranged from 1.1 ± 0.2 to 4.7 ± 1.7 (mean = 3.3 ± 1.3). The Duncan?s multiple range tests separated the group of populations from Madagascar from the rest for Ae. The groups of means overlapped for the rest of the populations. When absolute values where considered, the high Ae found in populations from Nigeria (106-143% of the mean Ae from this study) tended to diminish westwards and eastwards. Implication of the data obtained in the conservation of oil palm genetic resources is explored. Se determinó la diversidad alélica dentro de 49 poblaciones que representan a 10 países africanos, tres materiales de mejoramiento genético y un material semi-silvestre mediante el uso de 16 locus microsatelitales. Se encontró un total de 209 alelos. El número de alelos de los 16 locus oscilaba entre 8 y 22 (media = 13,1). Se encontraron algunos alelos poco comunes (p 0,05) en poblaciones de áreas con clima seco, sin tener en cuenta el país. Los alelos excepcionales en Deli MPOB, que eran poco comunes en las poblaciones naturales de palma de aceite, presentaban una reducción debido a los muchos años de selección. El número medio de alelos por locus (A) osciló entre 1,1 y 6,7 (media = 5,0 ± 1,7). El número efectivo de alelos (Ae) osciló entre 1,1 ± 0,2 y 4,7 ± 1,7 (media = 3,3 ± 1,3). La prueba de rango múltiple de Duncan segregó el grupo de poblaciones de Madagascar del resto para Ae. Los grupos de medias se sobreponían para el resto de las poblaciones. Cuando se consideraron los valores absolutos, se encontró un alto Ae en las poblaciones de Nigeria (106-143 por ciento de la media Ae del estudio) que tendía a disminuir hacia el occidente y el oriente. Se exploran las inferencias de los datos obtenidos en la conservación de los recursos genéticos de la palma de aceite.
The allelic diversity within 49 populations representing ten African countries, three breeding materials and one semi-wild material was determined using 16 microsatellite loci. A total of 209 alleles were revealed. The number of alleles at the 16 loci ranged from 8 to 22 (mean = 13.1). Same rare alleles were found (p < 0.05) across populations from areas with dry weather irrespective to the country. Rare alleles in Deli MPOB, which were common in natural oil palm populations, denoted their reduction due to many years of selection. Mean number of alleles per locus (A) ranged from 1.1 to 6.7 (mean = 5.0 ± 1.7). The effective number of alleles (Ae) ranged from 1.1 ± 0.2 to 4.7 ± 1.7 (mean = 3.3 ± 1.3). The Duncan?s multiple range tests separated the group of populations from Madagascar from the rest for Ae. The groups of means overlapped for the rest of the populations. When absolute values where considered, the high Ae found in populations from Nigeria (106-143% of the mean Ae from this study) tended to diminish westwards and eastwards. Implication of the data obtained in the conservation of oil palm genetic resources is explored.
Palabras clave:
palma de aceite
elaeis guineensis
biodiversidad
conservación del germoplasma
marcadores genéticos
población vegetal
recursos genéticos
palma de aceite
elaeis guineensis
biodiversidad
conservación del germoplasma
marcadores genéticos
población vegetal
recursos genéticos