Mating system analysis in a natural population of Acacia nilotica subspecies leiocarpa |
| |
| Authors: | A K Mandal R A Ennos C W Fagg |
| |
| Institution: | (1) Genetics Division, Tropical Forest Research Institute, Mandla Rd., 482021 Jabalpur, India;(2) Institute of Ecology and Resource Management, University of Edinburgh, EH9 3JU Edinburgh, UK;(3) Oxford Forestry Institute, University of Oxford, 6 South Parks Rd., OX1 3BU Oxford, UK |
| |
| Abstract: | The mating-system was investigated in a natural population of the tetraploid taxon Acacia nilotica ssp. leiocarpa using open-pollinated seeds from 15 families. Six-day-old germinated seeds were used for starch-gel electrophoresis. Three enzyme systems (ADH, EST-1, and 6PGD) were scored. Isozyme banding patterns and segregation of isozyme variants within families suggest that the species is an autotetraploid displaying tetrasomic inheritance. Estimates of single-locus (ts=0.358) and multilocus (tm=0.384) population outcrossing rates were homogeneous, and indicate substantial selfing in the population. Heterogeneity of outcrossing estimates among loci and families were marked, suggesting departure from the assumptions of the mixed-mating model. Implications of the result for the utilization of germplasm in tree-improvement programmes are noted. |
| |
| Keywords: | Acacia nilotica Mating-system Isozyme Autotetraploid Inbreeding |
| 本文献已被 SpringerLink 等数据库收录！ |
|
