Genetic variation within two subspecies of Acacia nilotica
1999
Varghese, M. (Institute of Forest Genetics and Tree Breeding, Coimbatore (India)) | Edwards, M.A. | Hamrick, J.L.
Fifteen enzyme systems were analysed in seeds of two subspecies of Acacia nilotica. Allozyme diversity at 37 putative loci was determined from five populations of subspecies indica and four populations of subspecies tomentosa. Subspecies tomentosa had more polymorphic loci (P=51.4% vs 45.9%), higher mean number of alleles per locus (A=1.5 vs 1.4) and higher genetic diversity (He=0.112 vs 0.086) than subspecies indica. Genetic differentiation between populations was greater in subspecies indica (GST=0.047 vs 0.015) which is also shown by the lower genetic identity values for subspecies indica (I=0.977) compared to those of the subspecies tomentosa (I=0.997). The results are discussed and compared with those reported for other acacias and other plant taxa
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