Genetic diversity assessment and relationship among tropical yellow endosperm maize inbred lines using SSR markers
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Date
2011
Authors
Adeyemo, O. A.
Menkir, A.
Gedil, M.
Omidiji, O.
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Abstract
Maize is the most important food crop in sub-Saharan Africa. Tropical-adapted yellow maize inbred lines can
be used as source of provision of pro-vitamin A, needed by millions of African children that suffer from vitamin
A deficiency. A substantial variation of pro-vitamin A content is known to exist among available inbred lines. The
objective of this study was to assess the diversity and relationship among 38 tropical-adapted maize inbred lines.
The lines were investigated using 87 SSR markers. Seventy-five (75) SSR markers were polymorphic across the 38
inbred lines and generated a total of 297 alleles. The polymorphic information content (PIC) values obtained for the
polymorphic SSR markers varied from 0.17 to 0.84 with an average of 0.56 .The number of polymorphic alleles per
locus ranged from 2 to 11 with a mean of 3.96. Genetic distance (GD) values among all pairs of inbred lines varied
from 0.007 to 0.59 with an average of 0.45. Cluster and principal coordinate analyses based on genetic distance
from SSR data showed two well defined main groups of the 38 inbred lines, consistent with their pedigrees. The
study has revealed a considerable level of genetic diversity among the inbred lines. The genetic potential that exists
will facilitate the selection of parents with diverse alleles for development of new maize genotypes with higher
pro-vitamin A level.
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Keywords
cluster analysis; Principal Coordinate analysis; genetic distance; SSRs; tropical-adapted yellow maize inbred lines
Citation
Adeyemo, O., Abebe M., Gedil, M. and Omidiji, O. 2011. Genetic diversity assessment and relationship among tropical-yellow endosperm maize inbred lines using SSR markers. Maydica. 56(1703): 1-7.