Genetic Diversity among Tropical Provitamin A Maize Inbred Lines and Implications for a Biofortification Program
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Date
2019
Journal Title
Journal ISSN
Volume Title
Publisher
Cereal research communications
Abstract
Insights into the diversity and relationships among elite breeding materials are an important
component in maize improvement programs. We genotyped 63 inbred lines bred for high
levels of provitamin A using 137 single nucleotide polymorphism markers. A total of 272
alleles were detected with gene diversity of 0.36. Average genetic distance was 0.36 with
56% of the pairs of lines having between 0.30 and 0.40. Eighty-six percent of the pairs of
lines showed relative kinship values <0.50, which indicated that the majority of these provitamin
A inbred lines were unique. Relationship pattern and population structure analysis
revealed presence of seven major groups with good agreement with Neighbour Joining
clustering and somewhat correlated with pedigree and breeding origin. Utilization of this set
of provitamin A lines in a new biofortification program will be aided by information from
both molecular-based grouping and pedigree analysis. The results should guide breeders in
selecting parents for hybrid formation and testing as a short-term objective, and parents with
diverse alleles for new breeding starts as a long-term objective in a provitamin A breeding
program.
Description
Keywords
Maize, Inbred, Provitamin
Citation
Sserumaga, J. P., Makumbi, D., Warburton, M. L., Opiyo, S. O., Asea, G., Muwonge, A., & Kasozi, C. L. (2019). Genetic diversity among tropical provitamin A maize inbred lines and implications for a biofortification program. Cereal research communications, 47(1), 134-144. DOI: 10.1556/0806.46.2018.066