Diallel Analysis of Sweet Potato [Ipomoea batatas (L.) Lam] Genotypes for Combined Beta Carotene and Dry Matter Content in Southern Guinea Savanna, Nigeria
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Date
2019-07-26
Journal Title
Journal ISSN
Volume Title
Publisher
Journal of Agriculture and Ecology Research International
Abstract
Roots of orange-fleshed sweet potato varieties currently available in Nigeria contain high quantities
of β-carotene or pro-vitamin A but have high moisture content. These varieties have been found to
be a cheap and crucially important remedy for vitamin A deficiency. The cream or white-fleshed
varieties, on the other hand, have a sweet taste with high dry matter content, giving a dry texture, a
quality trait preferred in Nigeria. Development of sweet potato genotypes that can combine these
two important quality traits is the objective of this breeding work. A diallel experiment using six
parental sweet potato genotypes crossed in all possible combinations were carried out and thirty progenies were evaluated for beta carotene (β-carotene) and dry matter content in Landmark
University, Omu Aran, Kwara State, Nigeria. The 30 F1 progenies along with their parental lines
were planted in the same field trial. The trial was laid out in 6 x 6 triple lattice in two replications.
Highly significant (P≤ 0.01) differences were observed among the genotypes for the traits. The
average β-carotene content among the progenies was 2.86 (mg/100g.f.w) while the dry matter
cttgontent had a mean value of 31.89%. The cross progenies 199024.2 x Excel had the highest
beta carotene (14.37mg/100g.f.w) content with the highest dry matter content (40.10%) and are
therefore recommended for further evaluation.
Description
Staff Publication
Keywords
Diallel analysis;, dry matter;, Southern Guinea Savanna;, sweet potato;, Vitamin A;, β- carotene