Diallel Analysis of Sweet Potato [Ipomoea batatas (L.) Lam] Genotypes for Combined Beta Carotene and Dry Matter Content in Southern Guinea Savanna, Nigeria
2019
Afolabi, M. S. | Bello, O. B. | Agbowuro, G. O. | Aremu, C. O. | Akoroda, M. O.
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 thir ty progenies were evaluated for beta carotene (β - carotene) and dry matter content in Landmark University, Omu Aran, Kwara State, Nigeria. The 30 F 1 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 c ttg ontent 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
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