Diallel Analysis of Sweet Potato [Ipomoea batatas (L.) Lam] Genotypes for Combined Beta Carotene and Dry Matter Content in Southern Guinea Savanna, Nigeria

Afolabi, M. S. and Bello, O. B. and Agbowuro, G. O. and Aremu, C. O. and Akoroda, M. O. (2019) Diallel Analysis of Sweet Potato [Ipomoea batatas (L.) Lam] Genotypes for Combined Beta Carotene and Dry Matter Content in Southern Guinea Savanna, Nigeria. ____________________________________________ _________________________________________________________ *Corresponding author: E - mail: afolabimike97@yahoo.com; Journal of Agriculture and Ecology Research International, 19 (2). pp. 1-19. ISSN 394 - 1073

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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 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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