Studies on Pollen Viability Heterosis in Parents and F1 Hybrids of Genus Solanum L. (Solanaceae)

Raji Akitunde Abdullateef, Nor Hafizah Zakaria, Nor Hazwani Hasali, Hassanat Jimoh, Abdul Wahab Nafis, Mohamad Osman

Abstract


Five collections of Solanum namely: S. melongena (purple variety, SM-1), S. melongena (white variety, SM-2), S. gillo (variety, SG-3), S. gillo (variety, SG-4), and S. gillo (variety, SG-5), were crossed in all possible combinations and the hybrids evaluated for heterosis. The results revealed percentage pollen viability was 82.3, 83.3, 67.0, 42.5 and 64.5% respectively for SM-1, SM-2, SG-3, SG-4, and SG-5. The hybrids resulting from inter varietal crosses, SM-1 x SM-2; SM-2 x SM-1 (a reciprocal cross), and SG-4 x SG-5 had 65.90, 66.3, and 76.0% respectively; while the inter specific crosses SM-1 x SG-5, SG-4 x SM-2, and SM-2 x SG-5 had 21.2, 55.5, and 63.7% respectively. The highest percentage pollen viability was recorded in SM-1 and SM-2, the two collections of Solanum melongena; pollen viability was also high in their reciprocal hybrids. The highest value among the hybrids, was recorded for SG-4 x SG-5 (76%), a cross between two collections of Solanum gillo. The lowest values (21.2% and 55.5%) were obtained for the interspecific crosses SM-1 X SG-5 and SG-4 X SM-2 respectively. One way analysis of variance at p<.05 revealed significant differences across studied pollens of parents and F1Solanum accessions at p<0.000. The inter varietal cross SG-4 x SG-5 and the inter specific cross SG-4 x SM-2 with 22.5 and 2.0% heterosis effects respectively, possessed qualitative pollen traits and could enhance effective pollination, high seed and fruit sets in subsequent generations.

Full Text: PDF DOI: 10.5539/ijb.v4n3p117

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International Journal of Biology   ISSN 1916-9671(Print)   ISSN 1916-968X  (Online)

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