Inheritance of seed size in cowpea (Vigna unguiculata (L.) Walp.)
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The inheritance of seed weight in cowpea was examined in a field planting of the parents, reciprocal F1s, F2s and backcrosses to both parents of a cross between TVu 1977-OD (small seeded) and ACC 70002 (large).
Seed weight was inherited quantitatively and small seed was partially domiminant to large seed size. Gene action was predominantly additive but dominance and additive × additive epistatic effects were also significant.
Broad and narrow sense heritabilities were 85.1±5.3% and 75.4±18.6% respectively. The minimum number of loci involved in the inheritance of seed size was eight, and each gene pair contributed up to 1.02 g increase to seed weight. The estimate of genetic advance from F2 to F3 generations with 5% selection intensity was 3.58 g.
Index wordsVigna unguiculata cowpea seed size genetics additive dominance heritability
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- Agble F., 1972. Seed size heterosis in cowpea (Vigna unguiculata L. Walp.). Ghana J. Sci. 12: 30–33.Google Scholar
- Allard R. W., 1960. Principles of plant breeding. John Wiley and Sons, Inc., New York.Google Scholar
- Aryeetey A. M. & E. Laing, 1973. Inheritance of yield components and their correlation with yield in cowpea (Vigna unguiculata L. Walp.). Euphytica 22: 386–392.Google Scholar
- Brittingham W. H., 1950. The inheritance of date of pod maturity, pod length, seed shape and seed size in the southern pea (Vigna sinensis). Proc. Am. Soc. Hort. Sci. 56: 381–388.Google Scholar
- Cavalli L. L., 1952. An analysis of linkage in quantitative inheritance. In: E. C. R. Rieve & C. H. Waddington (Eds), Quantitative inheritance. pp. 135–144, HMSO, London.Google Scholar
- Drabo I., 1981. Inheritance in the cowpea Vigna unguiculata L. Walp. 100 seed weight, seed number per pod and seed coat characteristics. M. Phil. Thesis. University of Ibadan, Ibadan, Nigeria.Google Scholar
- Drabo, I., T. A. O. Ladeinde, R. Redden & J. B. Smithson, unpublished. Inheritance of seed size and seed number per pod in the cowpea (Vigna unguiculata L. Walp.).Google Scholar
- Jinks J. L. & R. M. Jones, 1978. Estimation of the components of heterosis. Genetics 43: 223–234.Google Scholar
- Lawrence, M. J. & J. L. Jinks, 1973. Quantitative genetics. In: P. H. Sheppard (Ed.), Practical genetics. pp. 88–129.Google Scholar
- Leleji, O., 1976. Inheritance of three agronomic characters in cowpea (Vigna unguiculata L.). Samaru Bulletin 252, Zaria, Nigeria.Google Scholar
- Mather K., 1949. Biometrical genetics (1st Edn). Methuen, London.Google Scholar
- Mather K. & J. L. Jinks, 1971. Biometrical genetics (2nd Edn). Chapman and Hall Ltd., London.Google Scholar
- Sene D., 1968. Heridité du poids de 100 graines chez Vigna unguiculata (L.) Walp. (Cowpea). Agron. Trop. 23: 1345–1351.Google Scholar
- Warner D. J. & S. Honma, 1980. Inheritance of leaf geometry in cauliflower. J. Hered. 71: 105–109.Google Scholar