Full text in pdf format

Okra-leaf and normal cotton isolines with different backgrounds

Fanuel P. da Silva; F.L.O. Melo; F.J.A.F. Távora; F.V. Costa Neto

Departamento de Fitotecnia, Centro de Ciências Agrárias, Universidade Federal do Ceará, Caixa Postal 12168, 60451-970 Fortaleza, CE, Brasil. Send correspondence to F.P.S.

ABSTRACT

The results of a performance test of okra-leaf isolines of cotton (Gossypium hirsutum L.) are reported. The isolines were characterized by measurement of the effects of the qualitative characters on quantitative traits and by comparison with the performance of the recurrent parents. The variability of lines within each isoline was also determined. The okra-leaf isolines were significantly earlier than the normal-leaf isolines, as measured by the percentage of total seed cotton collected at first harvest (23.7 vs. 18.6%, respectively). However, okra-leaf isolines yielded significantly less total seed cotton (21.5 g/ plant vs. 26.4, respectively, an 18.7% decrease).

Keywords: okra-leaf; normal cotton; isolines.

REFERENCES

Andries, J.A. , Jones, J.E., Sloane, L.W. and Marshall, J.G. (1969). Effects of okra leaf shape on boll rot, yield, and other important characters of upland cotton, Gossypium hirsutum L. Crop Sci. 9: 705-710.

Endrizzi, J.E. and Kohel, R.J. (1966). Use of telosomes in mapping three chromosomes in cotton. Genetics 54: 535-550.

Green, J.M. (1953). Sub-okra; a new leaf shape in upland cotton. J. Hered. 44: 229-232.

Ibrahim, M.E. and Buxton, D.R. (1981). Early vegetative growth of cotton as influenced by leaf type. Crop Sci. 21: 639-643.

Jones, J.E. (1982). The present state of the art and science of cotton breeding for leaf-morphological types. Proceedings of Beltwide Cotton Production Research Conferences (Brown, J., ed.). Memphis, TN. 5-7 January. National Cotton/ Council, Memphis, TN, pp. 93-97.

Karami, E. and Weaver, J.B. (1972). Growth analysis of American upland cotton, Gossypium hirsutum L., with different leaf shapes and colors. Crop Sci. 12: 317-320.

Kerby, T.A. and Buxton, D.R. (1976). Fruiting as affected by leaf type and population density. Proceedings of Beltwide Cotton Production Research Conferences (Brown, J., ed.). Las Vegas, NV. 5-7 January. National Cotton/Council, Memphis, TN, pp. 67-70.

Kobel, R.J. and Richmond, T.R. (1971). Isolines in cotton: Effects of nine dominant genes. Crop Sci. 11: 287-289.

Meredith Jr., W.R. and Wells, R. (1986). Normal vs. okra leaf yield interactions in cotton. I. Performance of nearisogenic lines from bulk populations. Crop Sci. 26: 219-222.

Stephens, S.G. (1945). A genetic survey of leaf shape in new world cottons - a problem in critical identification of alleles. J. Genet. 56: 313-330.