MORPHOLOGICAL TRAITS DETERMINING DROUGHT TOLERANCE IN LOCAL AND CIMMYT MAIZE INBREDS (ZEA MAYS L.)

Article Id: ARCC632 | Page : 160 - 163
Citation :- MORPHOLOGICAL TRAITS DETERMINING DROUGHT TOLERANCE IN LOCAL AND CIMMYT MAIZE INBREDS (ZEA MAYS L.).Agricultural Science Digest.2012.(32): 160 - 163
Uttam Chandel
Address : Shivalik Agricuture Research & Extension Centre, CSKHPKV, Kangra 176 001, India

Abstract

A total number of 190 lines of maize comprising of 85 inbreds derived from local land races and 105 lines from CIMMYT were evaluated for drought tolerance. Observations on different morphological parameters including anthesis -silking interval (ASI), plant height (cm), leaf senescence, leaf rolling, and grain yield/plant (g) were recorded by limiting irrigation at different growth stages, viz; at knee height, grain filling , before flowering and both at flowering and grain filling and compared with normal irrigated crop (control). Different morphological traits were computed with yield accounting for the drought tolerating ability. Plant height was affected severely when irrigation was restricted at knee high stage. It was observed that in majority of the genotypes screened anthesis-silking interval increases during stress and severe stress conditions. In general, local inbreds were observed more drought tolerant as compared to CIMMYT inbreds. Local inbreds KI-30, KI-55, KI-57 and KI-61 with shorter ASI could resist the moisture stress to some extent.

Keywords

Drought tolerance Maize Zea mays.

References

  1. Bolanos, J. and Edmeades G.O. (1993). Eight cycles of selection for drought tolerance in lowland tropical mazie. Field Crops Res., 31:233-252.
  2. Bolanos, J. and Edmeades G.O. (1996). The importance of the anthesis-silking interval in breeding for drought tolerance in tropical maize. Field Crops Res., 48: 65-80.
  3. Edmeades G.O., Chapman, J.M. and Bolanos, J. (1995) Recent advances in breeding for drought tolerance in mazie. In: West and Central Africa Regional Maize and Cassava Workshop, Cotonde, Benin Republic.
  4. Cakir, R. (2004). Effect of water stress at different developmental stages on vegetative and reproductive growth of corn. Field Crops Res., 89:1-16.
  5. Hall, A.J., Vilella, F., Trapani, N. and Chimenti, C. (1981). The effects of water stress and genotypes on the dynamics of pollen shedding and silking in maize. Maydica, 26:19-38.
  6. Shaw, R.H. (1977) .Climatic requirement. In: Corn and Corn Improvement. (Sprague, G.F. ed.) Am. Soc. Agron. Mono. 18:591-623.
  7. Singh, N.N. and Sarkar, K.R. (1985). Physiological, genetical basis of drought tolerance in maize. Exptl. Genet.,
  8. 1:80-89.
  9. Subramanyam, M. (1992). Genetics of some physiological and morphological parameters for drought tolerance in maize (Z.mays L.). Ph.D. Thesis, IARI, New Delhi.
  10. Westgate, M.E. and Boyer, J.S. (1985). Osmotic adjustment and inhibition of leaf, root, stem and silk growth at low water potentials in maize. Planta, 164:540-549.

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