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Cereal Research Communications

, Volume 34, Issue 4, pp 1239–1246 | Cite as

Low nitrogen tolerance in tropical quality protein maize (Zea mays L.): value of predictive traits

  • P. MonneveuxEmail author
  • G. Cabon
  • C. Sánchez
Article

Abstract

In the tropics, maize (Zea mays L.) is often grown under low N conditions. Information on the respective role of N uptake and partitioning at anthesis in determining grain yield under low N is scarce. Senescence traits have been proposed as secondary traits to select for low N tolerance, but the stability of their association with yield under different environmental conditions has been rarely described. In the present study we analyzed the associations between grain yield, N uptake and partitioning at anthesis, dry matter matter partitioning, and senescence traits during two seaons in QPM (quality protein maize) hybrids. Association between grain yield and N uptake at anthesis, when found, was mainly explained by a close relationship between grain yield and above-ground biomass. No relationship was found between grain yield and N partitioning at anthesis. In both seasons grain yield was significantly positively associated with ear to above-ground biomass and ear to tassel weight ratios. The magnitude of the correlation between grain yield and senescence traits highly depended on climatic conditions.

Keywords

Zea mays L. N deficiency N partitioning N uptake senescence QPM (quality protein maize) 

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Copyright information

© Akadémiai Kiadó, Budapest 2006

Authors and Affiliations

  1. 1.CIMMYTMexico D.F.Mexico
  2. 2.ENESADDijon cedexFrance

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