Effects of N fertilization on yield for low-input production in Spanish wheat landraces (Triticum turgidum L.;Triticum monococcum L.)
A core subset of Spanish durum wheat landraces was evaluated at two nitrogen levels (80 and 220 kg/ha) to identify landrace genotypes adapted to low N production. Yield differences were statistically significant between N levels and among genotypes at both levels. Fifty-one per cent of the landraces yielded significantly more at low than at high N (low-N varieties) while 26% had a positive (high-N varieties) and 23% an indifferent (indifferent-N varieties) response to N fertilizer. No significant agromorphological differences were found among low and high-N varieties at low N level that conferred some advantage to low-N varieties. In contrast, high-N varieties possessed longer grain-filling period under high N level. Phenological characters showed an important influence on yield and on the performance of the varieties within each subgroup. The traits affecting grain yield most positively, mainly the low-N varieties, were long filling period and earliness. Five entries were selected for prebreeding to low N adaptation.
| Main Authors: | , , |
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| Format: | artículo biblioteca |
| Language: | English |
| Published: |
Wiley
2008
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| Subjects: | Triticum turgidum ssp. durum, Landraces, Low-input, Nitrogen, Wheat, Yield, Core subset, |
| Online Access: | http://hdl.handle.net/20.500.12792/5445 http://hdl.handle.net/10261/291921 |
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