GRAIN YIELD AND NITROGEN USE EFFICIENCY IN SPRING WHEAT (TRITICUM AESTIVUM L.) HYBRIDS UNDER DIFFERENT NITROGEN FERTILIZATION REGIMES
Yükleniyor...
Dosyalar
Tarih
2022
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Increasing nitrogen use efficiency in modern agriculture is important for obtaining high yields
and reducing production costs and environmental pollution. Globally, price reduction and envi ronmental concerns advocate a lower use of nitrogen (N) fertilizer for wheat (Triticum aestivum L.)
crop, especially for wheat hybrids. The objective of this study was to assess combining ability
at different N levels for agronomic traits and nitrogen use efficiency (NUE) via diallel analysis
in wheat hybrids. Four spring wheat cultivars were used to produce a 4 × 4 full diallel cross
with the reciprocals. Parents of various origins and their diallel F2
-hybrids were evaluated in
field under 0, 120 and 240 kg ha-1 N doses. The results showed that there was much genotypic
variance among nitrogen doses for the NUE, grain yield, agronomic and quality traits. Signifi cant genotypic differences in the yield, protein yield, protein content and NUE were identified
among hybrids. General combining ability effect of parents for the grain yield and protein con tent, and specific combining ability effect of hybrids for the NUE and grain yield significantly
changed depending on nitrogen levels. Both genetic and reciprocal effects showed interaction
with nitrogen doses in determining the NUE of wheat. Because of the reciprocal x N interaction,
the hybrids’ reciprocal responses to increasing nitrogen levels revealed positive or negative
changes in the yield and NUE characteristics. The winner among hybrids was identified for
grain yield and grain nitrogen yield (GNY) at the optimum N level according to the GGE biplot
analysis. Inqualab91 x Chils was found to be desirable for selecting NUE traits.
Açıklama
Anahtar Kelimeler
wheat, nitrogen, diallel, biplot
Kaynak
Journal of Elementology
WoS Q Değeri
Q4
Scopus Q Değeri
Cilt
27
Sayı
3
