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A study of variations and genotypic and phenotypic correlations in bread wheat under effect of three nitrogen levels | ||
| journal of kerbala university | ||
| Article 1, Volume 8, Issue 2, 2012, Pages 8-22 PDF (0 K) | ||
| Abstract | ||
| A field trail was conducted at the experimental farm of Ibn Al-Betar secondary school in Al-Hussania district in Kerbala province during winter season of 2011-2012.The objectives were to study the variation genotypic and phenotypic correlations under three nitrogen levels to determine the best characteristics selected as indices with grain yield of wheat (Triticum aestivum L.).The experiment was arranged in a split plot design within RCBD with three replications . Nitrogen levels (69,138 and 207 Kg N /ha)were assigned in the main plots, wheat cultivars (Al-Tahady ,Al-Adnania, Al-Iraq, , IPA 95,Ashur,Sali,Al fatehand ,Sham6)were assigned in the subplots. Results showed that, higher genotypic and phenotypic variation on all nitrogen levels were obtained from plant height ,number of tillers /m2,nitrogen use efficiency ,nitrogen harvest index ,number of spikes /m2,biomass yield and harvest index ,thus ,the improvement of these traits will be more effective. nitrogen use efficiency and harvest index gave in (69,138 Kg N /ha)can be adopted as selection indices. At 207 Kg N /ha, each of the following : nitrogen use efficiency, nitrogen harvest efficiency and harvest index can be used as selection criterion to improve grain yield . | ||
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