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Genetic assessment of nitrogen use efficiency in cotton [electronic resource].

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Abd El-Moghny, Ahmed M

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Language: English Summary language: Arabic Description: p.403-416Other title:

التقييم الوراثي لكفاءة استخدام النيتروجين في القطن [Added title page title]

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Zagazig journal of agricultural research, 2011 v. 38 (2) [electronic resource].

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In: Zagazig Journal of Agricultural Research 2011.v.38(2)Summary: This study aimed to investigate the genetic variability and the genetic control of nitrogen use efficiency in cotton. A set of parental cotton genotypes and their F 1 progenies under two forms of nitrogen fertilizers were used. All studied genotypes, N treatment and genotype x N. treatment (G X N) interaction showed highly significant differences for nitrogen uptake efficiency, nitrogen utilization efficiency, nitrogen use efficiency and nitrogen translocation to seeds. Nitrogen use efficiency among cotton genotypes ranged from 9.7% to 13.2% and 10.2% to 13.5% under ammonium sulphate and calcium nitrate fertilizers, respectively. The non-additive effects had a considerable role in controlling N use traits in cotton, as confirmed by high estimates of broad sense heritability. The constant parent regression method for estimating dominance relations suggested negative dominance with arithmetic gene action for most N use traits under both N supply forms. Keywords: Cotton, nitrogen use efficiency, N uptake, N utilization, N translocation, genetic variability, heritability.

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This study aimed to investigate the genetic variability and the genetic control of nitrogen use efficiency in cotton. A set of parental cotton genotypes and their F 1 progenies under two forms of nitrogen fertilizers were used. All studied genotypes, N treatment and genotype x N. treatment (G X N) interaction showed highly significant differences for nitrogen uptake efficiency, nitrogen utilization efficiency, nitrogen use efficiency and nitrogen translocation to seeds. Nitrogen use efficiency among cotton genotypes ranged from 9.7% to 13.2% and 10.2% to 13.5% under ammonium sulphate and calcium nitrate fertilizers, respectively. The non-additive effects had a considerable role in controlling N use traits in cotton, as confirmed by high estimates of broad sense heritability. The constant parent regression method for estimating dominance relations suggested negative dominance with arithmetic gene action for most N use traits under both N supply forms. Keywords: Cotton, nitrogen use efficiency, N uptake, N utilization, N translocation, genetic variability, heritability.

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