Stability Analysis for Nitrogen Use Efficiency in Bread Wheat (Triticum aestivum L.)
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Date
2016-08
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University of Agricultural Science, Dharwad
Abstract
Thirty bread wheat (Triticum aestivum L.) genotypes were evaluated to determine the stable performance for grain yield in relation with nitrogen use efficiency at four levels of nitrogen (0, 50, 100 and 150 kg/) application across the three environments viz., Dharwad, Nippani and Ugar during rabi, 2015-16.
Stability model Additive Main Multiplicative Interaction (AMMI) showed significant differences among the genotypes, environment and genotype x environment interaction. Genotype x environment interaction further partitioned into principal component analysis 1 which was significant. Mean grain yield across the different levels of nitrogen indicated that grain yield increased from 2,485 kg/ha to 3,704 kg/ha with increase in nitrogen application from 50 kg/ha to 100 kg/ha but decreased at 150 kg/ha nitrogen. The mean nitrogen use efficiency increased from zero nitrogen level (14.94) to 50 kg/ha nitrogen (15.27) application then decreased with the increased application of nitrogen from 50 kg/ha to 150 kg/ha.
The AMMI biplot analysis indicated that following genotypes were superior for grain yield with nitrogen use efficiency and were stable across the three environments at different levels of nitrogen application:
Zero level: DBW 14, Third SATYN 9402, and Second WYCYT 34
50 kg/ha: WH 1022, Third SATYN 9402, Fifth CISA HTEM 10211 and Second WYCYT 34
100 kg/ha: Fifth CISA HTEM 10211 and Fifth CISA HTEM 10212
150 kg/ha: Fifth CSISA HTEM 10228, Fifth CISAHTEM 10211, HD 2189 and HD 2967.
Ugar environment was better for expression of grain yield and nitrogen use efficiency. These identified stable genotypes can be used as donor parents for transferring high yield with high nitrogen use efficiency to the locally well adapted varieties.