Stability Analysis of Bread Wheat Genotypes under Different Nitrogen Fertilizer Levels | ||||
| Journal of Plant Production | ||||
| Article 14, Volume 8, Issue 2, February 2017, Page 261-275 PDF (487.52 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2017.39617 | ||||
 View on SCiNiTO | ||||
| Author | ||||
M. M. A. Ali 
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| Agron. Dept., Fac. Agric., Zagazig Univ., Egypt | ||||
| Abstract | ||||
| Sixteen bread wheat genotypes were evaluated for days to 50% heading, plant height, 1000-grain weight, grain yield and biological yield under six varied environments which are the combination between, two seasons 2009/2010 and 2010/2011 and three nitrogen fertilizer levels (50, 80 and 110 kg N/fad.). The combined analyses of variance showed highly significant differences were registered between genotypes, environments as well as G x E for all studied traits. Low nitrogen stress significantly reduced these traits for all wheat genotypes under 1st and 2nd compared with the 3rd level. Joint regression analysis of variance revealed highly significant G x E “linear” for all characters. Environment + Genotype x Environment (E + G x E), Environment (linear) and G x E (linear) were highly significant for all studied characters. Phenotypic stability parameters revealed that wheat genotypes, Gemmeiza 7 was highly adapted to favorable environments for days to 50% heading and 1000-grain weight; Gemmeiza 9 for plant height, grain yield and biological yield; Misr1 and Line1 for grain yield and biological yield. Genotypic stability parameters indicated that wheat genotypes Gemmeiza 9 was highly adapted to favorable environments for plant height, 1000-grain weight, grain yield and biological yield; Giza 168, Line 1 and Misr 1 for grain yield and biological yield and Line 7 for plant height and 1000-grain weight. The AMMI analysis of variance showed highly significant difference between genotypes, environments, G x E, IPCA1 and IPCA2. AMMI stability value (ASV) and GE biplot revealed that, the most desired and stable genotypes were Sakha 93, Gemmeiza 7 and Line 8 for days to 50% heading; Line 8, Line 2, Sids1 and Gemmeiza 9 for plant height; Gemmeiza 9, Sids 1, Gemmeiza 7 and Line 4 for 1000-grain weight; Line1, Gemmeiza 10, Giza 168, Sakha 94 and Line 3 for grain yield and Giza 168, Gemmeiza 9, Line1, Misr1 and Gemmeiza 10 for biological yield. According to GGE biplots, the ideal genotype was Gemmeiza 7 for days to 50% heading; Gemmeiza 10 for plant height; line 7 for 1000-grain weight; Giza 168 for grain yield and Misr 1 for biological yield. | ||||
| Keywords | ||||
| Wheat; Genotype x environment; phenotypic and genotypic stability; AMMI; nitrogen stress | ||||
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