PERFORMANCE AND STABILITY OF SOME BREAD WHEAT GENOTYPES FOR GRAIN YIELD, PROTEIN AND GLUTEN CONTENTS UNDER DIFFERENT ENVIRONMENTAL CONDITIONS
El-Marakby, A.M.; Afaf, M. Tolba; S.H. Saleh; F.S. Abdel Samie; A. El-Gabry, Yasser;
Abstract
Seventeen genotypes (G) of bread wheat (14
promising lines and 3 commercial cultivars) were
evaluated for mean performance and stability of
grain yield/plant, grain protein content and dry gluten percentage under 16 environments (two locations (L), two sowing dates(D) and four fertilization
treatments (F)). The results confirmed the existence of considerable genetic variation among genotypes and their performance was significantly
affected by different environments for the studied
traits. Kalubia locations recorded the highest mean
values for grain yield/plant while; Fayoum location
recorded the highest mean values for the two quality traits. Yield and quality traits were significantly
increased on early (recommended) sowing dates
at Kalubia and Fayoum locations than on late sowing dates. Applying biofertilizer only gave the lowest mean performance in all traits, but adding mineral N besides biofertilizer markedly increased
grain yield/plant and the two quality traits. However, insignificant differences existed between the
rate of nitrogen recommended (80kg N/fed.) and
the rate of (biofertilizer + 60kgN/fed.), indicating
that biofertilizer could be efficient in reducing costs
of the expensive mineral N and reducing environmental pollution. On an average highest values of
grain yield/plant were recorded by the promising
wheat lines no. 10 (24.57 g), no. 9 (22.50 g), and
no. 11 (21.64 g) as compared to the best check
cultivar Giza 168. Meantime, this cultivar surpassed the other genotypes in protein and dry gluten percentages. Concerning phenotypic stability,
the three superior lines no. 10, 9 and 11 gave the
highest mean values (x¯) of grain/plant coupled
with significant regression coefficient (bi) values
higher than unity and significant deviation from
regression (S2di), thus they considered specifically
adapted to favourable environments.
promising lines and 3 commercial cultivars) were
evaluated for mean performance and stability of
grain yield/plant, grain protein content and dry gluten percentage under 16 environments (two locations (L), two sowing dates(D) and four fertilization
treatments (F)). The results confirmed the existence of considerable genetic variation among genotypes and their performance was significantly
affected by different environments for the studied
traits. Kalubia locations recorded the highest mean
values for grain yield/plant while; Fayoum location
recorded the highest mean values for the two quality traits. Yield and quality traits were significantly
increased on early (recommended) sowing dates
at Kalubia and Fayoum locations than on late sowing dates. Applying biofertilizer only gave the lowest mean performance in all traits, but adding mineral N besides biofertilizer markedly increased
grain yield/plant and the two quality traits. However, insignificant differences existed between the
rate of nitrogen recommended (80kg N/fed.) and
the rate of (biofertilizer + 60kgN/fed.), indicating
that biofertilizer could be efficient in reducing costs
of the expensive mineral N and reducing environmental pollution. On an average highest values of
grain yield/plant were recorded by the promising
wheat lines no. 10 (24.57 g), no. 9 (22.50 g), and
no. 11 (21.64 g) as compared to the best check
cultivar Giza 168. Meantime, this cultivar surpassed the other genotypes in protein and dry gluten percentages. Concerning phenotypic stability,
the three superior lines no. 10, 9 and 11 gave the
highest mean values (x¯) of grain/plant coupled
with significant regression coefficient (bi) values
higher than unity and significant deviation from
regression (S2di), thus they considered specifically
adapted to favourable environments.
Other data
Title | PERFORMANCE AND STABILITY OF SOME BREAD WHEAT GENOTYPES FOR GRAIN YIELD, PROTEIN AND GLUTEN CONTENTS UNDER DIFFERENT ENVIRONMENTAL CONDITIONS | Authors | El-Marakby, A.M.; Afaf, M. Tolba; S.H. Saleh; F.S. Abdel Samie; A. El-Gabry, Yasser | Keywords | Bread wheat (Triticum aestivum, L);Genotypes;Sowing dates;Locations;Biofertilizer;Phenotypic stability | Issue Date | 1-Jan-2015 | Journal | Arab Universities Journal of Agricultural Sciences | Volume | 23 | Issue | 1 | Start page | 75 | End page | 89 | DOI | DOI: 10.21608/ajs.2015.14561 |
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