GENETIC ANALYSIS FOR EARLINESS AND GRAIN YIELD OF BREAD WHEAT (Triticum aestivum L.) UNDER HEAT STRESS

Abdallah, Eman; Salem, A. H.; Ali, M. M. A.; Kamal, K. Y.

doi:10.21608/zjar.2019.51867

	GENETIC ANALYSIS FOR EARLINESS AND GRAIN YIELD OF BREAD WHEAT (Triticum aestivum L.) UNDER HEAT STRESS
Zagazig Journal of Agricultural Research
Article 2, Volume 46, Issue 6, November 2019, Page 1769-1784 PDF (821.72 K)
Document Type: Original Article
DOI: 10.21608/zjar.2019.51867
View on SCiNiTO
Authors
Eman Abdallah ; A. H. Salem; M. M. A. Ali; K. Y. Kamal
Agron. Dept., Fac. Agric., Zagazig Univ., Egypt
Abstract
This investigation aimed to study mean performance, genotypic variances, types of gene action and heritability for earliness, yield and components in four bread wheat crosses using six populations i.e. (P₁, P₂, F₁, F₂, BC₁ and BC₂) under different thermal conditions. Wheat crosses populations were sown on 19^th November and 3^rdJanuary at the Experimental Farm, Faculty of Agriculture, Zagazig University, Egypt in a randomized complete block design in 2017/2018 season. Scaling test provide evidence of non-allelic interaction in controlling all studied characters in the four crosses on both sowing dates except No. of spiklets/spike in the 3^rd and 4^thcrosses and grain yield/plant in the 2^nd and 3^rd crosses on normal sowing date, indicated the presence of epistasis and the digenic model proved to be satisfactory in explaining the inheritance of the previous characters in the corresponding crosses. Narrow-sense heritability estimates recorded high values (>50%) for days to heading in the 1^st and 2^nd crosses on normal sowing date and the 3^rd cross on both sowing dates; days to maturity in the 1^st and 4^th on normal sowing date and the 3^rd cross on both sowing dates, No. of tillers/plant in the 3^rd cross on both sowing dates and the 2^nd and 4^th crosses on normal sowing date; No. of spiklets/spike in all crosses on both sowing dates except the 1^st and 2^nd crosses on normal sowing date; No. of grains/spike in the 2^nd cross on both sowing dates, the 4^th cross on normal sowing and the 1^st cross on late sowing date; weight of grains/spike in the 2^nd cross on both sowing dates and the 3^rd on normal sowing date, 1^st and 4^th crosses on late sowing date and grain yield/plant in the 1^st cross on both sowing dates and the 3^rd and 4^th crosses on late sowing date.
Keywords
Genetic component; heat stress; heritability; six populations; Tritium aestivum L; Wheat


Statistics Article View: 307 PDF Download: 378