Analysis of the phenotypic variability of twenty f₃ biparental populations of bread wheat (<i>Triticum aestivum</i> L.) evaluated under semi-arid environment

Abstract

This research was conducted to screen and analyse the variability within twenty F 3 populations of bread wheat (Triticum aestivum L.) generated by Line x Tester mating design.The results indicated the presence of sufficient variability within and between F 3 populations for the eight measured variables, which represent plant phenology, physiology, yield and yield components. Different populations have been identified to improve the measured variables separately. The number of spikes appeared to be the most important determinant of grain yield.PCA and cluster analyses indicated that the Acsad 1069 /El Wifak and Acsad 1135 /Hidhab, with a relatively high grain yield, aboveground biomass and 1000 grains weight, are the best F 3 populations to improve the productivity. However, Acsad 899 /Rmada and Acsad 1135 /Rmada populations were earlier and had a low number of spikes. These populations had also favorable genes for heat tolerance. Keywords ABSTRACTThis research was conducted to screen and analyse the variability within twenty F 3 populations of bread wheat (Triticum aestivum L.) generated by Line x Tester mating design.The results indicated the presence of sufficient variability within and between F 3 populations for the eight measured variables, which represent plant phenology, physiology, yield and yield components. Different populations have been identified to improve the measured variables separately. The number of spikes appeared to be the most important determinant of grain yield.PCA and cluster analyses indicated that the Acsad 1069 /El Wifak and Acsad 1135 /Hidhab, with a relatively high grain yield, aboveground biomass and 1000 grains weight, are the best F 3 populations to improve the productivity. However, Acsad 899 /Rmada and Acsad 1135 /Rmada populations were earlier and had a low number of spikes. These populations had also favorable genes for heat tolerance.

Studies on the nature of relationships between grain yield and yield-related traits in durum wheat (Triticum durum Desf.) populations

“…The phenotypic correlation coefficients between the variables measured in the F 3 and F 4 generations are given in (2017) and Boussakouran et al (2021) pointed out that the best GY in semi-arid areas are the result of the genetic ability to produce more spikes per unit area associated with good spikes fertility. Slafer et al (2005) as well as Fellahi et al (2017) mentioned that the contribution to NS was more pronounced than that from NG which is formed in a more favorable period. In contrast, Bányai et al (2020) reported that mean grain weight played an important role in determining GY in semi-arid environments.…”

Analysis of the effect of GE interaction on the grain yield and its related traits in rain-fed Algerian durum wheat (Triticum turgidum L. var. durum) grown in contrasting environments

“…The days to heading had significant correlations and negative signs with the weight of 1,000 grains and the grain yield. Fellahi et al (2017) noted that the yield is more linked to the number of spikes, and remains independent of the weight of 1,000 grains which did not show a significant link with the number of spikes. Mohammadi et al (2016) reported that higher grain yields associated with a higher grain weight resulting from early flowering and selection on the basis of the weight of 1,000 grains can further improve the grain yield.…”

Bread Wheat Quality under Limiting Environmental Conditions: I-Molecular Properties of Storage Proteins and Starch Constituents in Mature Grains

“…Four different bread wheat genotypes, selected for their potential tolerance/resistance to hydric stress and rust [25][26][27] by two agricultural research centers operating in dry zones (ICARDA and ACSAD, Bekaa Valley, Lebanon), are delivered by LARI (Bekaa Valley, Lebanon) to be the material of this study. These cultivar pedigrees are shown in Table 1.…”