Algerian National Institute of Agronomic Research INRAA

Sétif, Algeria

Algerian National Institute of Agronomic Research INRAA

Sétif, Algeria
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Haddad L.,Ferhat Abbas University Setif | Bouzerzour H.,Ferhat Abbas University Setif | Benmahammed A.,Ferhat Abbas University Setif | Zerargui H.,Field Crop Institute Agricultural Research Station ITGC | And 7 more authors.
Jordan Journal of Biological Sciences | Year: 2016

Studying genotype × environment interactions and identifying the morphological traits contribution to the interaction are among the important tasks in crop breeding programs. The present investigation aims to analyze grain yield genotype × environment interaction and partitioning it into genotype × year and genotype × sowing date of 15 durum wheat (Triticum durum Desf.) genotypes. Trials were conducted during three consecutive cropping seasons, 2012/13, 2013/14 and 2014/15 and at two seeding dates (early vs late). The results indicate that genotype × year interaction was more significant than that of genotype x sowing date. Correlations of IPCA1 genotypic scores with several morphological plant traits indicated that 1000-kernel weight, number of spikes/m2 and spikes weight/m2 contributed significantly to grain yield interaction. Bousselam and Massara genotypes exhibited a general adaptation, with a grain yield mean above the overall average. Furthermore, the results suggested that the number of the testing years should be greater than the number of the seeding dates per year in studying genotype × environment interaction. Selection of stress tolerant genotypes should be based on 1000-kernel weight, number of spikes and spikes weight/m2 to minimize grain yield interaction. © 2016 Jordan Journal of Biological Sciences. All rights reserved.


El Abidine Fellahi Z.,Ferhat Abbas University Setif | El Abidine Fellahi Z.,Algerian National Institute of Agronomic Research INRAA | Hannachi A.,Algerian National Institute of Agronomic Research INRAA | Bouzerzour H.,Ferhat Abbas University Setif | Benbelkacem A.,Algerian National Institute of Agronomic Research INRAA
Jordan Journal of Biological Sciences | Year: 2015

The present investigation was undertaken to study the inheritance pattern and genetic analysis of some indicators of grain yield in F1 and F2 populations of two bread wheat crosses. The results reflected a satisfactory range of variability within and among the studied generations. Significant positive selection differentials were observed for all characters. High heritability estimates, coupled with high to moderate expected response to selection, were observed in most traits. High predicted genetic gain was observed for grain yield and above ground biomass. The estimated number of genes, involved in the genetic control of these characteristics, varied between 2 to 5, showing partial to over-dominance, suggesting that the selection must therefore be delayed until the F4 or F5 generation. Significant heterotic values in positive direction were found for all characters except thousand-kernel weight in both crosses and number of grains per spike in Acsad899 × Mahon-Demias cross. Inbreeding depression was observed in both crosses for the number of spikes, above-ground biomass and grain yield. The obtained results indicated that the studied crosses would be of interest in the breeding program. It was suggested that the selection for all characters, except for thousand-kernel weight, should be effective in early segregating generations due to additive gene effects. © 2015 Jordan Journal of Biological Sciences.

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