Some grain yield parameters of multi-environmental trials in faba bean (Vicia faba) genotypes.
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The objective of this research was to determinate genotype x environment (GE) interaction and also to determine stable faba bean (Vicia faba L.) cultivar(s) for grain yield in Turkey. The study was carried out during two years at six different locations around South Anatolian Region. According to stability analysis results, cultivar 1 (Eresen, 87) was the most stable for grain yield. Among the cultivars, the highest grain yield was obtained from cultivar Eresen 87 (3.21 t ha) across environments. This genotype had regression coefficient ( i b =1) around unity and deviations from regression values ( ij δ =0) around zero. This suggested that both these attributes were responsive to changing environments and could be recommended for favorable environments. © 2010 Friends Science PublishersKeywords:
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seasons to study the effect of five irrigation treatments (I1; normal irrigation "control" ; I2: skipping the second irrigation ; I3: skipping the third irrigation; I4: skipping the fourth irrigation and I5: skipping the fifth irrigation) on yield and seed quality of three cultivars of faba bean (Giza 3, Nubaria 1 and Sakha 3 ).A spilt plot design in a randomized complete blocks arrangement with three replications was used to conduct all trials.Irrigation treatments were randomly assigned for main plots while, faba bean cultivars were randomly arranged for sub plots.Results showed that skipping irrigation at various growth stages had significant effect on all studied traits in both seasons.Skipping the fourth or the fifth irrigation gave the greatest reduction in all yield traits except, seed protein content which increased in both seasons compared with other irrigation treatments.Regarding faba bean cultivars, differences among the three faba bean cultivars were significant except, number of pods plant -1 , pods weight -1 , number of seeds pod -1 and harvest index (%) in both seasons.Giza 3 cultivar gave the highest values all yield traits and seed protein content (%) followed by Nubaria 1.However, Sakha 3 cultivar gave the lowest value of all yield traits and seed protein content (%) in both seasons.For interaction between irrigation regime and faba bean cultivars, all faba bean cultivars were affected by skipping irrigation in both seasons.Giza 3 cultivars was more tolerant to skipping irrigation followed by Nubaria 1 however, Sakha 3 was more sensitive to drought stress.
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Drought stress is one of the most serious problems for agriculture production and sustainability.This study was carried out to investigate seed yield and its components in addition to estimate free proline content in leaves of nine faba bean genotypes with different types grown under three water regimes (well-watered, mild and severe drought).A field experiment was laid out in split plot with three replications during two growing seasons, 2013/14 and 2014/15.The results indicated that drought had pronounce negative effects on yield and its components for all faba bean yield characters, while the effect was positive with leaves proline content.Hassawi 2 out yielded all genotypes under all water treatments and was followed by Giza 843 and ILB 1814 under well irrigation and by Giza Blanka and Giza 843 under high drought stress.Furthermore Hassawi 2 and Nubaria 1 showed higher drought tolerance efficiency (42.3 and 39.5), less drought stress susceptibility index (0.6) and minimum reduction in seed yield 58.3 and 60.4%, respectively.Proline content ranged from 46.3μg/g for Gazira 2 to 69.7 for ILB 1814 under well-watered and from 89.8 for Kamline to 264.0 for Gazira 1 under severe drought.Proline content and seed yield/plant negatively correlated (r = -0.65**)over all treatments and was insignificant under both well-watered (r= 0.62) and high drought stress (r= 0.43).This indicated that proline content was drought stress sensor and could not use as selection parameter for drought tolerant genotype.
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This study was conducted to estimate better-parent and mid-parent heterosis for grain yield and chocolate spot resistance and to determine the direct and indirect effects of yield components on yield of faba bean (Vicia faba L.) in Ethiopia.Ten genetically diverse inbred lines were crossed in a full diallel to produce 90 F 1 progenies.The parents and their 90 F 1 progenies were evaluated in a 10 x 10 alpha lattice design with two replications at three locations.Data were analyzed using the Gardner and Eberhart's analysis II and PATHSAS using SAS program.The maximum heterosis for grain yield (t ha -1 ) was 162.3% for mid-parent and 133.9% over the better parent.Six crosses; NC58 × ILB-4726, ILB-4726 × Kasa, NC58 × BPL-710, ILB-938 × CS-20-DK, ILB-938 × CS-20-DK and CS-20-DK × BPL-710 are recommended for grain yield breeding.Similarly, crosses ILB-4726 × Kasa, ILB-4726 × Bulga-70, CS-20-DK × Gebelcho, NC58 × ILB-4726, Kasa × BPL-710 and ILB-938 × Kasa are recommended for chocolate spot resistance breeding.Three crosses ILB-4726 × Kasa, ILB-4726 × Bulga-070, NC58 × ILB-4726 are recommended for both grain yield and chocolate spot disease resistance breeding in faba bean.Path coefficient analysis showed a significant direct effect of the number of nodes that had pods, plant height and total biomass on grain yield.However, general chocolate spot disease score (GDS) and relative area under disease progress curve (rAUDPC) had negative direct effect and significant negative correlation with grain yield.These results are useful to faba bean breeders for indirect selection of grain yield during the early segregating generation when yield tests cannot be conducted.
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