Evaluation of genetic variability of faba bean (Vicia faba L.)‎ genotypes under different environments

Abstract EN

This study is an attempt to evaluate twenty-two of faba bean genotypes under two locations i.

e.

, Al-Matana and Al-Marashda during 2018-2019 and 2019-2020 seasons.

The results revealed that separate and combined analyses over years as well as years/locations were significant among genotypes for all studied traits.

Moreover, combined means showed the highest genotypes resulted from planting in Al-Matana compared to Al-Marashda locations for all studied traits.

Also, the combined means for number of seeds/plant indicated that the highest mean values in rank were recoded for genotypes no.4 (147.60), no.6 (144.28) and no.9 (142.33) at Al-Matana and no.8 (49.20), no.

9 (48.67) and no.12 (45.00) at Al-Marashda.

The highest mean values of seeds yield/plant, i.

e.

, 127.33, 113.20 and 107.07 g were recorded from genotypes no.

9, 4 and 16 at Al-Matana location.

Likewise, 100-seed weight ranged from 71.33 to 94.86 with an average of 79.37 and from 71.01 to 92.08 with an average of 79.64 g under Al-Matana and Al-Marashda locations, respectively.

The reduction % in number of seeds/plant caused by Al-Marashda condition was very high and larger than Al-Matana condition and reached to 58.40, 72.75 and 61.19 in the first, second years and combined data, respectively.

The stress susceptibility showed that 14 faba bean genotypes were susceptible to the stress and considered susceptible to Al-Marashda location, but the other 8 genotypes considered to be tolerant.

Ten genotypes concern seed yield/plant trait showed highest susceptible index.

These genotypes could be considered to be susceptible under Al-Marashda condition, but the other 12 genotypes could be considered tolerant to Al-Marashda condition.

The slight discrepancy between (PCV) and (GCV) caused high and unreliable estimates of each of broad sense heritability and genetic advance from selection for all studied traits.

Broad sense heritability estimates ranged from 0.97 to 0.98 across all studied traits.