الفهرس 
Title: Performance of Parents, F1 and F2 for Tolerance to Orobanche and Botrytis in Faba Bean and Molecular characterization of Host and Parasite
ContantsOnly 14 pages are availabe for public view
 |  | from | 180 |  |  |
| | | from | 180 | | |
Abstract
This study was conducted during 2015/2016, 2016/2017 and 2017/2018 seasons. The faba bean, Viciafaba genotypes: Nubaria 1 (P₁ - Major), Giza 843 (P₂ {u2013} Equina), Sakha 4 (P₃ {u2013} Equina), Camilina (P₄ {u2013} Minor), Misr 1 (P₅{u₂₀₁₃} Equina) and Cairo 33 (P₆ {u2013} Equina) were crossed in a diallel system excluding reciprocals, to widen genetic base, to estimate heterosis, GCA, SCA, correlation coefficient and to provide materials for selecting good combinations from segregating generations. The six parents, 15 F1{u2019}s and 15 F₂{u₂₀₁₉}s were employed in the study and planted in open naturally Orobanche-infested field. Also, artificial inoculation with Botrytis fabae was done. characters studied were: flowering date, plant height, branches per plant, pods per plant, seeds per plant, seed yield per plant, 100-seed weight, tolerance criteria for Orobanche and disease resistance parameters. Variability was observed among genotypes (parents and crosses).There was significance in tolerance characters of Orobanche. The seed yield components showed F₂ to be higher than F₁ due to remaining heterosis and transgressive segregants.This indicates that F₁ and F₂ may be grown commercially to reduce cost of hybrid seed production. There was positive significance of resistance to chocolate spot disease (gain) in all studied resistance characters. Moreover, there were positive significant correlation between yield characters and all plant growth traits, while, all studied plant growth and yield characters were affected negatively by chocolate spot disease.There were similarity between faba bean host and Orobanche parasite and this may indicate some kind of complementary genes system controlling interaction of the host and the parasite. Moreover, there were similarity and high relationship between all tested Orobanche plants indicating that every Orobanche plant has its unique genotype which was partially similar to other plants in the same plot.