Abstract
BackgroundThis study aimed to development new faba bean hybrids resistant to chocolate spot disease and using them in breeding programs. Six faba bean genotypes were crossed in a diallel system excluding reciprocals during three growing seasons of 2017/18, 2018/19 and 2019/20 growing seasons.ResultsResults scored high variability among genotypes (parents and their crosses) in most studied characters. All characters were affected by inbreeding and most crosses recorded high significant in all characters especially the positive significance of resistance to chocolate spot disease (gain) was 5 for all studied resistance characters.ConclusionsAll studied plant growth and yield characters were affected negatively by chocolate spot disease. Moreover, it can be concluded that the commercial cost of producing hybrid seed can be reduced by growing F1 or directly.
Highlights
This study aimed to development new faba bean hybrids resistant to chocolate spot disease and using them in breeding programs
Chocolate spot disease is one of the biotic stresses, and it considers the most important fungal disease that caused by Botrytis fabae (Harrison 1988; Rhaiem et al 2002; Abo-Hogazy et al 2012)
It widely spread in the northern region of the Nile Delta of Egypt, where low temperature and high relative humidity and it reduced the yield by 22–25% (Khalil et al 1993)
Summary
This study aimed to development new faba bean hybrids resistant to chocolate spot disease and using them in breeding programs. Chocolate spot disease is one of the biotic stresses, and it considers the most important fungal disease that caused by Botrytis fabae (Harrison 1988; Rhaiem et al 2002; Abo-Hogazy et al 2012). It widely spread in the northern region of the Nile Delta of Egypt, where low temperature and high relative humidity and it reduced the yield by 22–25% (Khalil et al 1993). These include breeding for disease resistance (Khalil et al 1993; Zaki 2010), fungicide control (Khaled et al 1995), Methods The field experiments of the present study were carried out at Gemmiza Research Station, Agriculture Research Center (ARC), Egypt, during three successive seasons 2017/18, 2018/19, and 2019/20
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