Hybrid performance and AFLP- based genetic similarity in faba bean |
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| Authors: | Mahmoud?Zeid Chris-Carolin?Sch?n Email author" target="_blank">Wolfgang?LinkEmail author |
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| Institution: | (1) Institute of Agronomy and Plant Breeding, Georg-August-University, D-37075, Göttingen, Germany;(2) State Plant Breeding Institute, University of Hohenheim, D - 70593, Stuttgart, Germany |
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| Abstract: | Successful prediction of heterosis and performance of F1-hybrids from the genetic similarity of their parents based on molecular markers has been reported in several crops and can be very helpful in hybrid breeding. The relationship between genetic similarities based on amplified fragment length polymorphism (AFLP) of 18 European faba bean lines and their hybrid performance and heterosis was investigated. Parental lines, 62 F1-hybrids and their F2-progenies were evaluated in field trials in four environments in Germany for seed yield, 1,000-seed weight and plant height. Results clearly demonstrated a stable superiority of the hybrids over their inbred parents and elite check cultivars, and showed a marked and varying amount of heterosis. Parental seed yield and F2-hybrid yield were promising as predictors for F1-hybrids. AFLP analysis of the 18 inbred lines using 26 EcoRI/MseI primer combinations resulted in 1202 polymorphic fragments. Cluster analysis based on genetic similarity estimates unambiguously identified pedigree-related inbred lines. No clear separation of the 18 inbred lines into subgroups was detected. Correlation coefficients between genetic similarity estimates and either heterosis or F1-hybrid performance were small and not useful. Also correlations between specific genetic similarity and specific combining ability were too small for all traits to be of predictive value. Results showed that AFLP-based genetic similarities are not useful to predict the performance of hybrids or heterosis within the elite European faba bean gene pool. |
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| Keywords: | AFLP faba bean genetic similarity heterosis |
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