Extent, variation and breeding impact of natural cross-fertilization in German winter faba beans using hilum colour as marker |
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Authors: | Seif Gasim Stefan Abel Wolfgang Link |
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Institution: | 1. Institute of Agronomy and Plant Breeding, Georg-August-University, von Siebold-Stra?e 8, D–37075 G?ttingen, Germany
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Abstract: | Faba bean is a partially allogamous grain legume, mostly sown as spring crop in Central Europe, and in few mild coastal areas
of UK and France as a winter crop. A population with a genetically wide base, conceived and selected for superior winter hardiness
showing promise as winter crop in Germany was evaluated. The reproductive behaviour of this population was evaluated for its
degree of cross-fertilization at five German environments (1999–2001), and inbred lines bred from it, plus one F1 bulk and
further checks, were assessed for variation in cross-fertilization at three German environments (2001). Seed hilum colour,
a dominant-recessive, biallelic locus, was used as a morphological marker. Cross-fertilization (population mean value of 60%)
was shown to be higher than in spring faba beans and was environmentally influenced. Genetic variation was demonstrated, heritability
was high (h2= 0.75), and heterosis was negative. Inbred lines with a cross-fertilization of 70% can be easily bred. Breeding synthetic
cultivars is recommended, their optimum number of components is expected to be higher than the optimum recommended for spring
faba beans.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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Keywords: | breeding cross-fertilization Vicia faba winter faba bean |
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