Agronomical and quality traits of runner bean germplasm and implications for breeding |
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Authors: | M Santalla AB Monteagudo AM González AM De Ron |
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Institution: | (1) Legumes Breeding Group, Misión Biológica de Galicia, CSIC, P.O. Box 28, 36080 Pontevedra, Spain |
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Abstract: | White runner bean landraces are greatly appreciated in the North highlands of Spain due to their excellent culinary seed quality.
Runner bean cultivars are grown like pole beans. Diversity within a runner bean collection of 31 accessions from the Iberian
Peninsula (Spain and Portugal) was examined using morphological, agronomical and seed quality traits. Landraces showed significant
differences for most of the agronomical and seed quality traits studied except for seeds per pod, water absorption, seed coat
tenderness and floury texture. Runner bean landraces showed sufficient variability to select inbred lines for future breeding.
Genotype × environment interaction was significant for days to first flowering, days to first dry pod, seeds per pod and seed
length. The majority of physical and nutritional seed quality traits studied which are important to determine the commercial
value of a variety were not subject to environmental influences. Different selection pressures affecting to the runner bean
genetic material could have occurred in several regions of the Iberian Peninsula. Extra-large and high yielding runner bean
germplasm was identified and represents a valuable source of genetic diversity that has potential for development of improved
cultivars to be chosen for commercialisation.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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Keywords: | culinary quality genetic resources Phaseolus coccineus phenotypic variation |
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