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Assessment of runner bean (Phaseolus coccineus L.) germplasm for tolerance to low temperature during early seedling growth

AuthorsRodiño Míguez, Ana Paula ; Lema Márquez, Margarita ; Pérez Barbeito, Marlene ; Santalla Ferradás, Marta ; Ron Pedreira, Antonio Miguel de
KeywordsCold tolerance
Genetic improvement
Issue DateMay-2007
CitationEuphytica 155(1-2): 63-70 (2007)
AbstractThe runner bean requires moderately high temperatures for optimum germination and growth. Low temperature at sowing delays both germination and plant emergence, and can reduce establishment of beans planted early in the growing season. The objective of this work was to identify potential runner bean germplasm with tolerance to low temperature and to assess the role of this germplasm for production and breeding. Seeds of 33 runner bean accessions were germinated in a climate-controlled chamber at optimal (17°C-day/15°C-night) and at sub-optimal (14°C-day/8°C-night) temperature. The low temperature tolerance was evaluated on the basis of germination, earliness, ability to grow and vigor. Differences in agronomical characters were significant at low temperatures for germination, earliness, ability to grow and early vigor except for emergence score. The commercial cultivars Painted Lady Bi-color, Scarlet Emperor, the Rwanda cultivar NI-15c, and the Spanish cultivars PHA-0013, PHA-0133, PHA-0311, PHA-0664, and PHA-1025 had the best performance under cold conditions.
Description8 páginas, 3 tablas.
Publisher version (URL)http://dx.doi.org/10.1007/s10681-006-9301-6
Appears in Collections:(MBG) Artículos
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