English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/74005
Compartir / Impacto:
Estadísticas
Add this article to your Mendeley library MendeleyBASE
Ver citas en Google académico
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar otros formatos: Exportar EndNote (RIS)Exportar bibText (RIS)Exportar csv (RIS)
Título

Effect of the embryo genotype on the chilling requirement for overcoming peach seed dormancy

Autor Bruckner, Claudio Horst; Osmar da C. e Silva, J.; Cruz, Cosme Damiao; Wagner Júnior, Américo; Moreno Sánchez, María Ángeles
Palabras clave Prunus persica
selection
stratification
Fecha de publicación oct-2012
EditorInternational Society for Horticultural Science
Citación Bruckner CH, Osmar J, Cruz CD, Wagner A, Moreno MA. Effect of the embryo genotype on the chilling requirement for overcoming peach seed dormancy. Acta Horticulturae 962: 195-201 (2012)
ResumenPeach seeds need chilling temperatures to overcome dormancy. The physiological bases of peach seed dormancy and bud break chilling requirement are considered strongly related, and this relationship could be used for early selection of low chilling genotypes. Peach seeds germinated more quickly under alternating than under constant temperatures. We studied the effect of the embryo genotype on the chilling requirement for seed germination. The seeds evaluated were obtained from the low chilling peach ‘Campinas-1’, which was either open-pollinated or crossed with the high chilling cultivar ‘Miraflores’. The open pollinated ‘Campinas-1’ trees were surrounded by low or very low chill cultivars. The seeds (without the endocarp) were conditioned in sealed, transparent, polyethylene bags containing moist germination paper. The bags were placed in the dark in a growth chamber that alternated between 5 and 10°C every two days. Germination percentages were grouped into four-day classes. Seeds of open-pollinated ‘Campinas-1’ began to germinate twenty days after stratification and reached about 80% germination in the following two days. The germination of ‘Campinas-1’ × ‘Miraflores’ seeds began after 25 days of stratification, reaching 80% after 40 days of stratification. The seeds of the open-pollinated ‘Campinas-1’ germinated over a short period of time (from the 20th to the 27th day), whereas the hybrid seeds had a wider interval of germination time (24th to 47th day), showing the quantitative effect of the seed dormancy trait. The results indicate a strong effect of embryo genotype on the chilling requirement of the seeds, encouraging the selection of low chilling requirement genotypes based on seed dormancy. The alternation of temperatures favourable for overcoming dormancy with temperatures favourable for seed germination can be useful to screen genotypes with fewer differences in chilling requirement.
Descripción 7 Pags., 2 Figs. The definitive version is available at: http://www.actahort.org/index.htm
Versión del editorhttp://www.actahort.org/books/962/962_28.htm
URI http://hdl.handle.net/10261/74005
ISSN0567-7572
Aparece en las colecciones: (EEAD) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
MorenoM_ActaHort_2012.pdf262,04 kBAdobe PDFVista previa
Visualizar/Abrir
Mostrar el registro completo
 


NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.