2024-03-28T15:19:52Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/184992009-11-10T23:00:00Zcom_10261_72com_10261_6col_10261_325
Chilling and heat requirements of apricot cultivars for flowering
Ruiz, David
Campoy, José Antonio
Egea, José
Comisión Interministerial de Ciencia y Tecnología, CICYT (España)
Consejo Superior de Investigaciones Científicas (España)
Dormancy
Environment
Prunus armeniaca L.
Chilling requirements
Heat requirements
Flowering date
10 pages, 4 figures, 4 tables.
Chilling requirements for breaking of dormancy and heat requirements for flowering were studied for 3 successive years in 10 apricot cultivars which spanned the range of flowering times in this species. Different methods for estimating chilling requirements were evaluated and compared, and correlations between chilling requirements, heat requirements and flowering date were established. The cultivars examined showed a range of chilling requirements (chill units, CU), between 596 CU (Currot) and 1266 CU (Orange Red), though most of them showed chilling requirements between 800 and 1200 CU. The results obtained in different years by the Utah and Dynamic models were more homogeneous with respect to the hours below 7 °C model. The heat requirements for flowering ranged between 4078 and 5879 growing degree hours (GDH). The apricot cultivars showed important differences concerning flowering date, and the results indicate a high positive correlation between chilling requirements and flowering date, as well as a negative correlation between chilling requirements for breaking of dormancy and heat requirements for flowering.
The authors are grateful to the Spanish Comisión Interministerial de Ciencia y Tecnología (CICYT) Project
AGL2001-1122-CO2-01 for financial support. D.R. is the holder of a grant from the
Consejo Superior de Investigaciones Científicas (reference I3PBPD
2001-1).
Peer reviewed
2009-11-11T10:43:42Z
2009-11-11T10:43:42Z
2007-11
artículo
http://purl.org/coar/resource_type/c_6501
Environmental and Experimental Botany 61(3): 254-263 (2007)
0098-8472
http://hdl.handle.net/10261/18499
10.1016/j.envexpbot.2007.06.008
http://dx.doi.org/10.13039/501100007273
http://dx.doi.org/10.13039/501100003339
en
http://dx.doi.org/10.1016/j.envexpbot.2007.06.008
none
259768 bytes
application/pdf
Elsevier