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Apricot floral development: Keys for a good yield

AutorAlburquerque, Nuria ; Egea, José ; Burgos Ortiz, Lorenzo
Fecha de publicación2007
EditorGlobal Science Books
CitaciónInternational Journal of Plant Developmental Biology 1(2): 265-273 (2007)
ResumenDifferent aspects related to floral development have a close link to fruit set failures in apricot and other fruit trees. In this work we review studies on flower bud development, pollen viability and germinability, ovule development and longevity, fertilization, as well as on molecular bases of self- and cross-(in)compatibility. A high flower buds drop and a scarce flower bud production of some apricot cultivars affect negatively fruit set. Climatic conditions during flowering influence pollen germination and pollen tubes growth. A delay in the ovule development at anthesis has been found as genotype-dependent in apricot and this trait has been related to low percentages of fertilisation. Also differences in fruit set observed between cultivars may be related to the ability of the ovules to develop and mature after anthesis. Abnormal embryo sacs or ovules have been observed in apricot at different stages of flower development, which is a direct cause of low fruit set. Different plant growth regulators can be useful to regulate different processes. The knowledge of the incompatibility phenotype for many apricot cultivars has allowed advising about the planting of single-cultivar orchards. The study of the inheritance of this and other traits in apricot and other fruit trees has allowed planning of hybridisations to minimise or eliminate the production of undesirable seedlings, increasing the efficiency of the breeding programmes. Furthermore, molecular studies and characterization of S-alleles in apricot have allowed the development of molecular markers for self-(in)compatibility, a successful tool for breeding. All together, these studies on the floral development in apricot have provided valuable information to help select the appropriate cultivars for producers and to avoid losses caused by an inadequate cultivar selection.
Descripción9 pages.
Versión del editorhttp://www.globalsciencebooks.info/JournalsSup/07IJPDB_1_2.html
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