This study investigated ovule and anther structure of the `Trevatt Blue' variety of apricot (Prunus armeniaca) using bright field microscopy following reports of low fruit set. Ovules and anthers from fertile `Moorpark' and `Trevatt Knight' flowers were compared with those of the `Trevatt Blue'. In the `Moorpark' and `Trevatt Knight' ovules, all reproductive structures were present including em...

Apricot (Prunus armeniaca L.) is an important fruit species in Turkey with high level of economic value. Sequence related amplified polymorphism (SRAP) markers were used for the first time to determine genetic diversity and relationships among Turkish and some foreign apricot cultivars. A total 87 bands were obtained from SRAP analysis and 63 of them (73%) were polymorphic. Similarity values am...

New foreign rootstocks for peaches [Prunus persica (L.) Batsch] are now being introduced into the United States through commercial nurseries for future sales to stone fruit growers. Almost all of these rootstocks are complex Prunus L. hybrids that are propagated vegetatively. Past experience with foreign Prunus rootstocks has shown that extensive testing is critical to avoid potential problems ...

 constriction and staining properties by aceto-iron-hematoxylin were analyzed for Prunus species of apricot (Prunus armeniaca L.), plum (P. cerasifera Ehrh.) and a natural new hybrid known as “TANASGOL” (P. cerasifera × P. spp.). The obtained root tips from germinated seeds at 4–6 °C and young seedlings were pretreated in hydroxyquinoline solution with 50 drops of DMSO. All species had 2n=2x=16...

Increasing germplasm erosion requires the recovery and conservation of traditional cultivars before they disappear. Here we present a particular case in Spain where a thorough prospection of local fruit tree species was performed in the 1950s with detailed data of the origin of each genotype but, unfortunately, the accessions are no longer conserved in ex situ germplasm collections. However, fo...

Apricot (Prunus armeniaca) was a thriving tree crop in California during the first half of the 20th century, with nearly 100,000 A under production at its peak in 1926 Foytik [1]. Since that time, production acreage has declined steadily to its current level of approximately 10,000 A. Harvested apricot volume in California has averaged just over 54,000 T annually over the last three reported ye...

Over the last 20 years stone fruit rootstock development has begun shifting from seedling to clonal types, many of interspecific origin. Publicly funded breeding programs have produced most of these rootstocks due to the time, cost, and risk associated with their development; however, private industry is emerging as a significant contributor of many of the newer rootstocks. Particularly notewor...

apricot (prunus armeniaca l.) is a species particularly prone to erratic fruit set, and its flower bud drop has been repeatedly reported in different cultivars and growing conditions. a number of potential causes have been explored, but a clear main cause remains elusive. in this study, fruit set was determined for 11 apricot cultivars (‘precoce de tyrinthe’, ‘feriana’, ‘beliana’, ‘priana’, ‘be...