Madalina Butac, Mihai Botu, Madalina Militaru, Craisor Mazilu, Ion Dutu and Silvia Nicolae
In Romania, work on identification, conservation and evaluation of fruit genetic resources activities was initiated in 1970 in order to limit the loss of biodiversity. There are rich sources of germplasm located in two research centres: RIFG Pitesti with 642 accessions and UCv-SCDP Vâlcea with 361 accessions, representing wild species, local populations, named cultivars, breeder’s selections and rootstocks. Observations were made according to the IBPGR Prunus descriptors updated by the ECP/GR Prunus Working Group. The following genetic resources from the Piteşti and Vâlcea collections were used in a breeding programme in the development of several plum cultivars: ‘Grase de Becs’, ‘Carpatin’, ‘Ialomiža’, ‘Kirke’, ‘Wilhelmina Späth’ (for resistance / tolerance to Plum pox virus); ‘Vinete romāneşti’, ‘Tuleu timpuriu’, ‘Anna Späth’ (for late blooming), ‘Tuleu gras’, ‘Vâlcean’ (for fruit quality), ‘Stanley’, ‘Pescăruş’, ‘Centenar’ (for productivity), and ‘Diana’ (for self-fertility). The plum rootstock breeding programme used the following genotypes as sources of genes: ‘Rosior văratec’, ‘Brompton’, ‘Renclod Verde’, ‘Pixy’, ‘Saint Julien A’, ‘Albe mici’, ‘Scolduş’, ‘Porumbar’, etc. Breeding using the germplasm in these collections resulted in the release of 40 cultivars and 11 generative and vegetative rootstocks.
Daina Feldmane, Silvija Ruisa, Valentīna Pole, Madalina Butac and Madalina Militaru
Fruit set is a crucial stage in the process of yield formation, which is influenced by environmental factors, growing technologies and peculiarities of genotype. The aim of the study was to evaluate the quality of pollen (viability and germination capacity) and the effect of weather before and during flowering on fruit set in sour cherry cultivars ‘Latvijas Zemais’, ‘Zentenes’, ‘Bulatnikovskaya’, and ‘Orlica’. The research was carried out in Institute of Horticulture (Latvia University of Agriculture) in 2009-2016. Good pollen viability and germination was found for cultivars ‘Latvijas Zemais’ and ‘Bulatnikovskaya’. Negative effects of increasing air temperature (in the range of 7.7 to 17.5 °C) and relative humidity (in the range of 51.4 to 88.5%) was observed for all cultivars during flowering. The effects of diurnal temperature fluctuations, wind and the amount of days with precipitation differed depending on sour cherry cultivar.
Dorin Sumedrea, Alina Florea, Mihaela Sumedrea, Adrian Asănica, Radu Coman, Mădălina Militaru, Emil Chiţu, Mădălina Butac, Florin Cristian Marin and Mirela Calinescu
The objective of preservation is to keep fruit fresh as long as possible after harvesting, without major physical, chemical or biological changes in their composition. The experimental factors underlying it the organization scheme are: A Factor - apple varieties: ‘Idared’, ‘Goldrush’, ‘Florina’, ‘Pinova’, ‘Dalinette’, ‘Golden reinderes‘,‘Golden lassa‘,‘Ariane‘; B factor - storage methods, with three graduations: classical method - low temperature and high humidity (1-4ºC; humidity 85-90%), Janny MT box storage method (1-4 ºC; 95-100% humidity; O2 1-3%; CO2 2-5%), fruit control equipment box-pallets (1- 4ºC; 90-95% humidity; O2 1-3%; CO2 2-5%) and factor C - fruit storage period -at 3, 4 and 5 months after harvest respectively. On the average of the cultivars taken in the study, on observe the tendency to increase the total dry mater and total sugar content, and decrease the total tritrable acidity and vitamin C with the prolongation of the fruit storage period.