جستجوی مقالات مرتبط با کلیدواژه "آزادسازی" در نشریات گروه "زراعت"

In order to introduce and promote high quality commercial cultivars in Iran, the apricot breeding program began in 1996 with the aim of achieving the desired cultivars. After conducting preliminary experiments, supplementary evaluations and regional experiments, the Parsi variety was released in 2018. This new variety is obtained from the crossing between Ghermez Shahroud × Nasiri 90 cultivars. The fruit of this variety has standard quality for drying and fresh market properties such as flesh firmness, long post-harvest life, free stone, high TSS (19%), red over color and good taste. On the other hand, the productivity and fruit quality of this variety is higher than most of other local genotypes. Also its flesh firmness of fruit, fresh consumptions and its T.S.S. is more than its parent Ghermez Shahroud cultivar. Parsi is self-incompatible and Ourdubad 90, Haft Baradaran and Jalil cultivars have been determined as the best pollinizers for its pollination. Based on the high quality of fruit and good yield of these varieties, they can be used as a commercial cultivar in the appropriate and well adapted areas along with Parsi cultivar.

In order to increase time interval of the fruit supply and to produce variability and benefit from the marketable characteristics of superior apricot germplasm, six promising genotypes selected among native genotypes of East Azerbaijan province, Iran were evaluated from 2004 to 2018. In these studies, the generative and vegetative characteristics of these genotypes were assessed during the implementation of seven research projects and studied genotype were compared with the cv. Ordubad 90 (as control). The results showed that fruit of genotype No. 190 was ripened at least 20 days later than control. Although the mean differences of fruit volume and weight of this genotype were non-significant with control but its flesh firmness in the physiological ripening stage was significantly more than the control (3 kgcm-2). Also, a significant difference was observed between the weight ratio of fruit/stone of genotype 190 and control having ratios of 25.6 and 16.6, respectively. The fruit of this genotype with 25% moisture reduction was dried ideally and its organoleptic characteristics remained stable for at least one year in cold storage conditions. Studies also revealed that the superiority of the characteristics of yield efficiency, relative coloring of fruit, ripening date, storage period, shelf life and transportability of genotype No. 190 in comparison with control and therefor this genotype was released and introduced as "Sahand 97" commercial name to the Iran's horticultural community.

Nima variety, is resulted from the selection and purification of single plants in segregating generations derived from the cross Okapi´Modena. Single plants in F2 and their segregating generations were cultivated for five consecutive years until pure-lines were obtained in F6 generation. Selected pure lines were evaluated in a preliminary yield trial conducted in Hamedan in 2008-09. The result showed that seed yield of line SW102 (Nima) was 7% higher than Okapi (check cultivar). The study of selected lines in Karaj, Hamedan, Arak, Khosroshah near Tabriz and Islamabad-e-Gharb during 2009 and 2010 showed that seed yield of line SW102 (Nima) was 18% higher than Okapi. Based on stability parameters of environmental coefficient of variation and mean and variance of ranks for grain yield, SW102 had a good yield stability across different environments in all experinments. Evaluation of resistance to common oilseed rape diseases in Iran indicated relative resistance of SW102 to blackleg and sclerotinia diseases. Results of on- farm trials in Hamedan in 2012 showed that SW102 with grain yield of 4983 kgha-1 produced the highest seed yield. Results of on- farm trials in Isfahan showed that grain yield of SW102 and Okapi under drought stress decreased 13.4 and 23.6%, respectively, compared to normal irrigation. Based on desirable characteristics of line SW102 such as high grain and oil yield, good adaptability, relative tolerance to terminal drought stress and resistance to blackleg and sclerotinia stem rot compared to Okapi (check), this line was released as Nima and is recommended for cultivation in cold and moderately cold regions of Iran.