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Effect of genetic-environment intraction on phenology of some Persian walnut (Juglans regia L.) genotypes | ||
| Crop Breeding Journal | ||
| مقالات آماده انتشار، پذیرفته شده، انتشار آنلاین از تاریخ 02 تیر 1399 | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22092/cbj.2020.128539.1045 | ||
| نویسندگان | ||
Asghar Soleimani 1؛ Vali Rabiei  1؛ Darab Hassani2؛ Mohammad Reza Mozaffari3
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| 1University of Zanjan, Zanjan- Iran | ||
| 2Temperate Fruits Research Center, Horticultural Science Research Institute (HSRI), Agricultural Research, Education and Extension Organization (AREEO). Karaj- Iran | ||
| 3Agricultural and Natural Resources Research Center of Kerman, Agricultural Research, Education and Extension Organization (AREEO). Kerman-Iran. | ||
| چکیده | ||
| Walnut (Juglans regia L.) is one of the most important horticultural crops grown in Iran. In order to determine the phenology of walnut genotypes in different years and characterize its relationship with climatic conditions, this study has been carried out in Temperate Fruits Research Center, HSRI, AREEO, Karaj, Iran. The phenological characteristics of 39 selected superior walnut genotypes were compared with Chandler, Jamal and Rond de Montignac cultivars during 2012-2018. Based on the results, the overall average leafing dates of genotypes varied from March 15-29 in the studied years. The ‘Z16’ had the earliest leafing date (March 13) and most fluctuation together with ‘Kr95’ (24 and 25 days, respectively). Latest leafing date and least fluctuation was belong to ‘Ronde de Montignacʼ with average leafing date in April 13 and four days of variation in different years. The average leafing dates in ‘Chandler’, ‘88-1, ‘88-2’ were in April 6-8. The average pollen shedding, in different years, started in genotypes from March 29 to April 12. While the average of pistillate flowers receptivity changed from April 2 to April 11. The effect of years was not significant in nut ripening. The overall fruit ripening average was on August 24-25 in different years. However, the ripening dates for genotypes varied from August 15 in ‘Kr111’ to September 16 in ‘Chandler’. The temperature of March showed to have a crucial effect on bud break, catkin development and pollen shedding, and pistillate flowers development and receptivity period. Leafing dates showed to be more affected by years effects respect to other phenological traits. The leafing dates changed 5.5 and 2.8 days in early and late leafing genotypes with 1 °C increase in average temperature respectively. | ||
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