Selection of Pecan Cultivars Aiming to Release Vigorous and Heat Stress Tolerant Rootstocks
With the development of pecan orchards in subtropical regions of Iran in recent years, it is very important to release vigorous and hot weather tolerant rootstocks for grafting. For this purpose, 15 pecan cultivars were evaluated in terms of seed germination rate, seedling growth rate, and summer he...
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| Format: | Article |
| Language: | English |
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Islamic Azad University
2022-02-01
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| Series: | Journal of Nuts |
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| Online Access: | http://ijnrs.damghaniau.ac.ir/article_688309_20649623d2d3b6701bb93337277a3f26.pdf |
| _version_ | 1818083629293633536 |
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| author | Fereidoon Ajam Gard |
| author_facet | Fereidoon Ajam Gard |
| author_sort | Fereidoon Ajam Gard |
| collection | DOAJ |
| description | With the development of pecan orchards in subtropical regions of Iran in recent years, it is very important to release vigorous and hot weather tolerant rootstocks for grafting. For this purpose, 15 pecan cultivars were evaluated in terms of seed germination rate, seedling growth rate, and summer heat stress damage in 2019-2021 at Safiabad Agricultural Research Center. The cultivars were included ‘GraTex’, ‘Peruque’, ‘Comanche 4M’, ‘10J’, ‘Wichita 6J’, ‘GraKing’, ‘Choctaw’, ‘Apache’, ‘Wichita 7J’, ‘Comanche 5M’. ‘Stuart 2J’, ‘Stuart 4J’, ‘6M’, ‘Mahan’ and ‘Mohawk’. The evaluated traits were seed germination rate, determination of seedling production index per kilogram of seed, seedling height and diameter, and amount of seedling damage due to heat stress. The results showed that ‘Peruque’, ‘Apache’, ‘Mohawk’, and ‘Wichita 7J’ were preferred with the possibility of producing 126, 86, 75, and 74 seedlings per kilogram of seed, respectively. The results of the height and diameter of the seedlings showed that ‘Peruque’, ‘Stuart 2J’, ‘Comanche 5M’, ‘Mahan’ and ‘Apache’ were vigorous. The heat stress was so intense in 2021 that even several decades old and large pecan trees were damaged. Meteorological information of Safiabad station showed that, the temperature was above 45 degrees Celsius for 435 hours in 2021. The results showed that the seedlings of ‘Peruque’ and ‘Apache’ were the most tolerant and ‘GraTex’ and ‘Mohawk’ were very sensitive. According to the evaluation of seedlings of pecan cultivars in the years, 2019 to 2021, ‘Peruque’ and ‘Apache’ for pecan rootstock production are recommended. |
| first_indexed | 2024-12-10T19:41:02Z |
| format | Article |
| id | doaj.art-d3bfd5322f8f4e4db53bb737eda82b0e |
| institution | Directory Open Access Journal |
| issn | 2383-319X 2383-3416 |
| language | English |
| last_indexed | 2024-12-10T19:41:02Z |
| publishDate | 2022-02-01 |
| publisher | Islamic Azad University |
| record_format | Article |
| series | Journal of Nuts |
| spelling | doaj.art-d3bfd5322f8f4e4db53bb737eda82b0e2022-12-22T01:35:59ZengIslamic Azad UniversityJournal of Nuts2383-319X2383-34162022-02-01131577010.22034/jon.2022.1942678.1139688309Selection of Pecan Cultivars Aiming to Release Vigorous and Heat Stress Tolerant RootstocksFereidoon Ajam Gard0Safiabad Agricultural Research, Education and Natural Resources Center, Agricultural Research, Education and Extension Organization (AREEO), Dezful, IranWith the development of pecan orchards in subtropical regions of Iran in recent years, it is very important to release vigorous and hot weather tolerant rootstocks for grafting. For this purpose, 15 pecan cultivars were evaluated in terms of seed germination rate, seedling growth rate, and summer heat stress damage in 2019-2021 at Safiabad Agricultural Research Center. The cultivars were included ‘GraTex’, ‘Peruque’, ‘Comanche 4M’, ‘10J’, ‘Wichita 6J’, ‘GraKing’, ‘Choctaw’, ‘Apache’, ‘Wichita 7J’, ‘Comanche 5M’. ‘Stuart 2J’, ‘Stuart 4J’, ‘6M’, ‘Mahan’ and ‘Mohawk’. The evaluated traits were seed germination rate, determination of seedling production index per kilogram of seed, seedling height and diameter, and amount of seedling damage due to heat stress. The results showed that ‘Peruque’, ‘Apache’, ‘Mohawk’, and ‘Wichita 7J’ were preferred with the possibility of producing 126, 86, 75, and 74 seedlings per kilogram of seed, respectively. The results of the height and diameter of the seedlings showed that ‘Peruque’, ‘Stuart 2J’, ‘Comanche 5M’, ‘Mahan’ and ‘Apache’ were vigorous. The heat stress was so intense in 2021 that even several decades old and large pecan trees were damaged. Meteorological information of Safiabad station showed that, the temperature was above 45 degrees Celsius for 435 hours in 2021. The results showed that the seedlings of ‘Peruque’ and ‘Apache’ were the most tolerant and ‘GraTex’ and ‘Mohawk’ were very sensitive. According to the evaluation of seedlings of pecan cultivars in the years, 2019 to 2021, ‘Peruque’ and ‘Apache’ for pecan rootstock production are recommended.http://ijnrs.damghaniau.ac.ir/article_688309_20649623d2d3b6701bb93337277a3f26.pdfcarya illinoinensisseedlingsvegetative growthwarm weather stress |
| spellingShingle | Fereidoon Ajam Gard Selection of Pecan Cultivars Aiming to Release Vigorous and Heat Stress Tolerant Rootstocks Journal of Nuts carya illinoinensis seedlings vegetative growth warm weather stress |
| title | Selection of Pecan Cultivars Aiming to Release Vigorous and Heat Stress Tolerant Rootstocks |
| title_full | Selection of Pecan Cultivars Aiming to Release Vigorous and Heat Stress Tolerant Rootstocks |
| title_fullStr | Selection of Pecan Cultivars Aiming to Release Vigorous and Heat Stress Tolerant Rootstocks |
| title_full_unstemmed | Selection of Pecan Cultivars Aiming to Release Vigorous and Heat Stress Tolerant Rootstocks |
| title_short | Selection of Pecan Cultivars Aiming to Release Vigorous and Heat Stress Tolerant Rootstocks |
| title_sort | selection of pecan cultivars aiming to release vigorous and heat stress tolerant rootstocks |
| topic | carya illinoinensis seedlings vegetative growth warm weather stress |
| url | http://ijnrs.damghaniau.ac.ir/article_688309_20649623d2d3b6701bb93337277a3f26.pdf |
| work_keys_str_mv | AT fereidoonajamgard selectionofpecancultivarsaimingtoreleasevigorousandheatstresstolerantrootstocks |