Articles
Study on the causes of fruit misshapen in the first crop of ‘Qianmei No.1’
Article number
1465_64
Pages
433 – 440
Language
English
Abstract
‘Qianmei No.1’ is one of the main strawberry cultivars in Southwest China, but the deformity rate of its first-crop fruits is high in production.
In order to explore the causes of the first-crop fruit deformity of ‘Qianmei No.1’ and find effective solutions, the phenological periods of ‘Qianmei No.1’, ‘Qianmei No.2’, ‘Akihime’ and ‘Benihoppe’ were observed, and their biological traits, pollen characteristics and fruit morphology were systematically analyzed and comprehensively evaluated.
The results showed that the pollen germination rate of ‘Qianmei No.1’ exceeded 70% during the first flowering period, which was significantly higher than that of ‘Akihime’ and ‘Benihoppe’ at the same stage, and the pollen germination rate reached 88.43% by mid-December.
The pollen tube growth length of ‘Qianmei No.1’ varied significantly at different times, with the shortest length (82.93 μm) recorded on November 24, which was shorter than that on November 20 and 28, closely related to the sudden temperature drop on November 22. Under conventional cultivation, the deformed fruit rate of ‘Qianmei No.1’ ranged from 21.06 to 42.44%, significantly higher than that of other cultivars.
In 2023, when temperatures were higher, the deformed fruit rate decreased by 50.38% compared to 2020. When elevated substrate cultivation and artificial pollination were applied, the deformed fruit rates of ‘Qianmei No.1’ dropped to 8.45% and 0-20%, respectively.
These findings indicate that the high deformed fruit rate in the first crop of ‘Qianmei No.1’ is primarily due to the susceptibility of pollen tube growth to temperature and humidity fluctuations in greenhouses, and effective measures to reduce the deformity rate include humidity control and heat preservation, artificial pollination, and elevated substrate cultivation.
In order to explore the causes of the first-crop fruit deformity of ‘Qianmei No.1’ and find effective solutions, the phenological periods of ‘Qianmei No.1’, ‘Qianmei No.2’, ‘Akihime’ and ‘Benihoppe’ were observed, and their biological traits, pollen characteristics and fruit morphology were systematically analyzed and comprehensively evaluated.
The results showed that the pollen germination rate of ‘Qianmei No.1’ exceeded 70% during the first flowering period, which was significantly higher than that of ‘Akihime’ and ‘Benihoppe’ at the same stage, and the pollen germination rate reached 88.43% by mid-December.
The pollen tube growth length of ‘Qianmei No.1’ varied significantly at different times, with the shortest length (82.93 μm) recorded on November 24, which was shorter than that on November 20 and 28, closely related to the sudden temperature drop on November 22. Under conventional cultivation, the deformed fruit rate of ‘Qianmei No.1’ ranged from 21.06 to 42.44%, significantly higher than that of other cultivars.
In 2023, when temperatures were higher, the deformed fruit rate decreased by 50.38% compared to 2020. When elevated substrate cultivation and artificial pollination were applied, the deformed fruit rates of ‘Qianmei No.1’ dropped to 8.45% and 0-20%, respectively.
These findings indicate that the high deformed fruit rate in the first crop of ‘Qianmei No.1’ is primarily due to the susceptibility of pollen tube growth to temperature and humidity fluctuations in greenhouses, and effective measures to reduce the deformity rate include humidity control and heat preservation, artificial pollination, and elevated substrate cultivation.
Publication
Authors
R.F. Li, S.P. Yang, H.Y. Ma, B. Shu, R. Qiao
Keywords
strawberry, misshapen fruit, pollen germination, pollen tube growth, artificial pollination
Groups involved
- Division Vine and Berry Fruits
- Working Group Strawberry Culture and Management
- Division Sustaining Horticulture in a Changing World
- Division Horticulture for Human Health
- Division Plant Genetic Resources, Breeding and Biotechnology
- Division Greenhouse and Indoor Production Horticulture
- Division Precision Horticulture and Engineering
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