Articles
Yield and morphological response of two segregating lines of Rubus fruticosus with seminal origin to three times of cold treatment
Article number
1444_16
Pages
113 – 120
Language
English
Abstract
Production technologies allow blackberry growers to remain competitive in a growing and increasingly demanding global market.
The production of long-cane blackberries (second-year canes treated with artificial cold) under high tunnels allows producers to achieve high yields and enter the market at crucial times to maximize their profits.
This study aimed to understand the morphological and yield responses of two distinct segregating lines of open-pollinated blackberry varieties (OPs), originating from seeds, subjected to three different durations of cold storage.
Long-canes from two segregation lines, one floricane fruiting-type and one primocane fruiting-type, A7 and A8, respectively, were exposed to three cold treatments: F1 – 1300 h; F2 – 2000 h; F3 – 2700 h of cold storage, at a temperature range from 0 to 2°C and 92% of relative humidity.
All plants were placed in the cold storage rooms at the same time (12th January 2023) and removed on three distinct dates (21st March, 19th April, and 16th May 2023). After cold storage, plants were randomly allocated in the tunnels in batches of 18 plants per repetition (three repetitions per treatment), totaling 324 evaluated plants.
Weekly, phenological assessments were conducted until the mature fruit stage was reached, alongside morphological characterization and production evaluations.
The results obtained revealed differential and almost opposing responses of the two segregating lines to the applied treatments.
For the A7 line, treatment F1 demonstrated superior performance, yielding 88.1 fruits plant-1 with an average weight of 3.55 g fruit-1. Conversely, the A8 line showed better outcomes in treatment F2, yielding 97.8 fruits plant-1 and weighing 3.45 g each, suggesting that 2700 h of cold storage may not be necessary to have a better yield.
The A8 line showed a greater tendency to emit root shoots, as well as treatment F3, which led to a higher number of shoots emitted.
Regarding phenological evolution, the cold treatments exerted an inverse effect on the families, with the A7 line demonstrating an increased requirement for heat as the duration of cold treatment extended.
In contrast, in the A8 line, heat requirements decreased with prolonged exposure to low temperatures.
Overall, the A8 line fruits were of superior quality.
However, for both families, we can conclude that the cold treatments did not significantly influence fruit quality.
This research can further aid growers in making informed decisions regarding the scheduling of plant entry and exit from cold storage, as well as in achieving enhanced yields.
The production of long-cane blackberries (second-year canes treated with artificial cold) under high tunnels allows producers to achieve high yields and enter the market at crucial times to maximize their profits.
This study aimed to understand the morphological and yield responses of two distinct segregating lines of open-pollinated blackberry varieties (OPs), originating from seeds, subjected to three different durations of cold storage.
Long-canes from two segregation lines, one floricane fruiting-type and one primocane fruiting-type, A7 and A8, respectively, were exposed to three cold treatments: F1 – 1300 h; F2 – 2000 h; F3 – 2700 h of cold storage, at a temperature range from 0 to 2°C and 92% of relative humidity.
All plants were placed in the cold storage rooms at the same time (12th January 2023) and removed on three distinct dates (21st March, 19th April, and 16th May 2023). After cold storage, plants were randomly allocated in the tunnels in batches of 18 plants per repetition (three repetitions per treatment), totaling 324 evaluated plants.
Weekly, phenological assessments were conducted until the mature fruit stage was reached, alongside morphological characterization and production evaluations.
The results obtained revealed differential and almost opposing responses of the two segregating lines to the applied treatments.
For the A7 line, treatment F1 demonstrated superior performance, yielding 88.1 fruits plant-1 with an average weight of 3.55 g fruit-1. Conversely, the A8 line showed better outcomes in treatment F2, yielding 97.8 fruits plant-1 and weighing 3.45 g each, suggesting that 2700 h of cold storage may not be necessary to have a better yield.
The A8 line showed a greater tendency to emit root shoots, as well as treatment F3, which led to a higher number of shoots emitted.
Regarding phenological evolution, the cold treatments exerted an inverse effect on the families, with the A7 line demonstrating an increased requirement for heat as the duration of cold treatment extended.
In contrast, in the A8 line, heat requirements decreased with prolonged exposure to low temperatures.
Overall, the A8 line fruits were of superior quality.
However, for both families, we can conclude that the cold treatments did not significantly influence fruit quality.
This research can further aid growers in making informed decisions regarding the scheduling of plant entry and exit from cold storage, as well as in achieving enhanced yields.
Authors
S. Lenehan, M.F. Roque, M. Mota, T. Valdiviesso, P.B. Oliveira
Keywords
blackberries, cold storage, genotypes, long-canes, yield
Groups involved
- Division Vine and Berry Fruits
- Division Plant-Environment Interactions in Field Systems
- Division Horticulture for Human Health
- Working Group Vaccinium Species and Management
- Working Group Rubus and Ribes Species and Management
- Working Group Kiwifruit Culture and Management
- Working Group Strawberry Culture and Management
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