Relationship Between Vegetative Structure and Early Bearing in Pear Seedlings

Bagnara, Gian Luca; Maltoni, M.L.; Laghi, M.; Rivalta, L.

doi:10.17660/actahortic.1994.367.13

Cited by 4 publications

(3 citation statements)

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“…It was observed that strong positive correlations existed between the parameters studied. Furthermore, Bagnara [25] performed an experiment on pear seedlings to estimate the relationship between vegetative aspects and early bearing. It was concluded that a short juvenile period in pear is associated with a good efficiency in reserves and dry matter accumulation in woody parts of plant.…”

Section: Juvenile Phase and The Importance Of Plant Breeding In Its I...mentioning

confidence: 99%

Juvenile Period in Plants: A Necessary Tool in Plant Breeding

2022

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Plant juvenile period is the period between seed germination and its ability to achieve and maintain flower Hackett [1]. The duration of this period is determined by genetic and environmental factors Kazakov & Kichina [2], and their interaction can produce different plant behaviours Inmaculada et al. [3]. The benefits of traditional breeding practices however, are difficult to achieve in most crops, due to their long juvenile periods thus necessitating long breeding cycles. Two main strategies have been used in fruit breeding programs to overcome these difficulties which include the development of early selection criteria to eliminate genotypes with a long juvenile period and the shortening of this period by means of forced growth of seedlings. However, the length of the juvenile period has agronomic importance due to its relationship with the length of the unproductive period of the new cultivars subsequently reproduced by vegetative cuttings, an important character for fruit trees Inmaculada et al. [3], Experiments have being done on different crops to reduce the juvenile period by manipulating different growth factors and parameters as rapid flowering would hasten conventional breeding and help realize the benefits from genomic selection methods. The objective of this review is to briefly discuss on the juvenile phase of some crops and its effects on the breeding time thus delaying the improvements of those crops.

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Section: Juvenile Phase and The Importance Of Plant Breeding In Its I...mentioning

confidence: 99%

Juvenile Period in Plants: A Necessary Tool in Plant Breeding

2022

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“…Most of the current selection criteria for JP length are based on highly simplified measurements of tree architecture and considered separately (Hartmann and Engelhorn, 1992;Bagnara et al, 1994;Pritsa et al, 2003;Thompson and Grauke, 2003;Rallo et al, 2008;Moreno-Alias et al, 2010;Toft et al, 2018). This is a possible reason for their limited effectiveness in predicting the future of the complex branching system of the whole-tree.…”

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confidence: 99%

A new approach for early selection of short juvenile period in olive progenies

Hammami

León

Rapoport

et al. 2021

Scientia Horticulturae

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“…Criteria for early selection of seedlings with a short juvenile period have been established for tree crop species such as apple (Alston and Bates, 1980;Visser et al, 1976;Zagaja and Faust, 1983), pear (Bagnara et al, 1994;Visser et al, 1976;Zimmerman, 1977) and, more recently, olive (De la Rosa et al, 2006;Pritsa et al, 2003;Rallo et al, 2008). In this latter species, early elimination of plants with a long juvenile period is based on plant height measured just before the time of transplanting to the field, excluding all seedlings shorter than a threshold height (De la Rosa et al, 2006;Rallo et al, 2008).…”

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Optimizing Early Flowering and Pre-selection for Short Juvenile Period in Olive Seedlings

Moreno-Alías¹,

Rapoport²,

López³

et al. 2010

horts

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In recent years, the juvenile period of olive seedlings has been reduced by diverse forcing and pruning-formation techniques, but it is still a major drawback for breeding. Plant height at the time when seedlings are transplanted to the field has been found effective for obtaining earlier flowering, but the value of this parameter varies widely among olive breeding programs. We evaluated different transplant dates, taking into account mean plant height and age, with the aim of determining the optimum parameters for achieving early flowering and easy plant management and, at the same time, for the early elimination of genotypes with a long juvenile period. A mean seedling height of ≈100 cm at the time of planting in the field provided the best results in terms of shortening the juvenile period and facilitating handling of the seedlings. For all dates tested, seedling height at transplanting was effective as a pre-selection criterion for the early elimination of genotypes with long juvenile periods, with slight improvement in effectiveness with advancing transplant date.

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Relationship Between Vegetative Structure and Early Bearing in Pear Seedlings

Cited by 4 publications

References 0 publications

Juvenile Period in Plants: A Necessary Tool in Plant Breeding

Juvenile Period in Plants: A Necessary Tool in Plant Breeding

A new approach for early selection of short juvenile period in olive progenies

Optimizing Early Flowering and Pre-selection for Short Juvenile Period in Olive Seedlings

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