Determination of the time of flower evocation in kiwifruit vines

Snelgar, W. P.; Manson, P. J.

doi:10.1080/01140671.1992.10418062

Cited by 23 publications

(17 citation statements)

References 16 publications

(16 reference statements)

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“…Floral evocation is generally thought to occur during the first growing season as first-order axillary buds develop, starting with the oldest, most mature buds (Snelgar & Manson 1992;Walton et al 1997Walton et al ,2001. During that time, there are a number of factors that can affect flowering in the following spring.…”

Section: Ld Treatments May Affect Flower Evocationmentioning

confidence: 99%

“…Sequential shoot-defoliation experiments have been used by several groups to address this question (Davison 1974;Snelgar & Manson 1992;Snowball 1996). However, shootdefoliation experiments not only remove the source of the inductive signal but also the source of photosynthate and therefore the results should be considered tentative.…”

Section: Introductionmentioning

confidence: 99%

“…none the less, using this methodology evocation is generally accepted to occur during the first growing season of bud development. Davison (1974) suggested evocation starts in late summer and continues through until autumn, though the data of Snelgar & Manson (1992) indicate that the meristems contained within the older, more developed first-order buds undergo evocation earlier, at the beginning of summer. Snowball (1996) giving more weight to the effect of the loss of carbohydrate postulated that evocation may not occur until immediately before flower differentiation in the spring of the second growing season.…”

Section: Introductionmentioning

confidence: 99%

“…More recent work, based on morphological development (Walton et al 1997) and floral homeotic gene expression studies (Walton et al 2001), supports the concept that first-order kiwifruit buds undergo evocation early in their development, starting in late spring of the first growing season. evocation appears to occur progressively along each shoot, from the base to the apex, near the time the subtending leaf ceases expansion (Snelgar & Manson 1992). Consequently, when experimental treatments such as defoliation are applied early in the growing season, the reduction in flowering is greater on the distal portions of canes (Snelgar & Manson 1992).…”

Section: Introductionmentioning

confidence: 99%

“…evocation appears to occur progressively along each shoot, from the base to the apex, near the time the subtending leaf ceases expansion (Snelgar & Manson 1992). Consequently, when experimental treatments such as defoliation are applied early in the growing season, the reduction in flowering is greater on the distal portions of canes (Snelgar & Manson 1992).…”

Section: Introductionmentioning

confidence: 99%

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Flowering of kiwifruit (Actinidia deliciosa) is reduced by long photoperiods

Snelgar¹,

Clearwater

Walton

2007

New Zealand Journal of Crop and Horticultural Science

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Mature kiwifruit (Actinidia deliciosa 'Hayward') vines grown under standard orchard management were exposed to 16-h photoperiods from the longest day in summer until after leaf fall in autumn. Photoperiod extension was achieved with tungsten halogen lamps that produced 2-8 µmols m -2 s -1 photosynthetically active radiation. Long day treatments did not affect fruit dry matter or fruit weight at harvest during the growing season that the treatments were applied or during the following growing season. However, flowering was reduced by 22% during the spring following treatment application. As this reduction in flowering was not accompanied by a decrease in budbreak, the long day effect is not consistent with a delay in the onset of winter chilling. It is suggested therefore, that the observed reduction in flowering may be because of a diminution of floral evocation.

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Section: Ld Treatments May Affect Flower Evocationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Flowering of kiwifruit (Actinidia deliciosa) is reduced by long photoperiods

Snelgar¹,

Clearwater

Walton

2007

New Zealand Journal of Crop and Horticultural Science

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Shoot Axillary Bud Morphogenesis in Kiwifruit (Actinidia deliciosa)

et al. 1997

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Molecular breeding of flower load related traits in dioecious autotetraploid Actinidia arguta

Mertten,

McKenzie,

Souleyre

et al. 2024

Mol Breeding

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Flowering plants exhibit a wide range of sexual reproduction systems, with the majority being hermaphroditic. However, some plants, such as Actinidia arguta (kiwiberry), have evolved into dioecious species with distinct female and male vines. In this study, we investigated the flower load and growth habits of female kiwiberry genotypes to identify the genetic basis of high yield with low maintenance requirements. Owing to the different selection approaches between female and male genotypes, we further extended our study to male kiwiberry genotypes. By combining both investigations, we present a novel breeding tool for dioecious crops. A population of A. arguta seedlings was phenotyped for flower load traits, in particular the proportion of non-floral shoots, proportion of floral shoots, and average number of flowers per floral shoot. Quantitative trait locus (QTL) mapping was used to analyse the genetic basis of these traits. We identified putative QTLs on chromosome 3 associated with flower-load traits. A pleiotropic effect of the male-specific region of the Y chromosome (MSY) on chromosome 3 affecting flower load-related traits between female and male vines was observed in an A. arguta breeding population. Furthermore, we utilized Genomic Best Linear Unbiased Prediction (GBLUP) to predict breeding values for the quantitative traits by leveraging genomic data. This approach allowed us to identify and select superior genotypes. Our findings contribute to the understanding of flowering and fruiting dynamics in Actinidia species, providing insights for kiwiberry breeding programs aiming to improve yield through the utilization of genomic methods and trait mapping.

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Determination of the time of flower evocation in kiwifruit vines

Cited by 23 publications

References 16 publications

Flowering of kiwifruit (Actinidia deliciosa) is reduced by long photoperiods

Flowering of kiwifruit (Actinidia deliciosa) is reduced by long photoperiods

Shoot Axillary Bud Morphogenesis in Kiwifruit (Actinidia deliciosa)

Molecular breeding of flower load related traits in dioecious autotetraploid Actinidia arguta

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