Levels of Inbreeding in Highbush Blueberry Cultivars1

Hancock, James F.; Siefker, J. H.

doi:10.21273/hortsci.17.3.363

Cited by 14 publications

(3 citation statements)

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“…The genotypes used and their compositions and origins are listed in Table 4. Species compositions were derived using published pedigree analyses [20][21][22]. z Compositional values were rounded to the nearest whole percent.…”

Section: Plant Materialsmentioning

confidence: 99%

Asymmetric Reciprocal Crossing Behavior of an Andean Blueberry (V. meridionale) × Lingonberry (V. vitis-idaea) Hybrid

Ehlenfeldt

Ogden

Rowland

2022

Plants

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The fertility and crossing behavior of a tetraploid hybrid of 4x Andean blueberry (V. meridionale) and lingonberry (V. vitis-idaea) was evaluated through a series of crosses. Crosses of the hybrid with highbush blueberry produced divergent results. When used as a female with V. corymbosum males, virtually all offspring were hexaploid, most likely arising from 2n = 4x = 48 female gametes, and 1n = 2x = 24 male gametes. However, when used as a male, tetraploid hybrids were produced, resulting from 1n = 2x = 24 gametes from each parent. To further examine this crossing behavior, the 4x V. meridionale—V. vitis-idaea interspecific hybrid was pollinated with 6x V. virgatum (rabbiteye blueberry). Analogous to the previous crosses, 7x hybrids were produced from the joining of 2n = 4x = 48 female gametes with 1n = 3x = 36 male gametes. Such reciprocal crossing asymmetry is unprecedented. The ability to produce both 6x and 4x offspring from the same V. corymbosum parents allows the potential of bridging a V. meridionale hybrid genotype to both the tetraploid (V. corymbosum) and hexaploid (V. virgatum) commercial crop levels.

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Section: Plant Materialsmentioning

confidence: 99%

Asymmetric Reciprocal Crossing Behavior of an Andean Blueberry (V. meridionale) × Lingonberry (V. vitis-idaea) Hybrid

Ehlenfeldt

Ogden

Rowland

2022

Plants

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“…Northern and southern highbush blueberry cultivars have similar levels of heterozygosity (Brevis et al, 2008) and are consequently similarly prone to EID. Domesticated blueberry cultivars have become increasingly inbred over time (Hancock and Siefker, 1982;Ehlenfeldt, 1994), which may increase their susceptibility to EID, indicating that the benefits of cross pollination will likely increase as new cultivars continue to be developed. Understanding the breeding history of modern cultivars and their levels of inbreeding will help to predict how well each cultivar will perform in single-cultivar plantings and which cultivars should be co-planted for effective cross-pollination.…”

Section: Pollination Requirementsmentioning

confidence: 99%

Toward evidence-based decision support systems to optimize pollination and yields in highbush blueberry

DeVetter

Chabert

Milbrath

et al. 2022

Front. Sustain. Food Syst.

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Highbush blueberry (Vaccinium spp.) is a globally important fruit crop that depends on insect-mediated pollination to produce quality fruit and commercially viable yields. Pollination success in blueberry is complex and impacted by multiple interacting factors including flower density, bee diversity and abundance, and weather conditions. Other factors, including floral traits, bee traits, and economics also contribute to pollination success at the farm level but are less well understood. As blueberry production continues to expand globally, decision-aid technologies are needed to optimize and enhance the sustainability of pollination strategies. The objective of this review is to highlight our current knowledge about blueberry pollination, where current research efforts are focused, and where future research should be directed to successfully implement a comprehensive blueberry pollination decision-making framework for modern production systems. Important knowledge gaps remain, including how to integrate wild and managed pollinators to optimize pollination, and how to provide predictable and stable crop pollination across variable environmental conditions. In addition, continued advances in pesticide stewardship are required to optimize pollinator health and crop outcomes. Integration of on- and off-farm data, statistical models, and software tools could distill complex scientific information into decision-aid systems that support sustainable, evidence-based pollination decisions at the farm level. Utility of these tools will require multi-disciplinary research and strategic deployment through effective extension and information-sharing networks of growers, beekeepers, and extension/crop advisors.

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“…Some inbreeding has probably occurred in all blueberry breeding programs as a result of recurrent selection in which only a few genotypes were used in the initial popopulation and relatively few clones were used as parents in each cycle of selection. Hancock and Siefker (5) reported that coef ficients of inbreeding (F) ranged from 0.00 to 0.25 for 63 highbush blueberry cultivars released by public agencies in the United States. Inbreeding levels in rabbiteye breed ing programs are also substantial, since the cultivated germplasm traces back almost en tirely through 2 to 4 cycles of recurrent se lection to the 4 landrace V. ashei cultivars 'Ethel', 'Myers', 'Clara', and 'Black Giant' (6).…”

mentioning

confidence: 99%

Inbreeding Depression in Rabbiteye Blueberries

Lyrene

1983

horts

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Three populations of 2-year-old seedlings of rabbiteye blueberry (Vaccinium ashei Reade) produced by one generation of selfing were compared for seedling survival and vegetative vigor with comparable hybrid populations. Over the 3 populations, the inbred seedlings as compared to hybrids averaged lower in survival (30% vs. 48%), length of 3-tallest shoots (46 vs. 72 cm), and largest-shoot diameter (4.2 vs. 7.2 mm).

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Levels of Inbreeding in Highbush Blueberry Cultivars1

Cited by 14 publications

References 0 publications

Asymmetric Reciprocal Crossing Behavior of an Andean Blueberry (V. meridionale) × Lingonberry (V. vitis-idaea) Hybrid

Asymmetric Reciprocal Crossing Behavior of an Andean Blueberry (V. meridionale) × Lingonberry (V. vitis-idaea) Hybrid

Toward evidence-based decision support systems to optimize pollination and yields in highbush blueberry

Inbreeding Depression in Rabbiteye Blueberries

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