scholarly journals The Genetic Composition and Tetrasomic Inbreeding Coefficients of Highbush Blueberry Cultivars

HortScience ◽  
1994 ◽  
Vol 29 (11) ◽  
pp. 1342-1345 ◽  
Author(s):  
Mark K. Ehlenfeldt
Keyword(s):  
United States ◽  
Vaccinium Corymbosum ◽  
Southern United States ◽  
Highbush Blueberry ◽  
Genetic Composition ◽  
Tetrasomic Inheritance ◽  
Inbreeding Coefficients ◽  
Inheritance Model ◽  
Recent Trends ◽  
Per Se

Inbreeding coefficients were calculated for highbush blueberry (Vaccinium corymbosum L.) cultivars based on a tetrasomic inheritance model. This model yielded lower inbreeding coefficients than previous calculations based on a disomic tetraploid inheritance model. Recent trends in breeding have resulted in significant use of V. darrowi Camp as a source of low-chilling germplasm for use in the southern United States. There is also a trend toward increased inbreeding in several crosses from which recently released cultivars have been derived. Increased inbreeding coefficients do not represent a detrimental situation in blueberry per se.

Reproductive incompatibility barriers in crosses between Vaccinium corymbosum and V. elliottii

1985 ◽  
Vol 63 (11) ◽  
pp. 1987-1996 ◽  
Author(s):  
C. E. Munoz ◽  
P. M. Lyrene
Keyword(s):  
United States ◽  
Cell Division ◽  
Pollen Tube ◽  
Resting State ◽  
Southeastern United States ◽  
Female Parent ◽  
Vaccinium Corymbosum ◽  
Highbush Blueberry ◽  
Embryo Abortion ◽  
Reproductive Incompatibility

A study was made of barriers to hybridization between tetraploid V. corymbosum L., the cultivated highbush blueberry, and V. elliottii Chapm., a wild diploid blueberry which may be useful in breeding cultivars adapted to the southeastern United States. Both prefertilization and postfertilization barriers were detected. Prefertilization barriers were mainly observed when V. elliottii was the male parent and were manifested as an arrest of pollen tube growth at the base of the style. In cases where fertilization did take place, regardless of which species was used as the female, a strong postfertilization barrier usually prevented development of hybrid zygotes. Zygotes remained in a resting state after fertilization and usually aborted before dividing. Meanwhile, the endosperm underwent four to six cycles of cell division before it started to degenerate. A causal relationship between embryo abortion and endosperm malfunction was not clearly established. Endosperm malfunction and embryo abortion were delayed when V. corymbosum was the female parent.

scholarly journals Botryosphaeria Stem Blight on Southern Highbush Blueberry in Florida

EDIS ◽  
2019 ◽  
Vol 2019 (2) ◽  
Author(s):  
Norma C. Flor ◽  
Douglas A. Phillips ◽  
Philip F. Harmon
Keyword(s):  
United States ◽  
Plant Pathology ◽  
Vascular Disease ◽  
Abiotic Stresses ◽  
Southern United States ◽  
Highbush Blueberry ◽  
Stem Blight ◽  
Pathology Department ◽  
Advanced Stages ◽  
Southern Highbush

Botryosphaeria stem blight is the most common and damaging fungal vascular disease on southern highbush blueberry in the southern United States, causing stem and cane dieback and reductions in yield. Advanced stages of this disease may cause premature plant death, which results in significant replanting costs for growers. Biotic or abiotic stresses from a variety of sources can make plants more susceptible to infection by stem blight pathogens. This new 5-page publication is intended for Florida blueberry growers to use as a guide in the identification and management of Botryosphaeria stem blight on southern highbush blueberry. Written by Norma C. Flor, Douglas A. Phillips, and Philip F. Harmon and published by the UF/IFAS Plant Pathology Department. http://edis.ifas.ufl.edu/pp347

scholarly journals Foliar Elemental Analysis of Southern Highbush, Rabbiteye, and Highbush Blueberries in the Southern United States

1994 ◽  
Vol 4 (4) ◽  
pp. 351-355 ◽  
Author(s):  
John R. Clark ◽  
David Creech ◽  
Max E. Austin ◽  
M.E. “Butch” Ferree ◽  
Paul Lyrene ◽  
...  
Keyword(s):  
United States ◽  
Elemental Analysis ◽  
Vaccinium Corymbosum ◽  
Southern United States ◽  
Southern States ◽  
Highbush Blueberries ◽  
Southern Highbush ◽  
Species Specific ◽  
Nutritional Monitoring

Highbush (Vaccinium corymbosum L.), rabbiteye (V. ashei Reade), and southern highbush (Vaccinium spp.) blueberries grown at seven locations in six southern states were sampled in 1988 and 1989 to determine foliar elemental levels among blueberry cultivars and types. Across locations, elemental levels of N, P, K, Ca, Mg, S, Fe, Mn, Zn, Cu, and Al were similar for highbush and southern highbush types. Rabbiteye elemental levels were different from highbush and southern highbush for N, P, K, Ca, S, Mn, Cu, and Al. Rabbiteye blueberries appear to have different foliar levels, and may require species-specific standards for nutritional monitoring of plantings.

scholarly journals First Report of Vaccinium arboreum Hybrids with Cultivated Highbush Blueberry

HortScience ◽  
2011 ◽  
Vol 46 (4) ◽  
pp. 563-566 ◽  
Author(s):  
Paul M. Lyrene
Keyword(s):  
United States ◽  
Southeastern United States ◽  
Morphological Characteristics ◽  
Growing Season ◽  
Vaccinium Corymbosum ◽  
Highbush Blueberry ◽  
Male Sterile ◽  
Microscopic Appearance ◽  
Drought Tolerant ◽  
Pollen Shed

Over several years, we obtained no hybrids after pollinating thousands of flowers of cultivated tetraploid highbush blueberry (Vaccinium corymbosum L. hybrids, section Cyanococcus) with pollen from diploid V. arboreum Marshall (section Batodendron, sparkleberry), a drought-tolerant blueberry relative native in the southeastern United States. In an effort to produce tetraploid V. arboreum that could be crossed with highbush blueberry, more than 30,000 seeds were soaked in aqueous colchicine (0.1% to 0.2%) for 24 h or more. The seeds were germinated, and putative tetraploid plants (selected based on morphological characteristics) were grown long enough to obtain pollen for microscopic examination. Twelve selected seedlings that produced unusually large pollen tetrads were used as pollen parents in crosses with more than 40 different tetraploid highbush cultivars and advanced selections. Eighty-six crosses, in which a total of 17,968 flowers were pollinated, gave 1,569 plants that were verified as hybrids after one growing season in the field. Hybrids varied from very weak to quite vigorous, some equaling highbush cultivars in vigor. A few vigorous hybrids were male-sterile, but most had at least some pollen fertility. Of the most vigorous F1 hybrids, 12 of the most fertile, based on the amount of pollen shed and on the microscopic appearance of the pollen, were backcrossed to highbush cultivars, and 3919 backcross seedlings were obtained. These varied widely in vigor but averaged higher in vigor than their F1 interspecific hybrid parents.

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