Early Defoliation Impact on Fruitset, Yield, Fruit Quality, and Cold Hardiness in ‘Chambourcin’ Grapevines

A diploid blueberry mapping population, used previously to map quantitative trait loci (QTL) for chilling requirement and cold hardiness, was evaluated for several plant development and fruit quality traits. Specifically, the population was phenotyped in a greenhouse for timing of various stages of flower bud, leaf bud and fruit development and for fruit quality traits including weight, diameter, color, scar, firmness, flavor and soluble solids. Phenotypic data was analyzed statistically by analysis of variance, correlation tests, to examine associations of traits, and heritability. Results indicated that the traits were segregating and most were distributed normally in the population. Many of the development traits were correlated, and timing of shoot expansion, early bloom and full bloom was also correlated with the previously evaluated trait of chilling requirement. Some correlations were found among the fruit quality traits as well. For example, weight was highly correlated with diameter, and subjectively measured firmness was moderately correlated with one of the objectively measured firmness traits. In addition, most of the traits showed significant variation across genotypes and across years, and most had moderate to high heritability. Therefore, we conclude that the diploid population should be useful for identifying QTL for many of these traits.

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Effects of Irrigation on Wine Grape Growth and Fruit Quality

HortTechnology ◽

10.21273/horttech.10.1.162 ◽

2000 ◽

Vol 10 (1) ◽

pp. 162-168 ◽

Cited By ~ 8

Author(s):

Richard Allen Hamman ◽

Imed Eddine Dami

Keyword(s):

Soil Moisture ◽

Fruit Quality ◽

Cold Hardiness ◽

Sugar Content ◽

Soluble Sugar ◽

Irrigation Management ◽

Management Strategies ◽

Field Studies ◽

Fruit Weight ◽

Wine Quality

Field studies were conducted to determine the effect of three drip irrigation regimes on grapevine growth, juice and wine quality, soil moisture, cold hardiness of bud and cane tissues and soluble sugar content of cortical cane tissues of Vitis vinifera, Linnaeus `Cabernet Sauvignon'. This study was developed to help provide some irrigation management strategies that would improve fruit quality and reduce excessive vigor. Irrigation treatments of 192, 96, and 48 L (51, 25, and 13 gal) per vine per week were initiated at bud break until veraison (initiation of berry color) and then reduced by 25% through harvest. Significant differences of fruit weight per vine, crop load, soil moisture, average berry and cluster weight, shoot length and pruning weight per meter of canopy row were observed among treatments. Juice and wine compositions and wine color were also significantly different; however, cold hardiness and soluble sugar contents did not differ between treatments.

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Breeding for Cold Hardiness: Searching for Genes to Improve Fruit Quality in Cold-hardy Peach Germplasm

HortScience ◽

10.21273/hortsci.26.5.522 ◽

1991 ◽

Vol 26 (5) ◽

pp. 522-526 ◽

Cited By ~ 10

Author(s):

Ann Callahan ◽

Ralph Scorza ◽

Peter Morgens ◽

Seth Mante ◽

John Cordts ◽

...

Keyword(s):

Fruit Quality ◽

Cold Hardiness ◽

Cold Hardy

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094 CROPLOAD EFFECT ON BUD COLD HARDINESS OF Vitis labruscana L. cv. CONCORD

HortScience ◽

10.21273/hortsci.29.5.441e ◽

1994 ◽

Vol 29 (5) ◽

pp. 441e-441

Author(s):

Robert L. Wample ◽

Lynn Mills ◽

Anna Wichers

Keyword(s):

Low Temperature ◽

Fruit Quality ◽

Cold Hardiness ◽

Average Yield ◽

Visual Examination ◽

Term Study ◽

Long Term Study ◽

Vitis Labruscana

An increase in mechanical pruning of Concord grapevines in Washington has led to a marked increase in yield. In 1993 the average yield for the 20,000 plus acres was slightly greater than 12 ton/acre. As part of a long term study, initiated in 1987, to evaluate the effects of mechanical pruning on Concord yield and fruit quality, we have also followed bud cold hardiness and winter injury over several years. Cold hardiness was monitored using low temperature exotherm analysis of excised buds. Winter injury was evaluated by visual examination of bud and cane tissues collected from vines with different croploads. In 1990 the average yield for mechanically pruned vines was 13T/ac and for balance pruned vines about 8T/ac. Winter injury during December 1990 showed significantly less injury to mechanically pruned vines whether primary, secondary or tertiary buds were examined. During the winter of 1991-92 and 1993-94 bud cold hardiness of individual vines showed no relationship to cropload per vine.

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Yield, Tree Size, and Fruit Quality of Mature ‘Owari’ and ‘Brown Select’ Satsuma on Poncirus trifoliata ‘Rubidoux’ and ‘Flying Dragon’ Rootstocks in North Florida

HortScience ◽

10.21273/hortsci.50.11.1650 ◽

2015 ◽

Vol 50 (11) ◽

pp. 1650-1653 ◽

Cited By ~ 2

Author(s):

Peter C. Andersen ◽

Brent V. Brodbeck

Keyword(s):

Fruit Quality ◽

Cold Hardiness ◽

Fruit Weight ◽

Poncirus Trifoliata ◽

Tree Size ◽

Soluble Solids ◽

Quality Data ◽

Volume Yield ◽

Canopy Area

There is increasing interest in the culture of satsuma citrus in the states bordering the northern Gulf of Mexico. Yield, tree size, and fruit quality of mature ‘Owari’ and ‘Brown Select’ satsuma (Citrus unshiu Marcovitch) on Poncirus trifoliata (L.) Raf. (‘Rubidoux’ and ‘Flying Dragon’) were evaluated in north Florida. Canopy area and volume, yield, and fruit quality data were analyzed as a 2 × 2 factorial design with scion and rootstock as the main effects. There were no scion × rootstock interactions. Overall average yield per tree was 16, 88, 91, 143, and 101 kg in 2010, 2011, 2012, 2013, and 2014, respectively. Yield was influenced by scion (higher for ‘Brown Select’) in three of five years, and by rootstock every year (higher for ‘Rubidoux’). Yield per tree was ≈2-fold greater for trees on ‘Rubidoux’ compared with ‘Flying Dragon’; the highest yield was recorded for ‘Brown Select’ on ‘Rubidoux’. Yield per m2 canopy area was often similar since canopy area was often ≈2-fold greater for trees on ‘Rubidoux’. For three of the five years, fruit weight was greater for ‘Brown Select’ (average = 157 g) than ‘Owari’ (average = 146 g), with no rootstock effect. Soluble solids of juice averaged 10.0 °Brix and were higher for trees on ‘Flying Dragon’ than on ‘Rubidoux’ in three of five years. Juice pH averaged 3.67 and was unaffected by scion or rootstock. Trees were not subjected to freeze protection and were not damaged by minimum temperatures as low as −9.4 °C, except for 2014/15. A rating of defoliation after a freeze on 19 Nov. 2014 (−5.6 °C) indicated that cold hardiness varied by scion (greater for ‘Brown Select’) and rootstock (greater for ‘Rubidoux’). Differences in cold hardiness did not persist when assessed later in the winter. Successful satsumas production can be achieved in north Florida in the absence of a severe freeze event.

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Evaluation of Southern Highbush Blueberry Cultivars for Production in Southwestern Arkansas

HortTechnology ◽

10.21273/horttech.12.2.271 ◽

2002 ◽

Vol 12 (2) ◽

pp. 271-274 ◽

Cited By ~ 3

Author(s):

P. Manjula Carter ◽

John R. Clark ◽

R. Keith Striegler

Keyword(s):

Fruit Quality ◽

Cold Hardiness ◽

Vaccinium Corymbosum ◽

Highbush Blueberry ◽

Chilling Requirement ◽

Production Potential ◽

Vaccinium Ashei ◽

Early Ripening ◽

Quality And Reliability ◽

Southern Highbush

Southern highbush blueberry, a hybrid of northern highbush (Vaccinium corymbosum) and southern-adapted Vaccinium species, has the potential to meet the need for an early-ripening blueberry in the southern U.S. southern highbush cultivars can ripen up to one month earlier than the earliest rabbiteye (Vaccinium ashei) cultivars currently grown in the southern U.S. However, chilling requirement and cold-hardiness are cultivar-dependent for southern highbush and cultivar testing has been necessary to determine the cultivars best adapted to specific hardiness zones. In a 4-year study at Hope, Ark. (hardiness zone 7b), several southern highbush cultivars were evaluated for productivity, fruit quality and reliability of cropping. Yields were based on 1089 plants/acre (2690 plants/ha) for southern highbush cultivars and 605 plants/acre (1494 plants/ha) for rabbiteye cultivars. `Ozarkblue' and `Legacy' showed the most adaptability at this location, yielding on average 11,013 lb/acre (12,309 kg·ha-1) and 10,328 lb/acre (11,543 kg·ha-1) respectively, compared to 4882 lb/acre (5456 kg·ha-1) for `Premier' (rabbiteye) over 4 years. `Ozarkblue' and `Legacy' also rated well for plant vigor and fruit quality. We would recommend `Ozarkblue' and `Legacy' for commercial planting in southwest Arkansas and believe these cultivars have production potential for other areas of the southern U.S. that have similar hardiness zones and soil type to southwest Arkansas.

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