Clonal selection within the apricot varieties Trevatt and Moorpark

1992 ◽  
Vol 32 (3) ◽  
pp. 413
Author(s):  
RM Cirami ◽  
R Hamilton ◽  
D Hodge
Keyword(s):  
Experimental Error ◽  
Clonal Selection ◽  
Quality Attributes ◽  
Fruit Weight ◽  
Management Systems ◽  
Diverse Population ◽  
Or Management ◽  
Large Experimental Error

Barossa Valley selections of 5 Trevatt and 4 Moorpark apricot varieties were compared over 3 seasons for their characteristics as drying apricots.Although there was a lack of significant differences between Trevatt clones, enough differences occurred in the Moorpark varieties to suggest that many quality attributes, particularly fruit weight, diameter, pH, and drying ratio, can be improved through rigorous selection from a wide and diverse population. The data suggest that different clones may be better suited to particular sites or management systems. A large experimental error was noted and attributed to the variability in seedling rootstock material and the unknown viral status of the scions and rootstocks.

scholarly journals EARLY SPRING APPLICATION OF AMINOETHOXYVINILGLYCINE (AVG) INCREASES FRUIT SET AND YIELD OF ‘ROCHA’ PEARS

2017 ◽  
Vol 39 (4) ◽  
Author(s):  
MATEUS DA SILVEIRA PASA ◽  
BRUNO CARRA ◽  
CARINA PEREIRA DA SILVA ◽  
MARLISE NARA CIOTTA ◽  
ALBERTO FONTANELLA BRIGHENTI ◽  
...  
Keyword(s):  
Fruit Quality ◽  
Fruit Set ◽  
Block Design ◽  
Quality Attributes ◽  
Fruit Weight ◽  
Early Spring ◽  
Full Bloom ◽  
Growing Seasons ◽  
Randomized Block Design ◽  
Return Bloom

ABSTRACT The low fruit set is one of the main factors leading to poor yield of pear orchards in Brazil. Ethylene is associated with abscission of flowers and fruitlets. Then, the application of ethylene synthesis inhibitors, such as AVG, is a potential tool to increase fruit set of pears. The objective of this study was to evaluate the effect of AVG, sprayed at different rates and timings, on fruit set, yield and fruit quality of ‘Rocha’ pear. The study was performed in a commercial orchard located in the municipality of São Joaquim, SC, during the growing seasons of 2014/2015 and 2015/2016. Plant material consisted of ‘Rocha’ pear trees grafted on quince rootstock ‘BA29’. AVG was tested at different rates (60 mg L-1 and 80 mg L-1) and timings [full bloom, one week after full bloom (WAFB), and two WAFB), either alone or in combination. The experiment was arranged in a randomized block design, with at least five single-tree replications. The fruit set, number of fruit per tree, yield, estimated yield, fruit weight, return bloom, and fruit quality attributes were assessed. Fruit set and yield were consistently increased by single applications of AVG at 60 and 80 mg L-1 at both one and two weeks after full bloom, without negatively affecting fruit quality attributes and return bloom.

scholarly journals Peanut Breeding for Leafspot Resistance in Wide and Narrow Intrarow Spacings1

1989 ◽  
Vol 16 (2) ◽  
pp. 119-122
Author(s):  
D. A. Knauft ◽  
D. W. Gorbet
Keyword(s):  
Experimental Error ◽  
Growing Season ◽  
Commercial Production ◽  
Disease Assessment ◽  
Cercospora Arachidicola ◽  
Complex Interactions ◽  
Arachis Hypogaea L ◽  
Disease Rating ◽  
Breeding Selection ◽  
Large Experimental Error

Abstract Sixteen peanut (Arachis hypogaea L.) genotypes were grown without the use of fungicides for two years in two planting arrangements, one an intrarow spacing typically used in commercial production (5 cm between plants) and the other typically used in breeding selection plots (30 cm between plants). At 10-day intervals throughout each growing season the proportion of necrotic leaf area caused by leafspots (Cercospora arachidicola Hori and Cercosporidium personatum (Berk. & Curt.) Deighton), leafspot disease rating (0-9), and stage of vegetative growth (v stage) were assessed. Leafspot disease ratings of genotypes spaced 30-cm apart were significantly correlated with the ratings of genotypes in 5-cm spacing. There was no interaction between genotypes and spacing. Percentage necrotic area in 30-cm and 5-cm plantings was significantly correlated. However, large experimental error and complex interactions among spacings, genotypes, and time of observation lessened the value of this method of disease assessment. While the correlation of v stage in the two spacings was highly significant, differences among genotypes were not consistent.

scholarly journals Determination of initial velocities of enzymic reactions from progress curves

1986 ◽  
Vol 237 (3) ◽  
pp. 821-825 ◽  
Author(s):  
R Dagys ◽  
A Pauliukonis ◽  
D Kazlauskas ◽  
M Mankevicius ◽  
R Simutis
Keyword(s):  
Initial Velocity ◽  
Experimental Error ◽  
Spline Function ◽  
Present Communication ◽  
Time Value ◽  
Substrate Conversion ◽  
Novel Method ◽  
Cubic Spline Function ◽  
Large Experimental Error

The present communication describes a novel method for estimating initial velocities (v) of enzyme-catalysed reactions. It is based on an approximation of experimental data obtained by the cubic spline function. The initial velocity of a reaction is calculated as a derivative of the approximating function at a time value equal to zero. The proposed method is usable on a computer with a FORTRAN IV program. The method can be successfully used in such cases as substantial extents of substrate conversion, the inactivation of an enzyme in the course of a reaction, the existence of large experimental error or when the reaction mechanism is unknown.

scholarly journals Fruit quality attributes of ten Colombian blackberry (Rubus glaucus Benth.) genotypes

2020 ◽  
Vol 38 (1) ◽  
pp. 9-18
Author(s):  
Erika Sánchez-Betancourt ◽  
María Cristina García-Muñoz ◽  
Jorge Argüelles-Cárdenas ◽  
Viviana Franco-Flórez ◽  
Víctor Núñez-Zarantes
Keyword(s):  
Quality Attributes ◽  
Fruit Weight ◽  
Maturity Index ◽  
Soluble Solids ◽  
Soluble Solids Content ◽  
Breeding Programs ◽  
Weight Percentage ◽  
Genetic Source ◽  
Solids Content ◽  
Juice Content

Colombia requires blackberry genotypes with remarkable traitsthat improve the competitiveness of this product in the country.The objective of this work was to evaluate the characteristicsof the quality attributes in fruits of ten Colombian blackberrygenotypes in order to assess their potential in the berry markets but also as a genetic source to be included in breeding programs. The weight of fruits, the equatorial and longitudinal diameters, volume, firmness, color, juice content, flesh content, seed/fruit weight percentage, soluble solids content, acidity, pH and maturity index were evaluated in fruits collected during three different harvest periods in the province of Cundinamarca. Thirty fruits for every genotype and period were harvested and analyzed. These 10 evaluated genotypes showed important differences that allowed separating them into five different groups; however, genotypes 8, 4 and 6 showed the best results regarding size, color, juice content, total soluble solids content, maturity index, firmness and low acidity. These features make them good candidates for incorporating them into breeding programs. Nonetheless, their soluble solids content was considerably lower than values reported for genotypes Prime Ark, Natchez, Ouachita, and Osage that are recognized for theseremarkable traits.

scholarly journals Texture and Other Quality Attributes in Olives and Leaf Characteristics after Preharvest Calcium Chloride Sprays

HortScience ◽  
2008 ◽  
Vol 43 (6) ◽  
pp. 1852-1856 ◽  
Author(s):  
Eleni Tsantili ◽  
Miltiadis V. Christopoulos ◽  
Constantinos A. Pontikis ◽  
Pantousis Kaltsikes ◽  
Chariklia Kallianou ◽  
...  
Keyword(s):  
Calcium Chloride ◽  
Chlorophyll Concentration ◽  
Fruit Size ◽  
Quality Attributes ◽  
Fruit Production ◽  
Fruit Weight ◽  
Photosynthesis Rate ◽  
Positive Effects ◽  
Positive Linear Correlation ◽  
Negative Effect

The effect of three preharvest sprays with water or 58.5 mm calcium chloride (CaCl2) on texture and other quality attributes was investigated in ‘Konservolia’ olives harvested at the black-ripe stage and measured after 1 and 15 days of storage in air at 10 °C with 85% relative humidity. Effects on fruit calcium (Ca) and magnesium (Mg) concentrations during the period of spray applications were also studied. Concentrations of Ca, Mg, and chlorophyll and photosynthesis rate in leaves were measured on the day of final fruit harvest. No foliar or fruit toxicity was observed. In leaves, Ca sprays increased Mg but did not affect Ca and chlorophyll concentration and photosynthesis rate. In fruits, Ca sprays prevented the gradual decrease in Ca concentration that occurred in untreated fruits and maintained Mg at constant levels during ripening on the tree but did not affect fruit size and oil content as measured 1 day after storage. Ca-treated fruits were firmer with lower soluble pectin (SP) concentration and higher calcium pectate (CaP) than controls in both storage days, whereas the protopectin levels were similar in all fruits. Results showed positive linear correlation between Ca concentration and either firmness or CaP, whereas that between Ca and SP was negative as found in fruits stored for 1 day. Fruit production rates of carbon dioxide and ethylene, L* and chroma (C*) of peel, and hue angle (h°) of flesh were unaffected either by Ca treatment or storage time. Ca treatment did not affect fruit weight loss, the decreases in peel h° and flesh L*, but increased flesh C* during storage. The results indicate positive effects of preharvest calcium sprays on olive firmness without any negative effect on fruits or leaves.

scholarly journals Characterization of mango (Mangifera indica L.) genotypes based on physio-chemical quality attributes

2017 ◽  
Vol 9 (4) ◽  
pp. 2199-2204
Author(s):  
Lokesh Bora ◽  
A. K. Singh ◽  
C. P. Singh
Keyword(s):  
Mangifera Indica ◽  
Quality Attributes ◽  
Fruit Weight ◽  
Soluble Solids ◽  
Chemical Quality ◽  
Fruit Crops ◽  
Total Soluble Solids ◽  
Climatic Regions

Evaluation of fruit crops has been successfully utilized for studying the performance of varieties under different agro climatic regions time to time. In the present study cultivars were characterized on the basis of their physico-biochemical attributes. “Mallika” and “Neelgoa” were found superior in terms of fruit weight (321.87 g), size (12.55 cm, 8.13 cm), pulp weight (257.91 g) and pulp stone ratio (7.71) respectively. “Mallika” excelled in terms of sugar (20.82), while “Amrapali” in carotenoids (8.38 mg/100 g). Among them, Mallika (22.41◦B) possessed the high-est amount of total soluble solids while lowest amount in Langra (16.90 ◦B) whereas maximum titrable. The study shows the potential of Amrapali in terms of its quality, being late can meet the demand for later period when no other cultivar is available.

scholarly journals Effects of Preharvest Calcium Foliar Sprays on Several Fruit Quality Attributes and Nutritional Status of the Kiwifruit Cultivar Tsechelidis

HortScience ◽  
2010 ◽  
Vol 45 (6) ◽  
pp. 984-987 ◽  
Author(s):  
Nikolaos Koutinas ◽  
Thomas Sotiropoulos ◽  
Antonios Petridis ◽  
Dimitrios Almaliotis ◽  
Emmanuil Deligeorgis ◽  
...  
Keyword(s):  
Nutritional Status ◽  
Fruit Quality ◽  
Foliar Application ◽  
Quality Attributes ◽  
Fruit Weight ◽  
First Year ◽  
Antioxidant Power ◽  
Flesh Firmness ◽  
Foliar Sprays ◽  
Second Year

The effect of various commercial calcium (Ca) -containing products applied as preharvest foliar sprays on several fruit quality attributes and nutritional status of the kiwifruit cultivar Tsechelidis for a 2-year period is reported. Foliar application of all Ca products plus boron did not affect mean fruit weight compared with the control. During the first year, the highest flesh firmness was measured after application of the Ca-containing products Acid CaLMg and Calfruit plus Qualyfruit. During the second year, the highest flesh firmness was measured after application of the product Acid CaLMg. The highest ascorbic acid content and total antioxidant power were recorded after application of the product Chelan CaP. Foliar application of Power-Ca resulted in an increase of Ca concentration of leaves compared with the control for the first year. During the second year, all Ca-containing products increased Ca concentration of leaves compared with the control. Foliar application of Calfruit plus Qualyfruit, Chelan CaP, Power Ca, and Acid CaLMg resulted in an increase of Ca concentration of fruits compared with the control. The efficacy of the foliar sprays on some of the tested parameters varied from year to year indicating the influence of other parameters on vine nutrition.

Forage Master: A decision tool for selecting and managing forages for New Zealand sheep and beef farms

2004 ◽  
pp. 207-213
Author(s):  
J. Finlayson ◽  
I.M. Knowles ◽  
T.J. Fraser
Keyword(s):  
Decision Making ◽  
New Zealand ◽  
Management Systems ◽  
Specific Information ◽  
Decision Tool ◽  
Electre Iii ◽  
Or Management ◽  
Selection Decision ◽  
Farmer Groups ◽  
On Farm

This paper describes the development of a forage selection decision tool. The project was carried out in conjunction with Meat and Wool New Zealand and farmer mentor groups in Manawatu, Canterbury and Southland. The model uses a multi-criteria technique called Electre III which helps rank the characteristics of forages relative to environmental conditions and farmers objectives. The approach allows farmers to rank and compare suitable species and cultivars. The decision tool provides advice on appropriate seed mixes and specific information on establishment and management. In addition the model was structured to allow farmers to discover limitations to their environment or management systems through a process called 'back-chaining'. An example of this is where a farmer queries the model to discover what conditions prevented a forage from being selected. Demonstrations of the Forage Master to a range of farmer groups nationwide has provided excellent feedback on the value of the decision tool, firstly for aiding on-farm decision making and secondly, benefits associated with the information provided in the help links. Keywords: computer model, cultivars, forage, forage selection, multiple criteria, pasture species

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