scholarly journals Correlations between yield and fruit quality characteristics of fresh market tomatoes

2012 ◽  
Vol 30 (4) ◽  
pp. 627-631 ◽  
Author(s):  
Lívia M de Souza ◽  
Paulo César T Melo ◽  
Reginaldo R Luders ◽  
Arlete MT Melo
Keyword(s):  
Plant Traits ◽  
Fruit Weight ◽  
Soluble Solids ◽  
Fresh Market ◽  
Cluster Number ◽  
Environmental Correlations ◽  
Fruit Number ◽  
Phenotypic Correlations ◽  
Primary Yield ◽  
Genotypic And Phenotypic Correlations

Genotypic, phenotypic and environmental correlations were estimated for all possible pairs among eleven characters of tomatoes. Fifteen treatments including five parents and ten hybrids of Instituto Agronômico (IAC) tomato breeding program were evaluated using a randomized complete block experimental design, with tree replications in Itatiba, São Paulo state, Brazil, during 2005/2006. The following traits were evaluated: fruit yield per plant (FP), fruit number per plant (FN), average fruit weight (FW), cluster number per plant (CN), fruit number per cluster (FC), number of locules per fruit (NL), fruit length (FL), fruit width (WI), fruit wall thickness (FT), total soluble solids (SS), and total titratable acidity (TA). The genotypic (rG), phenotypic (rF) and environmental correlations (rA) for two pairs of plant traits were estimated using the Genes© program. High similarity was found among the estimates of genotypic and phenotypic correlations. Positive and high phenotypic and genotypic correlations were observed between FP and the traits FN, FW and FT, and these associations contributed for yield increasing. FW and FT contributed to yield increase and should be considered together as primary yield components in tomato. Positive values of the genotypic and phenotypic correlations revealed that FP influenced FN with high direct effect and significant positive correlation. These traits may be included as the main selection criteria for tomato yield improvement.

scholarly journals Diallel cross among fresh market tomato inbreeding lines

2012 ◽  
Vol 30 (2) ◽  
pp. 246-251 ◽  
Author(s):  
Lívia M de Souza ◽  
Maria Elisa AGZ Paterniani ◽  
Paulo César T de Melo ◽  
Arlete MT de Melo
Keyword(s):  
Combining Ability ◽  
Yield Components ◽  
Block Design ◽  
Diallel Cross ◽  
Fruit Yield ◽  
Soluble Solids ◽  
Width Ratio ◽  
Parental Line ◽  
Fresh Market ◽  
Fruit Number

The general combining ability (GCA), specific combining ability (SCA), and heterosis were studied in a complete diallel cross among fresh market tomato breeding lines with reciprocal excluded. Fifteen genotypes (five parents and ten hybrids) were tested using a randomized complete block design, with three replications, and the experiments were conducted in Itatiba, São Paulo state, Brazil, in 2005/06. The yield components evaluated were fruit yield per plant (FP), fruit number per plant (FN), average fruit weight (FW); cluster number per plant (CN); fruit number per cluster (FC), fruit wall thickness (FT) and number of locules per fruit (NL). Fruit quality components evaluated were total soluble solids (SS); total titratable acidity (TA); SS/TA ratio, fruit length (FL); fruit width (WI); length to width ratio (FL/WI). The data for each trait was first subjected to analysis of variance. Griffing's method 2, model 1 was employed to estimate the general (GCA) and specific (SCA) combining abilities. Parental and hybrid data for each trait were used to estimate of mid-parent heterosis. For plant fruit yield, IAC-2 was the best parental line with the highest GCA followed by IAC-4 and IAC-1 lines. The hybrids IAC-1 x IAC-2, IAC-1 x IAC-4 and IAC-2 x IAC-4 showed the highest effects of SCA. High heterotic responses were found for fruit yield and plant fruit number with values up to 49.72% and 47.19%, respectively. The best hybrids for fruit yield and plant fruit number were IAC-1 x IAC-2, IAC-1 x IAC-4 and IAC-2 x IAC-5, for fruit yield and plant fruit number, the main yield components.

scholarly journals Fruit production and quality of mini-watermelon with different number of stems, in troughs cultivation system and substrate reuse

2021 ◽  
Vol 42 (2) ◽  
pp. 471-486
Author(s):  
Josiéle Garcia Dutra ◽  
◽  
Roberta Marins Nogueira Peil ◽  
Tatiana da Silva Duarte ◽  
Cesar Valmor Rombaldi ◽  
...  
Keyword(s):  
Fruit Quality ◽  
Positive Impact ◽  
Fruit Weight ◽  
Fruit Yield ◽  
Soluble Solids ◽  
Plant Management ◽  
Cultivation System ◽  
Fruit Number ◽  
Yield And Quality ◽  
The One

Substrate-filled pots are growing systems commonly used for vegetable farming. However, few are the studies available relating them to mini-watermelon cultivation. Our study presents a growing system using substrate-filled troughs and leachate recirculation as a low-cost and less environmentally harmful soilless cultivation system for mini-watermelons. For a growing system to be viable and provide high fruit yield and quality, several aspects must be studied, including substrate physical properties and reuse potential in successive crops, besides plant management-related aspects. Therefore, our goal was to evaluate the effects of a trough system and substrate reuse on changes in the properties of raw rice husk and on fruit yield and quality for mini-watermelons at different stem training. To this purpose, two trials were conducted using nutrient solution recirculation systems. In the first, we evaluated the effects of pot and trough systems. In the second, first- and second-use substrates were compared in the trough system. In both trials, one and two-stem training systems were analyzed. The results of the first trial show that the trough system had a greater positive impact on substrate water holding capacity (WHC), which increased from 7.9 to 15.6%, while the pots increased substrate WHC only to 11.2%. However, both systems neither affected fruit yield (8 kg/m² on average) nor fruit quality. The two-stem training promoted higher fruit yields (4.2 kg/plant) and contents of total soluble solids - TSS (11.4 °Brix) but did not affect average fruit weight. Moreover, the one-stem training provided higher fruit number (7.3 fruits/m²) and fruit yield (9.7 kg/m²). In the second trial, the reused substrate showed a higher WHC (12.4%) than the one used for the first time (9.9%). The reused substrate also provided better results in terms of fruit yield and quality (5.9 fruits/m², 5.3 kg/m², and 10.5o Brix). In the second trial, two-stem training also increased average fruit weight, and hence yields per plant. Nevertheless, the stem number did not affect fruit number per plant, fruit yield per square meter, and fruit quality.

scholarly journals PLANT SPACING, COLD TREATMENT, AND FLOWER VIBRATION INFLUENCE ON GREENHOUSE TOMATO PRODUCTION

HortScience ◽  
1994 ◽  
Vol 29 (7) ◽  
pp. 732c-732
Author(s):  
Benjamin G. Mullinix ◽  
Sharad C. Phatak ◽  
Janet Cooper
Keyword(s):  
Monte Carlo ◽  
Unit Area ◽  
Cold Treatment ◽  
Fruit Weight ◽  
Row Spacing ◽  
Plant Spacing ◽  
Fresh Market ◽  
Tomato Production ◽  
Fruit Number ◽  
Tomato Cultivars

Six tomato cultivars [Hotset, Petra, Stella, Big-O, Tropic, & Monte Carlo (fresh market)] were grown in a greenhouse in 1979 from July through November in 3 experiments. Exp. 1: The first two cultivars were used in a 15 cm, 30 cm, or 45 cm in-row spacing with rows spaced 60 cm apart. Cumulative fruit number and weight per unit area declined with increasing in-row spacing. Exp. 2: The first four cultivars were subjected to either cold or no cold treatment during germination before transplanting. No differences were found between the two treatments for mean fruit weight or total fruit number. Exp. 3: The last two cultivars were subjected to both the cold treatment and flower vibration. Cumulative fruit weight was greater for vibrated flowers. Greater mean fruit weight occurred earlier with cold treatment and declined significantly later in season, and was more pronounced in Tropic than Monte Carlo.

scholarly journals Heritability, Genetic, and Phenotypic Correlations of Several Peach Traits

HortScience ◽  
1995 ◽  
Vol 30 (4) ◽  
pp. 763B-763
Author(s):  
Valdomiro A.B. de Souza ◽  
David H. Byrne ◽  
Jeremy F. Taylor
Keyword(s):  
Skin Color ◽  
Fixed Effects ◽  
Prunus Persica ◽  
Mixed Linear Model ◽  
Fruit Weight ◽  
Soluble Solids ◽  
Genetic Progress ◽  
Multiple Trait ◽  
Phenotypic Correlations ◽  
Genetic And Phenotypic Correlations

Heritability estimates are useful to predict genetic progress among offspring when the parents are selected on their performance, but they also provide information about major changes in the amount and nature of genetic variability through generations. Genetic and phenotypic correlations, on the other hand, are useful for better planning of selection programs. In this research, seedlings of 39 families resulting from crosses among 27 peach [Prunus persica (L.) Batsch] cultivars and selections were evaluated for date of full bloom (DFB), date of ripening (DR), fruit period development (FDP), flower density (FD), node density (ND), fruit density (FRD), fruit weight (WT), soluble solids content (SS), apical protuberance (TIP), red skin color (BLUSH), and shape (SH) in 1993 and 1994. The data were analyzed using the mixed linear model. The best linear unbiased prediction (BLUP) was used to estimate fixed effects and predict breeding values (BV). Restricted maximum likelihood (REML) was used to estimate variance components, and a multiple-trait model to estimate genetic and phenotypic covariances between traits. The data indicates high heritability for DFB, DR, FDP, and BLUSH, intermediate heritability for WT, TIP, and SH, and low heritability for FD, ND, FRD, and SS. They also indicate year effect as a major environmental component affecting seedling performance. High correlation estimates were found between some traits, but further analysis is needed to determine their significance.

scholarly journals Weather Affects Seedless Watermelon Yield, But Not Fruit Size or Quality

HortScience ◽  
2004 ◽  
Vol 39 (4) ◽  
pp. 748E-748 ◽  
Author(s):  
Timothy E. Elkner* ◽  
David H. Johnson
Keyword(s):  
Fruit Quality ◽  
Total Yield ◽  
Fruit Size ◽  
Fruit Weight ◽  
Soluble Solids ◽  
Fruit Number ◽  
Seedless Watermelon

Medium-sized triploid watermelons were evaluated in southeast Pennsylvania in 2002 and 2003 to determine the best adapted cultivars for this region. The 2002 season was unusually hot and dry, while 2003 was unusually cool and wet. Yields and fruit quality were compared for the eight cultivars that were grown both seasons to determine the effect of weather on seedless watermelon. Cooler temperatures reduced total fruit number and total yield but not average fruit weight or soluble solids. Researchers evaluating triploid watermelons over several seasons can compare size and °Brix among cultivars, but will need to be cautious when predicting total yields.

scholarly journals Partial Defoliation Can Decrease Average Leaf Size but Has Little Effect on Orange Tree Growth, Fruit Yield and Juice Quality

HortScience ◽  
2005 ◽  
Vol 40 (7) ◽  
pp. 2011-2015 ◽  
Author(s):  
Rongcai Yuan ◽  
Fernando Alferez ◽  
Igor Kostenyuk ◽  
Shila Singh ◽  
James P. Syvertsen ◽  
...  
Keyword(s):  
Leaf Area ◽  
Fruit Size ◽  
Leaf Size ◽  
Fruit Weight ◽  
Fruit Yield ◽  
Soluble Solids ◽  
Juice Quality ◽  
Fruit Number ◽  
Acid Ratio ◽  
Orange Trees

The effects of 2 consecutive years of annual defoliation during the harvest season on fruit size, yield, juice quality, leaf size and number were examined in trees of the midseason cultivar `Hamlin' and the late-season cultivar `Valencia' orange [Citrus sinensis (L.) Osb.]. In `Hamlin', removal of up to 50% of the leaves in late November had no effect on fruit yield, fruit number, fruit size, soluble solids yield, juice °Brix, and °Brix to acid ratio of juice the following year. In `Valencia', removal of 50% of the leaves in late March decreased fruit yield and soluble solids yield but did not affect Brix or the Brix to acid ratio of the juice. Leaf size of new flush was reduced by removal of 50% of the leaves in both cultivars but there was little effect on total canopy size. There were no measured effects of removing 25% of leaves from tree canopies. Thus, canopy growth, fruit yield, fruit quality, and leaf size were not negatively impacted when annual defoliations did not exceed 25% of the total canopy leaf area in `Valencia' and `Hamlin' orange trees for two consecutive years. Overall, fruit weight increased linearly with increasing ratio of leaf area to fruit number, suggesting that fruit enlargement can be limited by leaf area.

scholarly journals Yield and Fruit Quality of Sixteen Fragaria vesca Accessions Grown in Southern Florida

HortScience ◽  
2018 ◽  
Vol 53 (10) ◽  
pp. 1396-1403
Author(s):  
Alan Chambers ◽  
Pamela Moon ◽  
Yuqing Fu ◽  
Juliette Choiseul ◽  
Jinhe Bai ◽  
...  
Keyword(s):  
Fruit Quality ◽  
Field Performance ◽  
Fruit Weight ◽  
Soluble Solids ◽  
Quality Data ◽  
Fragaria Vesca ◽  
Fruit Number ◽  
Significant Difference ◽  
Highly Correlated ◽  
Southern Florida

Fragaria vesca is a diploid strawberry species that produces gourmet, aromatic fruits with only limited commercial production because of its relative obscurity. Most F. vesca research focuses on genetics and fruit aroma, but yield and fruit quality data across diploid accessions are lacking. Sixteen F. vesca accessions were grown in replicated field plots in southern Florida to measure field performance and fruit quality over multiple harvests during a single growing season. Accessions ‘Reine des Vallees’, ‘Baron Solemacher’, ‘Fragolina di Bosco’, and ‘Reugen’ all had significantly higher yield (115–140 g/plot/week) and fruit number (117–139 fruit/plot/week) compared with ‘Bowlenzauber’, ‘Attila’, ‘Ali Baba’, and ‘Pineapple Crush’ (31–57 g/plot/week and 32–60 fruit/plot/week) during peak production. Total average yield ranged from 240 g (‘Pineapple Crush’) to 1194 g (‘Baron Solemacher’) per plot of 10 plants. Fruit number and fruit yield were highly correlated (R2 = 0.96) for all accessions, and there was no significant difference in fruit weight among accessions through the entire season. Total soluble solids ranged from 10.9 to 13.5 °Brix, and fructose, glucose, sucrose, and total sugars ranged from 15.3 to 22.1, 13.5 to 20.0, 0.1 to 2.7, and 29.7 to 42.5 mg/g, respectively, fresh weight. Acidity ranged from 1.00% to 1.18% citric acid and was not consistently significantly different among accessions over multiple harvests. Forty-two aroma compounds were putatively identified over three harvests for each accession and included mostly esters and ketones with a few alcohols, terpenes, and aldehydes. The majority of these compounds were similarly abundant over harvests and among accessions with a few exceptions, including methyl anthranilate. These results are the first in-depth study of yield and fruit quality for a large number of F. vesca accessions that could lead to increased cultivation of this species for local markets.

scholarly journals Bell Pepper (Capsicum annum L.) under Colored Shade Nets: Fruit Yield, Postharvest Transpiration, Color, and Chemical Composition

HortScience ◽  
2020 ◽  
Vol 55 (2) ◽  
pp. 181-187
Author(s):  
Juan Carlos Díaz-Pérez ◽  
Kelly St. John ◽  
Mohammad Yamin Kabir ◽  
J. Alberto Alvarado-Chávez ◽  
Ania M. Cutiño-Jiménez ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Antioxidant Capacity ◽  
Fruit Weight ◽  
Fruit Yield ◽  
Bell Pepper ◽  
Soluble Solids ◽  
Trolox Equivalent Antioxidant Capacity ◽  
Total Phenols ◽  
Marketable Yield ◽  
Fruit Number

Colored shade nets may affect plant growth and fruit yield of horticultural crops. The understanding of how colored shade nets influence plants, however, is far from complete. The objective of this study was to determine the effects of colored shade nets on bell pepper fruit yield, postharvest transpiration, color, chemical composition, and antioxidant capacity. The experiment was conducted in Tifton, GA, during the spring of 2015 and 2016. The experimental design was a randomized complete block with four replications and five colored shade net treatments (black, red, silver, and white nets, and an unshaded control). The nets were placed on the top of wooden rectangular structures (15 m wide × 6 m long × 5 m high), leaving the sides of the structures uncovered. Results showed that in both 2015 and 2016, marketable and total fruit number, yield, and individual fruit weight were reduced under the unshaded treatment. There were inconsistent differences in marketable and total fruit number, yield, and individual fruit weight among colored shade nets. Postharvest fruit transpiration and skin permeance were also reduced in unshaded conditions, and no differences were found among colored shade nets. Fruit color L* and b* values were highest, and a* value was lowest in unshaded conditions. Fruit soluble solids, total phenols, flavonoids, and antioxidant capacity [Cupric Reducing Antioxidant Capacity (CUPRAC) and Trolox Equivalent Antioxidant Capacity (TEAC)] responded differently among colored shade nets in the 2 years. Total phenols, flavonoids, and TEAC, however, were among the highest in unshaded conditions. In conclusion, results of the present study support previous findings that shade nets increase fruit yield and quality in bell pepper compared with fruit produced in unshaded conditions. Nevertheless, there were no consistent differences in fruit total and marketable yield and postharvest fruit transpiration and chemical composition of fruit produced under colored shade nets.

scholarly journals `WHITE ROCK' AND `WHITE COUNTY' FRESH-MARKET PEACHES

HortScience ◽  
2005 ◽  
Vol 40 (3) ◽  
pp. 891e-891
Author(s):  
John R. Clark ◽  
James N. Moore ◽  
Penelope Perkins-Veazie
Keyword(s):  
Prunus Persica ◽  
Fruit Weight ◽  
Soluble Solids ◽  
Average Weight ◽  
University Of Arkansas ◽  
Fresh Market ◽  
Peach Breeding ◽  
Agricultural Experiment ◽  
Bacterial Spot Resistance ◽  
The University

`White Rock' and `White County' fresh market peaches (Prunus persica (L.) Batsch) were released in 2004 by the University of Arkansas Agricultural Experiment Station. These cultivars join `White River' as recent products of the peach breeding program which is based at the University of Arkansas Fruit Substation, Clarksville. Both cultivars are sub- or low-acid types and have white flesh. `White Rock' ripens at on average 25 June, and is very firm at maturity. Average fruit weight was 142 g with 12% soluble solids and light white peach flavor. `White County' ripens on average 14 July. It is large fruited with average weight of 258 g and maintains firmness until full maturity. The fruits are freestone with an excellent white peach flavor. Both cultivars show good bacterial spot resistance although occasional lesions are seen on leaves. These new cultivars offer additional white peach cultivar choices for the mid-South and other areas of similar climate.

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