scholarly journals Analysis of Re-Heterosis for Yield and Fruit Quality in Restructured Hybrids, Generated from Crossings among Tomato Recombinant Lines

Agronomy ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 822
Author(s):  
Ilias D. Avdikos ◽  
Georgia-Maria Nteve ◽  
Athanasia Apostolopoulou ◽  
Rafail Tagiakas ◽  
Ioannis Mylonas ◽  
...  
Keyword(s):  
Fruit Quality ◽  
Recombinant Inbred Lines ◽  
Block Design ◽  
Farming System ◽  
Quality Characteristics ◽  
F1 Hybrids ◽  
Dominance Model ◽  
Low Input ◽  
Organic Cultivation ◽  
Pure Lines

Randomized complete block design was used, with three replications. Heterosis for yield and fruit quality characteristics was studied, and expressed as Relative heterosis, heterobeltiosis and Standard heterosis. It would be expected, according to the dominance model, that the heterosis recorded after crossing the recombinant lines, having only a small portion of recessive deleterious alleles, would be minimal. The results showed that the elite recombinant inbred lines became the parents of elite restructured hybrids, with increased levels of re-heterosis for all characters measured. This may prove that dominance is not the only case in explaining heterosis in tomato for yield components and fruit quality characteristics. Several recombinant lines, and most of the new reconstructed F1 hybrids, showed excellent productivity under a low input farming system. The evaluation and selection of the different types of cultivars (recombinant pure lines or reconstructed hybrids) under low input conditions could point towards the most suitable/ideal genotype for organic cultivation.

scholarly journals Comparative Evaluation of Tomato Hybrids and Inbred Lines for Fruit Quality Traits

Agronomy ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 609
Author(s):  
Ilias D. Avdikos ◽  
Rafail Tagiakas ◽  
Pavlos Tsouvaltzis ◽  
Ioannis Mylonas ◽  
Ioannis N. Xynias ◽  
...  
Keyword(s):  
Fruit Quality ◽  
Gene Action ◽  
Block Design ◽  
Quality Characteristics ◽  
Hybrid Vigor ◽  
F1 Hybrids ◽  
Individual Plant ◽  
Additive Gene Action ◽  
Additive Gene ◽  
Tomato Cultivars

Tomato is one of the most consumed fruit vegetables globally and is a high dietary source of minerals, fiber, carotenoids, and vitamin C. The tomato is also well known for its nutraceutical chemical content which strengthens human immune systems and is protective against infectious and degenerative diseases. For this reason, there has been recent emphasis on breeding new tomato cultivars with nutraceutical value. Most of the modern tomato cultivars are F1 hybrids, and many of the characteristics associated with fruit quality have additive gene action; so, in theory, inbred vigor could reach hybrid vigor. A sum of 20 recombinant lines was released from the commercial single-cross hybrids Iron, Sahara, Formula, and Elpida, through a breeding process. Those recombinant lines were evaluated during spring–summer 2015 under organic farming conditions in a randomized complete block design (RCBD) experimental design with three replications. A sum of eleven qualitative characteristics of the fruit was recorded on an individual plant basis. Results from this study indicated that the simultaneous selection of individual tomato plants, both in terms of their high yield and desired fruit quality characteristics, can lead to highly productive recombinant lines with integrated quality characteristics. So, inbred vigor can reach and even surpass hybrid vigor. The response to selection for all characteristics evaluated shows additive gene action of all characteristics measured. These recombinant lines can fulfill this role as alternatives to hybrid cultivars and those that possess high nutritional values to function as functional-protective food.

scholarly journals Morphological, Leaf Nutrient, and Fruit Quality Characteristics of Diverse Tomato Cultivars under Organic Low-Input Management

2021 ◽  
Vol 13 (21) ◽  
pp. 12326
Author(s):  
Leangsrun Chea ◽  
Cut Erika ◽  
Marcel Naumann ◽  
Inga Smit ◽  
Bernd Horneburg ◽  
...  
Keyword(s):  
Fruit Quality ◽  
Plant Morphology ◽  
Quality Characteristics ◽  
Fruit Yield ◽  
Soluble Solids ◽  
Mineral Concentration ◽  
Tomato Production ◽  
Low Input ◽  
Yield And Quality ◽  
Tomato Cultivars

Increasing fruit yield and quality of tomatoes under organic low-input conditions remains a challenge for producers and breeders. Therefore, it is necessary to identify superior tomato cultivars that are suitable for production and use as parents in breeding programmes. In the present study, the variations in plant morphology and fruit quality characteristics of tomato cultivars were assessed to reveal the traits associated with improved yield and fruit quality. Sixty diverse tomato cultivars were screened in 2015, and in 2016, a subset of 20 cultivars was selected for further evaluation under organic low-input conditions. The results showed high variability among cultivars in all 28 traits that were observed. Salad cultivars had lower plant growth and fruit quality (minerals, dry matter, total soluble solids, and total phenolics) by 10–70%, but they displayed 10–60% higher fruit yield and leaf minerals than cocktail cultivars. Salad tomato cultivars with superior yield and harvest index were mainly derived from breeding for intensive indoor production. Cocktail cultivars with superior yield were mainly derived from organic and outdoor breeding programs. There was a trade-off between fruit yield and quality, indicating a challenge for simultaneous improvement of yield and quality. The importance of Mg was highlighted because of its contribution to the fruit mineral concentration and fruit quality. Cultivars superior in one trait or trait combination under organic low-input conditions were identified to be used by producers and breeders as superior cultivars to meet their production targets and breeding objectives. The importance of Mg provides a novel path for further research on improving soil-available Mg in organic tomato production to enhance fruit mineral concentration and fruit quality in general.

scholarly journals Yield response of diallelic crossed maize (Zea mays L.) genotypes to varying nitrogen regimes in Nigeria

2012 ◽  
Vol 19 ◽  
pp. 43-52
Author(s):  
OB Bello ◽  
MS Afolabi ◽  
SA Ige ◽  
SY Abdulmaliq ◽  
MA Azeez ◽  
...  
Keyword(s):  
Grain Yield ◽  
Block Design ◽  
Farming System ◽  
N Fertilizer ◽  
F1 Hybrids ◽  
Yield Response ◽  
Gene Pools ◽  
Growing Seasons ◽  
Maize Cultivars ◽  
Maize Varieties

Context: Development of early maturing maize cultivars that remain productive under low N fertilizer farming system, consistent with the farmers’ technologies is a prerequisite to improving adoption of new varieties without increasing production cost. Objective: To assess the performance of ten early open pollination maize varieties (OPVs) and their F1 hybrids for grain yield and nitrogen use efficiency (NUE), and also identify productive cultivars under low N fertilizer regimes. Materials and Methods: The trials were set up in a split plot arrangement with three N fertilizer levels (0, 45 and 90 kg N ha-1) as main plot and the genotypes as sub-plot. Each plot within N level was four-row, laid out in a randomized complete block design of four replications. Ten OPVs were crossed in a half diallel to generate 45 F1 hybrids during 2004 and 2005 growing seasons. Planting were carried out on 20th July, 2005 and 2nd July, 2006. Agronomic characters studied were grain yield, maize establishment count, days to 50% tasselling and silking as well as plant and ear heights. Results: The year 2005 growing season was better for all observed characters amongst all the genotypes than the year 2006. Although, expressions of these traits in the hybrids were relatively higher than the OPVs including the grain yield. The total increase in grain yield observed was 1.72 t ha-1 and 1.95 t ha-1 for OPVs and hybrids respectively on application of 90 kg ha-1 over no N-application. However, NUE was optimum at 45 kg N ha-1 in both groups. Grain yield and NUE correlated positively with growth characters measured except for days to 50% silking. Higher genetic gains were recorded for plant and ear heights. Conclusion: Two drought tolerant varieties (Acr 90 Pool 16-Dt and Tze Comp3 Dt) that combined well with specific cultivars for grain yield and NUE probably have gene pools for low N-tolerance. DOI: http://dx.doi.org/10.3329/jbs.v19i0.13000 J. bio-sci. 19 43-52, 2011

scholarly journals Fruit quality of 'Tahiti' lime (Citrus latifolia Tanak) grafted on twelve different rootstocks

2009 ◽  
Vol 31 (2) ◽  
pp. 454-460 ◽  
Author(s):  
Eduardo Sanches Stuchi ◽  
Antonio Baldo Geraldo Martins ◽  
Rodrigo Rodas Lemo ◽  
Tatiana Cantuarias-Avilés
Keyword(s):  
Fruit Quality ◽  
Block Design ◽  
Good Alternative ◽  
Quality Characteristics ◽  
Poncirus Trifoliata ◽  
Rangpur Lime ◽  
Experimental Station ◽  
Randomized Block Design ◽  
Citrus Latifolia

In the present work, the effect of twelve rootstocks on fruit quality of the nucellar clone IAC-5 of 'Tahiti' lime, (Citrus latifolia Tanaka) and the influence of fruit position on tree in fruit quality was evaluated in the Citrus Experimental Station of Bebedouro (EECB), located in the Bebedouro county, state of São Paulo, Brazil. A 8.0 x 5.0m planting frame was utilized. The evaluated rootstocks were: 'Carrizo' citrange (C. sinensis (L.) Osbeck x Poncirus trifoliata (L.) Raf.); the hybrids 'Rangpur' lime x 'Swingle' citrumello (C. limonia Osbeck x P. trifoliata Raf) and 'Changsha' x 'English Small'(C. sunki Hort. ex Tan. x P. trifoliata Raf.); the mandarins 'Sun Chu Sha Kat' (C. reticulata Blanco) and 'Sunki' (C. sunki Hort. ex Tanaka); the 'Rangpur' limes 'Cravo Limeira' and ' Cravo FCAV' (C. limonia Osbeck); the 'Swingle' citrumello (P. trifoliata Raf. x C. paradisi Macf.); the 'Orlando' tangelo (C. reticulata Blanco x C. paradisi Macf.) and the trifoliates cvs. 'Rubidoux', 'FCAV' and 'Flying Dragon' (P. trifoliata Raf.). The experiment was arranged in a randomized block design, with twelve treatments, six replicates and one plant per plot. The rootstocks induced differences in fruit quality; however, all the evaluated quality characteristics were within the values considered as normal and acceptable for the variety, constituting good alternative rootstocks for the 'Rangpur' lime. Additionally, the fruit position in the plant (northeastern or southwestern) had a significant influence on the external fruit color regardless of the rootstock.

scholarly journals Flowering and fruit quality characteristics in some seeded and seedless pummelo cultivars

2020 ◽  
Vol 22 (1) ◽  
Author(s):  
Ummu Kalsum ◽  
Slamet Susanto ◽  
Ahmad Junaedi ◽  
Nurul Khumaida ◽  
Heni Purnamawati
Keyword(s):  
Fruit Quality ◽  
Block Design ◽  
Quality Characteristics ◽  
Soluble Solids ◽  
Flower Number ◽  
Randomized Block Design ◽  
Irregular Pattern ◽  
Significant Difference ◽  
The Difference

Abstract. Kalsum U, Susanto S, Junaedi A, Khumaida N, Purnawawati H. 2021. Flowering and fruit quality characteristics in some seeded and seedless pummelo cultivars. Biodiversitas 22: 379-386. Most of the pummelo cultivars with seeds, while other parts of it are seedless. Each cultivar is thought to have his characteristics. This study aimed to obtain more detailed information related to the difference in flowering characteristics and fruit quality of seeded and seedless pummelo cultivars. This experiment used a randomized block design with four treatments, i.e., seeded pummelo (Adas Duku and Bali Merah 1) and seedless pummelo (Bali Merah 2 and Jawa 1). The results showed an irregular pattern in the flowering and harvesting period in both the seeded and seedless groups. Adas Duku blooms twice whereas Bali Merah 1 and the two cultivars of the seedless group bloom only once a year. The highest total flower number from the four cultivars was Adas Duku and followed by Jawa 1>Bali Merah 1>Bali Merah 2. Seeded pummelo was not significant difference with seedless pummelo on several variables, except the total titrable acidity (TTA) content (seeded group > seedless group). Adas Duku became the best cultivar compared to the other three cultivars in several characteristics, such as the lowest peel thickness, the highest in the edible portion, the total soluble solids (TSS) and TTA of flesh fruit.

scholarly journals Preliminary Performance of Six Scab-resistant Apple Cultivars in Northwestern New Jersey

HortScience ◽  
1995 ◽  
Vol 30 (4) ◽  
pp. 843C-843
Author(s):  
Winfred P. Cowgill ◽  
M.H. Maletta ◽  
W.H. Tietjen ◽  
J. Compton ◽  
D. Polk ◽  
...  
Keyword(s):  
Fruit Quality ◽  
Block Design ◽  
Tree Height ◽  
Quality Characteristics ◽  
The Other ◽  
Cumulative Yield ◽  
Yield Efficiency ◽  
Resistant Cultivars ◽  
Randomized Complete Block Design ◽  
Apple Cultivars

Six scab-resistant apple cultivars, Enterprise (CO-OP 30), CO-OP 36, Liberty, Freedom, Nova-Ez-Grow, and NY-754 were propagated on M.26 EMLA. Trees were planted in 1990 in a randomized complete-block design with six replications, five trees per replication. `Empire'/M.26 EMLA was the control cultivar. Tree spacing was 3 m apart in the row and 6 m between rows. Trees were individually staked and trained to a modified spindle bush. Precocity, bloom counts, tree height and width, TCA, cumulative yield efficiency, and fruit quality have been determined annually. `CO-OP 36', `Enterprise', and `Liberty' had significantly higher cumulative yields in 1993–94 than the other cultivars. The same three also had significantly superior fruit quality characteristics. `Liberty' was the most precocious of the scab-resistant cultivars, very similar to `Empire'. `Liberty' was also the weakest-growing cultivar, followed by `Empire'.

Organic Farming System for Producing Healthy Rice Oleh

2018 ◽  
Vol 9 (04) ◽  
pp. 20213-20217
Author(s):  
Dr. Ir. Ni.Gst.Ag.Gde Eka Martiningsih ◽  
Dr.Ir. I Putu Sujana, MS
Keyword(s):  
Elementary Education ◽  
Dry Weight ◽  
Farming System ◽  
Rice Cultivation ◽  
Cultivation System ◽  
Organic Rice ◽  
Organic Cultivation ◽  
A Value ◽  
Cultivation Technology ◽  
Organic Farming System

Introduction of organic rice-based rice cultivation technology package through demplot is done in Subak Sungi 1 using ciherang variety. The number of farmers participating in demonstration plots in organic cultivation of paddy-based rice cultivation were 5 people, with age of farmers aged greater than 55 years occupying the highest percentage (45.45%), with elementary education level (72.75%), followed by high school education (18.25%), and junior high (9%). The average farmland area is 34.63 acres, with self-owned status (55,94%), status as penyakap 41,18% and rent status 2,88%. The farmers' response to the organic rice-based rice planting assessment is quite high, as evidenced by the evaluation that 100% of farmers participating in demonstration plots know and understand about organic rice system cultivation, and they agree to develop this cultivation system in the future. Demplot research results can increase the yield components and weight of dry grain harvest per hectare. Organic rice-based rice cultivation technology EVAGRO able to increase production of dry grain harvest significantly with a value of 6.8 tons / ha. There is a tendency of dry weight value of ciherang varieties of 6.8 tons / ha giving highest but not significantly different with PGPR organic based technology.

scholarly journals Sweet pepper production in substrate in response to salinity, nutrient solution management and training system

2011 ◽  
Vol 29 (3) ◽  
pp. 275-281 ◽  
Author(s):  
José S Rubio ◽  
Walter E Pereira ◽  
Francisco Garcia-Sanchez ◽  
Luis Murillo ◽  
Antonio L García ◽  
...  
Keyword(s):  
Nutrient Solution ◽  
Fruit Quality ◽  
Block Design ◽  
Sweet Pepper ◽  
Training System ◽  
Fruit Yield ◽  
Salt Treatment ◽  
Hoagland Solution ◽  
Half Strength ◽  
Marketable Fruit

The objective of the present study was to evaluate the marketable fruit yield of sweet pepper plants (Capsicum annuum cv. Orlando) in function of the management of nutrient solution with training system. Plants were grown on coconut coir dust under greenhouse conditions in the southeast of Spain. A randomized block design in split-split plot with four blocks was used to test the effect of the nutrient solution strength (full or half-strength Hoagland nutrient solution), training system (two and three stems per plant) and water salinity (saline and non-saline) on total and marketable yield, fruit quality, and fruit mineral concentration. Salt treatment decreased fruit yield by decreasing the fruit fresh weight but not the number of fruits per plant. Under saline and non-saline conditions, the higher yield of fruits was obtained in plants watered with half-strength Hoagland solution, and grown with three stems per plant. Blossom end rot incidence increased under saline conditions or using full-strength Hoagland solution, but decreased with the combination of half-strength Hoagland solution and three-stem training system. Salt treatment also decreased fruit quality in all the treatments due to a decrease in PO2-, SO4(2-), Fe2+;3+, Cu1+;2+ and Mn2+ concentrations, and fruit shape index. Likewise, plants exposed to salinity and watered with half-strength Hoagland solution and trained with three stems showed a reduction in juice glucose and fructose concentration. Based on these results, an increase of the marketable fruit yield could be obtained under non or moderate saline conditions with the implementation of suitable culture practices.

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.

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