scholarly journals Prediction of genetic gains by selection indexes and REML/BLUP methodology in a population of sour passion fruit under recurrent selection

2017 ◽  
Vol 39 (2) ◽  
pp. 183 ◽  
Author(s):  
Fernando Higino de Lima e Silva ◽  
Alexandre Pio Viana ◽  
Jôsie Cloviane De Oliveira Freitas ◽  
Eileen Azevedo Santos ◽  
Daniele Lima Rodrigues ◽  
...  
Keyword(s):  
Recurrent Selection ◽  
Block Design ◽  
Total Yield ◽  
Passion Fruit ◽  
Soluble Solids ◽  
Transverse Diameter ◽  
Genetic Gains ◽  
Breeding Programmes ◽  
Selection Indexes ◽  
Selection Of

Breeding programmes must be improved to accelerate the development of new cultivars due to the commercial importance of passion fruit. This study compared four selection indexes and the REML/BLUP methodology in an assessment of predicted genetic gains in the traits of interest. A total of 81 full-sib progenies derived from the third cycle of recurrent selection were assessed for one harvest in one environment. The experiment was arranged in a randomized complete block design with five plants per plot. The following traits were assessed: number of fruits, total yield, fruit mass, fruit longitudinal diameter, fruit transverse diameter, fruit pulp percentage, shell thickness and content of soluble solids. The Mulamba & Mock index produced the best results for the selection of progenies. The REML/BLUP method was the most efficient and selected progenies with predicted genetic gains better than the selection indexes tested. 

scholarly journals Agronomic potential of BC1F2 dwarf round tomato populations

2020 ◽  
Vol 44 ◽  
Author(s):  
Rafael Resende Finzi ◽  
Gabriel Mascarenhas Maciel ◽  
Hugo Gabriel Peres ◽  
Marina Freitas e Silva ◽  
Joicy Vitória Miranda Peixoto ◽  
...  
Keyword(s):  
Block Design ◽  
Selection Index ◽  
Genetic Material ◽  
Fruit Shape ◽  
Economic Benefits ◽  
Fruit Weight ◽  
Soluble Solids ◽  
Transverse Diameter ◽  
Agronomic Potential ◽  
Selection Of

ABSTRACT The use of dwarf lines to obtain mini-tomato hybrids has provided agronomic and economic benefits. In Brazil, round tomatoes predominate over other varieties. The benefits of using a dwarf parent in round tomato hybrids has yet to be explored, making it important to develop dwarf round tomato lines. Backcrossing is the most suitable method to develop these lines. Evaluation and selection of the dwarf populations can improve the development of such lines. Thus, the aim of this study was to select BC1F2 populations of dwarf round tomatoes with agronomic potential and high-quality fruit. The study was conducted at the Vegetable Experimental Station of the Federal University of Uberlândia (UFU). A randomized block design was used, with 15 treatments and three replicates. The genetic material analyzed consisted of 12 BC1F2 dwarf tomato populations, plus both parents (recurrent and donor) and a commercial hybrid. The characteristics assessed were: average fruit weight (g), total soluble solids (ºBrix), number of locules (locules per fruit-1), fruit shape, pulp thickness (cm), longitudinal (cm) and transverse fruit diameter (cm), internode length (cm) and plant height (cm). The data were submitted to mean testing, multivariate analyses and a selection index. In general, average fruit weight in the dwarf populations increased significantly after the first backcross, with some fruits exhibiting a similar shape to round tomatoes. Selection of the populations UFU-DTOM7, UFU-DTOM10, UFU-DTOM5, UFU-DTOM9, and UFU-DTOM3 resulted in an estimated 6% increase in the number of locules, transverse diameter, TD/LD ratio and average fruit weight. The BC1F2 dwarf populations UFU-DTOM7 and UFU-DTOM10 were the most promising for develop inbred lines with round fruits. Despite the considerable progress achieved in this study, we suggest a second backcross, in order to obtain lines and, posteriorly, hybrids with round fruits and compact plants.

scholarly journals Intrapopulation recurrent selection by mixed models in papaya of the formosa group

2018 ◽  
Vol 40 (3) ◽  
Author(s):  
Sarah Ola Moreira ◽  
Karin Tesch Kuhlcamp ◽  
Fabíola Lacerda de Souza Barros ◽  
Moises Zucoloto ◽  
Alyce Carla Rodrigues Moitinho
Keyword(s):  
Mixed Models ◽  
Recurrent Selection ◽  
Block Design ◽  
Soluble Solids ◽  
Genetic Gains ◽  
Selection Strategies ◽  
Randomized Block Design ◽  
Effective Selection ◽  
Solids Content ◽  
The Individual

Abstract Few cultivars of papaya from the Formosa group are available to producers, and the development of new genotypes is indispensable. Thus, the use of effective selection strategies to obtain more productive cultivars and better quality fruits is also necessary. The aim of this study was to select of half-sib families (HSF) of papaya using the methodology of mixed models. Nineteen HSFs from the Incaper’s papaya breeding program were evaluated in a randomized block design with five replicates and nine plants per plot. The selection was made based on fruit mass (FM), pulp thickness (PT), soluble solids content in pulp (SS) and number of fruits (NF). The genetic parameters and genotypic values were estimated by the REML/BLUP procedure. The selected HSFs increased FM by 26.1%; the PT in 10.5%; the SS in 7.5% and; the NF in 13.0%. The additive heritability within the progenies and the individual variation coefficient obtained indicate that the selection between and within the HSFs can provide greater genetic gains. The selection based on the REML/BLUP methodology was efficient to obtain simultaneous genetic gains for all variables under study despite the negative correlation between them.

scholarly journals Selection indexes in the simultaneous increment of yield components in topcross hybrids of green maize

2020 ◽  
Vol 55 ◽  
Author(s):  
Willame dos Santos Candido ◽  
Caique Machado e Silva ◽  
Maraiza Lima Costa ◽  
Bruna Elaine de Almeida Silva ◽  
Beatriz Lima de Miranda ◽  
...  
Keyword(s):  
Yield Components ◽  
Block Design ◽  
Yield Traits ◽  
Genetic Gains ◽  
Economic Weights ◽  
Randomized Complete Block Design ◽  
Selection Indexes ◽  
Best Fit ◽  
Topcross Hybrids ◽  
Selection Of

Abstract: The objective of this work was to define the most suitable selective strategy for the simultaneous increment of yield components of green maize, by comparing three selection indexes weighted by economic weights and by the REML/BLUP method, in the assessment of predicted genetic gains for traits of interest. An experiment with 75 topcross hybrids from partially inbred S1 lines of green maize was carried out in Jataí, in the state of Goiás, Brazil, using a randomized complete block design, with four replicates. The following yield traits were evaluated: straw ears and commercial ears, grain mass, ear length, ear diameter, and number of ear rows. The selection indexes of Smith and Hazel, Williams, and Mulamba & Mock were applied and weighted for four economic weights (1, CVg, CVg/CVe, and h2). Among the tested selection indexes, those of Williams and Mulamba & Mock are the best-fit ones for the selection of topcross hybrids of green maize, as they provide positive and more balanced selection gains for all evaluated traits. The REML/BLUP method shows better predicted genetic gains than those achieved by the three selection indexes, besides being efficient for the selection of topcross hybrids of green maize.

scholarly journals Genetic parameters and estimated genetic gains in young rubber tree progenies

2013 ◽  
Vol 48 (4) ◽  
pp. 411-416 ◽  
Author(s):  
Cecília Khusala Verardi ◽  
Erivaldo José Scaloppi Junior ◽  
Guilherme Augusto Peres Silva ◽  
Lígia Regina Lima Gouvêa ◽  
Paulo de Souza Gonçalves
Keyword(s):  
Genetic Gain ◽  
Genetic Parameters ◽  
Block Design ◽  
Rubber Tree ◽  
First Year ◽  
Genetic Gains ◽  
Selection Gain ◽  
Randomized Block Design ◽  
Using Data ◽  
Selection Of

The objective of this work was to assess the genetic parameters and to estimate genetic gains in young rubber tree progenies. The experiments were carried out during three years, in a randomized block design, with six replicates and ten plants per plot, in three representative Hevea crop regions of the state of São Paulo, Brazil. Twenty-two progenies were evaluated, from three to five years old, for rubber yield and annual girth growth. Genetic gain was estimated with the multi-effect index (MEI). Selection by progenies means provided greater estimated genetic gain than selection based on individuals, since heritability values of progeny means were greater than the ones of individual heritability, for both evaluated variables, in all the assessment years. The selection of the three best progenies for rubber yield provided a selection gain of 1.28 g per plant. The genetic gains estimated with MEI using data from early assessments (from 3 to 5-year-old) were generally high for annual girth growth and rubber yield. The high genetic gains for annual girth growth in the first year of assessment indicate that progenies can be selected at the beginning of the breeding program. Population effective size was consistent with the three progenies selected, showing that they were not related and that the population genetic variability is ensured. Early selection with the genetic gains estimated by MEI can be made on rubber tree progenies.

scholarly journals Associations among production and physicochemicalquality fruit traits in Passion fruit populations subjected to three cycles of intrapopulation recurrent selection

2018 ◽  
Vol 40 (5) ◽  
Author(s):  
Natan Ramos Cavalcante ◽  
Alexandre Pio Viana ◽  
Paulo Ricardo dos Santos ◽  
Sandra da Costa Preisigke ◽  
Rodrigo Moreira Ribeiro ◽  
...  
Keyword(s):  
Recurrent Selection ◽  
Fruit Production ◽  
Important Variable ◽  
Passion Fruit ◽  
Soluble Solids ◽  
Direct Selection ◽  
Production Traits ◽  
Average Mass ◽  
Explanatory Variables ◽  
Half Sibling

Abstract The present study was developed to identify the direct and indirect effects of fruit production traits in passion fruit on traits of agronomic interest as well as determine possible changes in associations between the characters after three cycles of recurrent selection. Twenty three half-sibling progenies were evaluated for the characteristics number of fruits per plant; fruit mass per plant (g); pulp percentage (%); fruit length and diameter (mm); peel thickness (mm); total soluble solids content (ºBrix); pH; and yield per plant (kg). Fruit production per plant was considered the main variable, while the others were considered explanatory variables. Within-family heritability (h2ad) values were lower than the mean heritability of the progeny (h2mp). Path analysis revealed that the direct selection of genotypes with higher number of fruits or fruit average mass results in increased production per plant; however, indirect selection is inefficient in providing simultaneous gains. Therefore, by observing the correlations throughout selection cycles, it can be stated that although production per plant is the most important variable, preference should be given to the use of selection indices, as there are better chances of obtaining gains for fruit quality and production traits in selection across half-sibling passion fruit progenies.

scholarly journals Gene effect and heritability of yield and its components in eggplant

2020 ◽  
Vol 28 (2) ◽  
pp. 227-239
Author(s):  
N.T. Afful ◽  
D. Nyadanu ◽  
R. Akromah ◽  
H.M. Amoatey ◽  
V. Oduro ◽  
...  
Keyword(s):  
Plant Height ◽  
Recurrent Selection ◽  
Gene Action ◽  
Block Design ◽  
Solanum Melongena ◽  
Fruit Weight ◽  
Fruit Yield ◽  
Dominance Model ◽  
Days To Flowering ◽  
Breeding Programmes

Eggplant (Solanum melongena L.) is one of the most important fruit vegetables in the world, with several nutritional and medicinal benefits. However, little is known about the genetic divergence of yield and its related traits. The objective of this study was to explore gene action and heritability of traits to help direct and strengthen breeding programmes, geared towards improving yield of the crop. Six generations (P1, P2, F1, F2, BC1 and BC2) derived from two crosses (SM001-07 x ST004-03 and SM001 x San005-01) of eggplant accessions, were grown in pots in an open field, using Randomised Complete block Design (RCBD). Estimated data indicated that, the additive-dominance model was adequate to demonstrate the genetic variation and its significance in the inheritance of fruit weight, days to flowering and fruit yield traits. Although non-allelic interactions were found in plant height and number of seeds, additive effect was more pronounced in the genetic control of days to flowering and fruit weight; while dominance effect was more important in the control of plant branching and fruit length. Plant height and fruit yield were influenced by complementary gene action. Furthermore, the study revealed low magnitudes of dominance and environmental variances for most traits showing higher heritability values. In view of the diverse gene actions, with additive, dominant and epistasis, playing significant roles in the control of different traits, backcross, recurrent selection or bi parental could be appropriate for advancing the segregating populations to meet the need of yield improvement in both crosses. Key words: Additive, dominance, Epistasis, gene action

scholarly journals Qualidade pós-colheita de maracujá-amarelo em função de porta-enxertos e ambientes de cultivo

2017 ◽  
Vol 7 (4) ◽  
pp. 504
Author(s):  
Silvia De Carvalho Campos Botelho ◽  
Dulândula Silva Miguel-Wruck ◽  
Givanildo Roncatto ◽  
Suzinei Silva Oliveira ◽  
Fernando Mendes Botelho ◽  
...  
Keyword(s):  
Fruit Quality ◽  
Block Design ◽  
Physicochemical Characteristics ◽  
Passion Fruit ◽  
Soluble Solids ◽  
Skin Thickness ◽  
Length Variation ◽  
Environment Interaction ◽  
Total Acidity ◽  
Mato Grosso

The objective of this study was to evaluate the influence of rootstocks on passion fruit physicochemical characteristics. The experiment was conducted in two properties in Terra Nova do Norte municipality, Mato Grosso State, Brazil. The experiment was conducted in a 2×8 factorial, in a completely randomized block design with four repetitions, being two growing environments (Environment 1 and Environment 2) and seven rootstocks with one control. The rootstocks used were: CPAC M5-H-67, H-CPAC MJ-65, CPAC MJ-45-03, CPAC MJ-H-68, Passiflora nitida (PN), P. alata (PA) and P. edulis (PE), under the canopy of a yellow passion fruit, BRS Gigante Amarelo cultivar. The same cultivar without rootstock was used as a control. The fruits were randomly harvest from each block. The following physical, physicochemical and chemical analysis were performed: weight, fruit length and diameter of the fruit, skin thickness, total soluble solids content (TSS), total acidity (TA), TSS/TA and vitamin C content. The use of rootstocks and rootstocks x environment interaction influenced the passion fruit physical characteristics. The environments influenced fruit quality, except for total acidity content. Environment 1 resulted in best fruit quality. For the Environment 2 no weight and length variation caused by rootstocks was observed. All analyzed rootstocks produced fruit with suitable characteristics for ‘in natura’ consumption or industrialization.

scholarly journals Selection of half-sib families of creole melon (Cucumis melo L.) on the Ecuadorian coast

2019 ◽  
Vol 13 (2) ◽  
pp. 178-185
Author(s):  
Francisco Espinosa ◽  
Franco Alirio Vallejo ◽  
Lauden Rizzo
Keyword(s):  
Block Design ◽  
Fruit Weight ◽  
Soluble Solids ◽  
Genetic Progress ◽  
Randomized Complete Block Design ◽  
Sib Families ◽  
High Production ◽  
Cucumis Melo L ◽  
Fruit Diameter ◽  
Selection Of

The creole melon cantaloupe is a horticultural species, whose fruits are used for human nutrition. However, no research has been reported on their genetic variability for starting breeding processes. The objective of this study was to take advantage of the variability of creole melons for genetic improvement. 20 creole melon half-sib families were selected and evaluated for production characteristics and fruit quality in order to obtain improved populations. The study was carried out in Palenque canton, Ecuador. Seeds from 20 half-sib families were used, arranged in a randomized complete block design with three replications. The differences between the families were significant for all the studied characteristics. Family 93 presented higher averages for fruit weight, fruit diameter and production (per hectare), and family 196 did so for soluble solids. The phenotypic correlations were positive and significant between the fruit weight and fruit diameter, fruit length, pulp thickness, fruit cavity, soluble solids and production. The coefficients of genetic variation, in general, were lower than the coefficients of environmental variation. The estimates of heritability broadly had a moderate magnitude (30-60%) for the 10 evaluated characteristics, and the magnitude of the expected genetic progress was low (<10%) for the fruit weight, production, and soluble solids, so the selection for high production should focus on fruit weight and soluble solids.

scholarly journals Physicochemical Quality, Antioxidant Capacity and Nutritional Value in Tuberous Roots of Some Wild Dahlia Species

2019 ◽  
Vol 47 (3) ◽  
Author(s):  
Esteban A. RIVERA-ESPEJEL ◽  
Oscar CRUZ-ALVAREZ ◽  
José M. MEJÍA-MUÑOZ ◽  
María R. GARCÍA-MATEOS ◽  
María T.B. COLINAS-LEÓN ◽  
...  
Keyword(s):  
Antioxidant Capacity ◽  
Nutritional Value ◽  
Block Design ◽  
Titratable Acidity ◽  
Soluble Solids ◽  
Digital Object Identifier ◽  
Physicochemical Quality ◽  
Tuberous Roots ◽  
Randomized Complete Block Design ◽  
Selection Of

The aim of this research was to evaluate the physicochemical quality, antioxidant capacity and nutritional value in tuberous roots of some wild dahlia species. The experiment was carried out in the Department of Plant Science of the Autonomous University Chapingo, Mexico. Plants were established in a randomized complete block design with five replications. The total soluble solids (TSS), titratable acidity (TA), vitamin C (VC), total phenols (TP), antioxidant capacity (AC), inulin and its proximate composition were evaluated. Among the materials analyzed, the most outstanding wild species were Dahlia campanulata, D. coccinea and D. brevis, where D. campanulata stood out for its concentration of VC (0.05 mg 100 g-1), AC (1.88 mg VCEAC g-1), inulin, DM and TC (72.25, 24.38 and 88.37%, respectively), however, the inulin content was similar to D. coccinea (66.17%), which was also outstanding with respect to the content of TP (1.74 mg GA g-1). Likewise, D. brevis presented the highest values of RFi (5.49%) and A (78.42%). According to our results, the tuberous roots of wild dahlia species can be used as food, as well as being a source of selection of traits of nutraceutic interest for genetic improvement.   ********* In press - Online First. Article has been peer reviewed, accepted for publication and published online without pagination. It will receive pagination when the issue will be ready for publishing as a complete number (Volume 47, Issue 3, 2019). The article is searchable and citable by Digital Object Identifier (DOI). DOI link will become active after the article will be included in the complete issue. *********  

scholarly journals (Z)-3-Hexenyl Butyrate Induces Stomata Closure and Ripening in Vitis vinifera

Agronomy ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 1122
Author(s):  
Celia Payá ◽  
M. Pilar López-Gresa ◽  
Diego S. Intrigliolo ◽  
Ismael Rodrigo ◽  
José María Bellés ◽  
...  
Keyword(s):  
Vitis Vinifera ◽  
Field Experiments ◽  
Negative Impact ◽  
Block Design ◽  
Stomatal Closure ◽  
Total Yield ◽  
Soluble Solids ◽  
Vitis Vinifera L ◽  
Randomized Block Design

Agronomy solutions for modifying pre-harvest grape ripening are needed for a more sustainable viticulture. Field experiments were performed in Vitis vinifera L. vines to study the effect of the previously described stomata-closing compound (Z)-3-hexenyl butyrate (HB). Exogenous treatments at different doses were periodically carried out using a randomized block design. Firstly, we observed that HB was able to induce stomatal closure in grapevine plants. Under field conditions, the application of HB around veraison induced a higher color intensity in berries, and vines treated at higher doses reached this stage earlier than the un-treated controls. There was also a clear increase in both grape anthocyanin concentration and total soluble solids without having a negative impact on total yield. We therefore, confirm the role of HB as a universal natural stomatal closure compound and propose a new use for HB in viticulture as a ripening inducer, by accelerating anthocyanin accumulation.

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