Índices de seleção no aprimoramento simultâneo dos componentes da produção de frutos em açaizeiro

Teixeira, Davi Henrique Lima; Oliveira, M. do S. P. de; Gonçalves, Flávia Maria Avelar; Nunes, José Aírton Rodrigues

doi:10.1590/s0100-204x2012000200012

Cited by 26 publications

(14 citation statements)

References 17 publications

(19 reference statements)

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“…The selection gain for the remaining characteristics was deemed less significant due to the low coefficient of genetic variation (data not shown). The selection index used here proved satisfactory in alfafa (Vasconcelos et al, 2010), açaí (Teixeira et al, 2012), passion fruit (Rosado et al, 2012), popcorn (Freitas et al, 2013), potato (Terres et al, 2015), soybean (Bizari et al, 2017) and tomato (Nick et al, 2013).…”

Section: Resultsmentioning

confidence: 87%

Agronomic potential of BC1F2 dwarf round tomato populations

et al. 2020

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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.

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Section: Resultsmentioning

confidence: 87%

Agronomic potential of BC1F2 dwarf round tomato populations

et al. 2020

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“…Based on the classical index, predicted gains were maximized for all traits when it was used genetic variation coefficient, standard deviation, and heritability coefficient at the family level, as economic weights (Table 5). Teixeira et al (2012) evaluated 25 progenies of açaí palm and observed small fruit production gains when the genetic variation Table 1. Summary of the variance analysis of dry matter production (DMP), number of tillers (NT), stem diameter (SD), plant height (PH), and neutral detergent fiber (NDF) for full-sib families of elephant grass in two harvest cuts (C) coefficient and average progeny heritability were used as economic weights.…”

Section: Resultsmentioning

confidence: 99%

Selection among and within full-sib families of elephant grass for energy purposes

Silva

Daher

Menezes

et al. 2018

Crop Breed. Appl. Biotechnol.

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Pennisetum purpureum Schum. has been a key alternative as an energy source in Brazil because of its higher dry matter accumulation and fiber content. This research aimed to select superior individuals of P. purpureum for energy purposes using among-and-within family selection. The study was carried out in Campos dos Goytacazes-RJ (Brazil), using eight full-sib families. Plants were individually assessed during two pasture cuttings, one in 2014, and another in 2015. The dry matter production (DMP) was correlated with the number of tillers, stem diameter, plant height, and neutral detergent fiber content. Plant selection criteria in both cuts were through direct and indirect selections, and Smith and Hazel index. A joint analysis of variance showed significant differences for all five traits assessed in both cuts. The results achieved with Smith and Hazel index were promising for simultaneous selection of the evaluated traits, favoring selection of superior families and individuals them.

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“…Other characters that had a relative participation in the observed divergence were: FYB, with 7.9% for accessions and 15.4% for sources; and NRB, with 6.4% for accessions and 12.3% for sources. Both of these characters had already been reported as important for the selection of progenies of purple acai palms, aiming at fruit production (Farias Neto et al, 2008;Teixeira et al, 2012;Oliveira et al, 2015;Yokomizo et al, 2016). Moreover, the first character stood out because it facilitates the choice, by the breeder, of progenies according to fruit size -small fruits are preferred by sellers, due to the larger amount of pulp after being processed (Farias Neto et al, 2011).…”

Section: Resultsmentioning

confidence: 99%

Genetic divergence among white-type acai palm accessions based on morpho-agronomic characters

Sousa

Oliveira

Neto

2017

Pesq. agropec. bras.

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-The objective of this work was to quantify the genetic divergence among accessions of white-type acai palm (Euterpe oleracea), through morpho-agronomic characters. The accessions belong to the active acai palm germplasm bank of Embrapa Amazônia Oriental. Thirteen characters were evaluated in 26 accessions, originated from six municipalities in the state of Pará, Brazil. The data were subjected to deviance and multivariate analyses, based on the average Euclidean distance, and were grouped by Tocher's method and the unweighted pair group method with arithmetic mean (UPGMA). The accessions differed for eight characters. The distances among accessions ranged from 0.64 to 2.62, with an average of 1.36, and four groups were formed by Tocher's method and two by the UPGMA. Seven major components explained 88.03% of the variation, whose graphic dispersion showed the tendency of forming four groups. The characters weight of 100 fruits, number of rachillae per bunch, and fruit yield per bunch contributed the most to the divergence, and the accessions from the municipalities of Breves, Curralinho, and Limoeiro do Ajuru were the most divergent. Therefore, the accessions of white acai palm show strong divergence and variability, which favor the selection of desirable individuals.

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Índices de seleção no aprimoramento simultâneo dos componentes da produção de frutos em açaizeiro

Cited by 26 publications

References 17 publications

Agronomic potential of BC1F2 dwarf round tomato populations

Agronomic potential of BC1F2 dwarf round tomato populations

Selection among and within full-sib families of elephant grass for energy purposes

Genetic divergence among white-type acai palm accessions based on morpho-agronomic characters

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