-The genetic diversity of 38 accessions of the genus Capsicum from the upper Rio Negro in the Amazon region was characterized by 51 morphologic descriptors. The similarity of the accessions was calculated based on 17 essential descriptors and on the general similarity coefficient of Gower. Grouping analyses and a dispersion diagram of the accessions were established based on the similarity coefficients using, respectively, the UPGMA method and the principal coordinate analysis (PCO) as criterion of grouping and dispersion. A great variation of classes were identified in the fruit traits: nine colors, four shapes and a great range of variation in
Visando quantificar os efeitos diretos e indiretos de componentes de produção sobre as variáveis tonelada de cana por hectare (TCH) e massa média de colmos (MMC) foram realizadas análises de trilha fenotípicas e genotípicas. Dezessete famílias híbridas foram avaliadas no delineamento experimental em blocos casualizados com quatro repetições, no Centro de Pesquisa e Melhoramento da Cana-de-Açúcar (CECA), da Universidade Federal de Viçosa, com o plantio realizado em janeiro de 2000. Foram definidas como componentes de produção as variáveis: altura de colmos (AC), diâmetro de colmos (DC) e número de colmos (NC). As variáveis MMC e NC podem ser utilizadas na seleção indireta de famílias mais produtivas, uma vez que tiveram efeitos diretos positivos e elevados sobre TCH. Apesar de AC e DC estarem altamente correlacionadas com MMC, apenas DC mostrou elevado efeito genético direto sobre MMC, sendo uma variável importante a ser considerada na seleção indireta de famílias com maior massa média de colmos.
The objective of this research was to quantify the genetic divergence of potential Coffea canephora parents, with the goal of developing progenies that associate the best traits of the Conilon and Robusta botanical varieties for hybrid vigor expression. Thus, 10 morphological and productive characteristics of 130 clones of Conilon and Robusta botanical varieties and their intervarietal hybrids were evaluated over 2 years. The experiment was conducted in a randomized block design with four replicates of four plants per plot. For selection of parents, the main component analysis was used to associate values with reference points obtained from the average of each botanical variety. The first two principal components allowed for the separation of the botanical varieties representing the variability contained in the original data with 76% for the first year and 69% for the second year. Although, the genotype × years interaction had significant effects, there were minor differences in the grouping from one year to the next, which is associated with the higher repeatability estimates observed in this study. It was observed that crosses with the 16-1-81I, 9-1-82L, and 13-1-61I parents of the botanical variety Robusta and the 167I, 890E, and 130I parents of the Conilon botanical variety presented greater potential for obtaining selection gains.
RESUMO.No presente estudo, objetivou-se formar supercaracteres para seleção simultânea de variáveis relacionadas à produção e qualidade dos frutos em famílias de irmãos completos e, ou, meios-irmãos de maracujazeiro amarelo (Passiflora edulis f. flavicarpa). Avaliaram-se 113 famílias e 11 variáveis, no Delineamento I de Comostock e Robinson, em blocos ao acaso com três repetições. A análise de fatores estabeleceu três supercaracteres: tamanho do fruto (TF), produtividade (PROD) e rendimento de indústria (RI). Para grande maioria das variáveis originais, foram verificados sinais de cargas fatoriais que refletem o verdadeiro sentido da seleção em programas de melhoramento de maracujá. Detectou-se variabilidade genética nos níveis hierárquicos de genitor masculino e genitoras femininas dentro de genitor masculino, nos supercaracteres TF, PROD e nas respectivas variáveis originais que os compuseram. O supercaractere RI não apresentou variabilidade em função da não-existência desta nas variáveis que o constituíram. Houve ganhos genéticos preditos, em sentido desejado, nas variáveis formadoras dos supercaracteres tamanho do fruto e produtividade. Portanto, estes podem ser utilizados na seleção simultânea de caracteres relacionados ao tamanho do fruto e à produtividade.Palavras-chave: Passiflora edulis f. flavicarpa, seleção simultânea, análise multivariada, melhoramento genético.ABSTRACT. Development of super-traits for selection of families of yellow passion fruit. This study aimed to establish super-traits for simultaneous selection of variables related to fruit yield and quality in full-sibs and/or half-sib families of yellow passion fruit (Passiflora edulis f. flavicarpa). The Design I of Comstock and Robinson was used, in random blocks with three replications, to evaluate 113 families and 11 variables. Three super-traits were determined by factor analysis: fruit size (TF), productivity (PROD) and industry yield (RI). Signals of factorial charge reflected the true sense of selection in passion fruit breeding programs for most original variables. Genetic variability was detected at the hierarchical levels of male parent and female parent within the male parent for the super-traits TF, PROD and for the respective original variables that represented it. There was no variability in super-trait RI since it was absent in the variables that represented it. Genetic gains were obtained in the desired sense in the determinant variables of the super-traits fruit size and productivity. Consequently, these can be employed in the simultaneous selection of traits related to fruit size and productivity.
The aim of this study was to select Coffea canephora clones of superior processed coffee productivity based on the estimates of the genetic parameters and of genetic progress with the plant selection. For this, the production of processed coffee from 130 clones was evaluated from 2014 to 2016 in a clonal test, installed in randomized complete blocks with four plants per plot and six replications, spaced 3 × 2m at the experiment station Embrapa Rondônia in the municipality of Ouro Preto do Oeste - RO. The estimation of genetic parameters and prediction of genotypic values were performed using REML/BLUP procedure (Restricted Maximum Likelihood/Best Unbiased Linear Prediction). Estimates of the genetic parameters confirmed the predominance of the genetic component in the expression of this trait, indicating the possibility of obtaining gains with the plant selection. Genetic progress of processed coffee productivity from the selection of 10% of the best clones was 49.88%, which is equivalent to an increase in average productivity from 42.57 bags.ha-1 to 66.95 bags.ha-1. The use of the harmonic mean of the genetic values helped to identify the clones of superior performance, with higher adaptability and stability for the northern region of Brazil.
RESUMOSão poucos os softwares disponíveis para a análise de parentesco e, até a presente data, nenhum pode realizar a análise de parentesco para organismos poliplóides, com número par (2k) de cromossomos. Implementou-se junto ao programa R uma rotina capaz de executar a análise de parentesco para qualquer nível 2k de ploidia, número de indivíduos (ou populações) e número de gerações envolvidas na árvore genealógica. A função principal, calc.rxy() calcula o coeficiente de endogamia (F X ) de cada indivíduo; coeficientes de parentesco (r XY ) entre dois indivíduos quaisquer; e coeficiente de parentesco médio, variância, mínimo e máximo, para cada indivíduo. Ela pode mostrar a matriz completa de parentesco ou uma submatriz pré-definida de indivíduos selecionados. Adicionalmente, foram incluidas funções que servem para identificar erros de redundância dos dados originais (checar.nomes()) e para identificar os pares de indivíduos com r XY superior a certo limite especificado pelo pesquisador (corte.rxy()). Essas funções podem ser usadas na análise de pedigrees com um número elevado de indivíduos e poderão ser utilizadas pela comunidade científica livremente, sem restrições à plataforma operacional utilizada. Destaca-se a vantagem em se poder trabalhar com qualquer nível 2k de ploidia, mesmo quando existe a possibilidade de certo indivíduo ser oriundo de autofecundação, aspecto comum em várias espécies vegetais.Palavras-chave: genética de populações, poliplóides, análise de pedigree. ABSTRACT ANALYSIS OF THE INBREEDING AND COANCESTRY COEFFICIENTS FOR ANY PLOIDY LEVEL USING THE STATISTICAL PACKAGE RThere are few softwares available to analyze relatedness among individuals and, to date, none can perform this analysis for polyploid organisms, with even number (2k) of chromosomes. This work implements within package able to execute an analysis of relatedness for any 2k-ploidy level, number of individuals (or populations) and number of generations in the pedigree. The main function, calc.rxy(), calculates the inbreeding coefficient (F X ) of each individual; coancestry coefficients (r XY ) between any two individuals; and average, variance, minimum and maximum of coancestry coefficient for each selected individual. A complete matrix of coancestry or any sub-matrix for selected individuals can be output. In
Oil palm, in view of the worldwide consumed oil, is a perennial crop of great importance. Nevertheless
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
334 Leonard St
Brooklyn, NY 11211
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.