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Avaliacao e selecao de variedades de mandioca com a participacao de agricultores do semi-arido do Nordeste brasileiro. Infoteca-e
FUKUDA, W. M. G.; FUKUDA, C.; CALDAS, R. C.; CAVALCANTI, J.; TAVARES, J. A.; MAGALHAES, J. A.; NUNES, L. C..
Este trabalho teve por objetivos avaliar e selecionar variedades de mandioca com a participacao de agricultores do Semi-arido do Nordeste brasileiro. Foi utilizada a metodologia de pesquisa participativa a qual se fundamenta na maior integração entre pesquisadores, extensionistas e agricultores na selecao de novas variedades de mandioca. No trabalho, realizado no periodo de 1996 a 1998, foram estabelecidas trinta e uma provas participativas em propriedades de agricultores localizadas no Semi-arido dos estados do Ceara, Pernambuco, Bahia e Sergipe. Em cada prova foram plantados nove clones melhorados mais a variedade local. Cada prova foi composta de 50 plantas por clone, sem repeticao, utilizando-se o manejo tradicional do agricultor. Foram feitas analises...
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E) Palavras-chave: Avaliacao; Evaluation; Mandioca; Manihot Esculenta; Seleção; Variedade; Cassava; Selection criteria; Varieties.
Ano: 2000 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/134126
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Comparison of selection indexes for dairy goats in the tropics - doi: 10.4025/actascianimsci.v35i3.16049 Animal Sciences
Lopes, Fernando Brito; Universidade Federal de Goiás; Silva, Marcelo Corrêa da; Universidade Federal de Goiás; Fioravanti, Maria Clorinda Soares; Universidade Federal de Goiás; Facó, Olivardo; Empresa Brasileira de Pesquisa Agropecuária; McManus, Concepta; Universidade Federal do Rio Grande do Sul.
The selection process in dairy goat was evaluated by selection indexes. Basal population of 1,000 does, randomly mated by 50 unselected and unrelated bucks, was simulated. Eight selection indexes in two production systems (intensive - indexes I-IV and semi-intensive - indexes V-XIII) were compared. Three groups of dairy goats (A, B and C) were simulated with a respective intensity of 10, 25 and 50%. Each group was composed of five generations and each generation was replicated 20 times. All traits were simulated using matrices of direct additive genetic and the residual (co)variance and the effect of Mendelian segregation. Statistical analyses were performed by repeated measurements in time. Selection using the suggested indexes improved all traits....
Tipo: Info:eu-repo/semantics/article Palavras-chave: 5.04.02.00-5 first calving; Milk; Breeding goals; Selection criteria; Total solids.
Ano: 2013 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/16049
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Do explicit criteria help in selecting indicators for ecosystem-based fisheries management? ArchiMer
Rochet, Marie-joelle; Rice, Jake.
An evaluation framework developed to help select an appropriate suite of indicators to support an ecosystem approach to fisheries management was tested experimentally by asking independent experts to weight the selection criteria provided and to score indicators against those criteria in several ecological settings. The steps in selecting indicators proved to be prone to subjectivity and value judgement, and differences in scores between experts were the main factor contributing to variability in evaluation results. Having to justify scores in a written document did not improve consistency among the experts. The framework, however, did enhance transparency by explicitly stating each issue to be addressed in the selection process, and by giving experts or...
Tipo: Text Palavras-chave: Selection criteria; Indicators; Fisheries management; Ecosystems; Criteria weights.
Ano: 2005 URL: http://archimer.ifremer.fr/doc/2005/publication-483.pdf
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Provenance and family variation of Pinus caribaea var. hondurensis from Guatemala and Honduras, grown in Brazil, Colombia and Venezuela PAB
Moura,Vicente Pongitory Gifoni; Dvorak,William Stephen.
Pinus caribaea var. hondurensis (Sénécl) Barr. & Golf. is a tropical pine that naturally occurs in lowland areas of Belize, El Salvador, Guatemala, Honduras, Nicaragua, and eastern Mexico. It has been one of the most studied tropical pines and the one with the most commercial importance in Brazil. The objective of this work was to select the best provenances for plantations and best trees in families for the establishment of seed orchards. For that a trial with five provenances and 47 open-pollinated families was planted near Planaltina, Federal District, in the Cerrado Region of Brazil. The provenances tested were Poptun (Guatemala), Gualjoco, Los Limones, El Porvenir and Santa Cruz de Yojoa (Honduras) and assessed at 12 years of age. Poptun and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Pinus; Selection criteria; Genetic gain; Heritability; Breeding methods.
Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2001000200003
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Selection index based on phenotypic and genotypic values predicted by REML/BLUP in Papaya Rev. Bras. Frutic.
Moreira,Sarah Ola; Kuhlcamp,Karin Tesch; Barros,Fabíola Lacerda de Souza; Zucoloto,Moises; Godinho,Tiago de Oliveira.
Abstract Selection of superior genotypes based on the simultaneous responses to different characteristics is a fundamental strategy in plant breeding. This study aimed to compare the efficiency of four selection index constructed using phenotypic and genotypic values in a segregating population of the cultivar Rubi Incaper 511. Eight morpho-agronomic variates and the severity of black-spot and phoma-spot were evaluated under field conditions. The classical selection index were calculated based on non-standardized phenotypic means (NSM), standardized means (SM), and genotypic values predicted by REML/BLUP (GVP), using predetermined economic weights. Additionally, the rank sum (RS) was obtained on the basis of the classification of individuals in these...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Carica papaya L.; Selection criteria; Mixed model; Selection differential.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452019000100802
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Selection indices for agronomic traits in segregating populations of soybean Rev. Ciênc. Agron.
Bizari,Eduardo Henrique; Val,Bruno Henrique Pedroso; Pereira,Elise de Matos; Mauro,Antonio Orlando Di; Unêda-Trevisoli,Sandra Helena.
ABSTRACT In genetic improvement of the soybean crop, the selection process is complex and greatly influenced by the environment. One of the alternatives for facilitating this process is the use of selection indices, making it possible to select desirable genotypes for the early generations of breeding programs. The aim of this study was to compare different selection indices in segregating populations of soybean, indicating methods which are superior in various situations, and proposing economic weightings in order to obtain higher gains. Direct and indirect selection criteria were used, together with the classic Smith-Hazel index, an index based on the sum ranks of Mulamba and Mock, a Williams base index, an index based on the desired gains of Pesek and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Glycine max; Selection criteria; Genetic improvement.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902017000100110
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