Phenotypic Variances
Mostrando 1-12 de 35 artigos, teses e dissertações.
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1. Simultaneous selection for yield, adaptability, and genotypic stability in immature cowpea using REML/BLUP
Resumo: O objetivo deste trabalho foi selecionar genótipos de feijão-caupi simultaneamente para alta produção de grãos imaturos, adaptabilidade e estabilidade genotípica, ao se considerar interações genótipos x ambientes. Foram utilizados os modelos mistos máxima verossimilhança restrita (REML)/melhor predição linear não viciada (BLUP). Avaliar
Pesq. agropec. bras.. Publicado em: 25/11/2019
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2. Heritability of morpho-agronomic traits in ornamental pepper
Abstract This study was conducted to identify the allelic interactions and genetic effects involved in genetic control of quantitative traits in Capsicum annuum. Six generations (P1, P2, F1, F2, BC1 and BC2) were used to study the variances, means and allelic interactions of 16 quantitative traits evaluated. The additive part of the phenotypic variance found
Crop Breed. Appl. Biotechnol.. Publicado em: 31/10/2019
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3. Interactive effects of genotype x environment on the live weight of GIFT Nile tilapias
ABSTRACT In this paper, the existence of a genotype x environment interaction for the average daily weight in GIFT Nile tilapia (Oreochromis niloticus) in different regions in the state of Paraná (Brazil) was analyzed. The heritability results were high in the uni-characteristic analysis: 0.71, 0.72 and 0.67 for the cities of Palotina (PL), Floriano (FL) an
An. Acad. Bras. Ciênc.. Publicado em: 11/12/2017
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4. Quantitative genetics theory for genomic selection and efficiency of breeding value prediction in open-pollinated populations
ABSTRACT To date, the quantitative genetics theory for genomic selection has focused mainly on the relationship between marker and additive variances assuming one marker and one quantitative trait locus (QTL). This study extends the quantitative genetics theory to genomic selection in order to prove that prediction of breeding values based on thousands of si
Sci. agric. (Piracicaba, Braz.). Publicado em: 2016-06
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5. Sclerotia morphology traits and mycelial growth rate are not informative variables for population studies of Sclerotinia sclerotiorum
The usefulness of sclerotia morphology traits and mycelial growth rate to infer phenotypic variability in populations of Sclerotinia sclerotiorum associated with common beans in Minas Gerais State (MG) was assessed in two experiments. Isolates (131) were collected in the Northwestern, Alto Paranaíba, Zona da Mata and Southern regions of MG and the mycelial
Trop. plant pathol.. Publicado em: 2014-12
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6. The use of weighted multiple linear regression to estimate QTL-by-QTL epistatic effects
Knowledge of the nature and magnitude of gene effects, as well as their contribution to the control of metric traits, is important in formulating efficient breeding programs for the improvement of plant genetics. Information concerning a genetic parameter such as the additive-by-additive epistatic effect can be useful in traditional breeding. This report des
Genet. Mol. Biol.. Publicado em: 2012
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7. Avaliacao genetica de progenies em meios-irmaos de seringueira em diferentes regioes do estado de Sao Paulo.
O objetivo do presente trabalho foi avaliar o potencial genetico de progenies de meios-irmaos de seringueira [Hevea brasiliensis (Willd.ex Adr. de Juss.Arg.] em tres diferentes locais do Estado de Sao Paulo. Progenies de 22 genotipos foram obtidas de uma populacao-base introduzida da Malasia. As variaves estudadas foram a producao, avaliada por tres testes p
Pesquisa Agropecuaria Brasileira. Publicado em: 2011
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8. Variance component estimates applying random regression models for test-day milk yield in Caracu heifers (Bos taurus Artiodactyla, Bovidae)
Random regression models (RRM) were used to estimate covariance functions for 2,155 first-lactation milk yields of native Brazilian Caracu heifers. The models included contemporary group (defined as year-month of test and paddock) fixed effects, and quadratic effect of age of cow at calving. Genetic and permanent environmental effects were fitted by a random
Genetics and Molecular Biology. Publicado em: 2008
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9. Developmental genetic analysis of fruit shape traits under different environmental conditions in sponge gourd (Luffa cylindrical (L) Roem. Violales, Cucurbitaceae)
Analysis of genetic main effects and genotype × environment (GE) interaction effects for the fruit shape traits fruit length and fruit circumference in the sponge gourd (Luffa cylindrical (L) Roem. Violales, Cucurbitaceae) was conducted for diallel cross data from two planting seasons. A genetic model including fruit direct effects and maternal effects and
Genetics and Molecular Biology. Publicado em: 2008
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10. Viability of potatoÂs family selection in the early generations / Viabilidade da seleÃÃo de famÃlias de batata em geraÃÃes precoces
Potato selection is practiced according to the advancement of generations In the early generations a number of limitations hamper the genetic gains such as high number of clones use of visual selection and limited numbers of tubers from each genotype Thus research has been directed toward family selection which focus first in the selection of the best famili
Publicado em: 2007
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11. Resistance of common bean to Fusarium oxysporum f. sp. phaseoli. / ResistÃncia do feijoeiro a Fusarium oxysporum f. sp. phaseoli
The Fusarium wilt, caused by the fungus Fusarium oxysporum f. sp. phaseoli, is a severe vascular disease in the common bean, and occurs in all regions where the common bean is cultivated. The better way of controlling the disease is through the use of resistant cultivars. Three kinds of research were done aiming to get informations for making the breeding pr
Publicado em: 2007
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12. Selection index in upland cotton cultivars / Índice de seleção em cultivares de algodoeiro herbáceo
Selection indices are linear combinations of phenotypic values, which combine in one unique value the positive and negative attributes of each genotype for the characters evaluated. Because these indices need estimates of genetic and phenotypic variances and covariances, their use is best suited in recurrent selection programs. However, other types of non-li
Publicado em: 2005