10 documents found, page 1 of 1
Effective population size and genetic gain expected in a population of Coffea c...
MISTRO, J. C.; RESENDE, M. D. V. de; FAZUOLI, L. C.; VENCOVSKY, R.This work aimed to study the effective population size and genetic gain in a population of robusta coffee (Coffea canephora Pierre) and verify the possibility of using recurrent selection. The experiment comprised 25 treatments, consisting of 21 C. canephora progenies and four C. arabica (cultivars) grown in Brazil. The experimental design was a 5x5 quadruple balanced lattice, with 24 replications, with one pla...
Sexual expression and mating system in watermelon: implications for breeding pr...
FERREIRA, M. A. J. da F.; QUEIROZ, M. A. de; VENCOVSKY, R.; BRAZ, L. T.; VIEIRA, M. L. C.; BORGES, R. M. E.This study had the follwing objectives: to investigate the sexual expression in seven watermelon populations; to evaluate some population parameters and the genetic potential of a population (PCS) obtained by crossing and segregating for sexual expression and other traits. For verifying the sexual expression, populations were evaluated with respect to type of flower controlled conditions. Maternal and selfed pr...
Genetic variability of garlic accessions as revealed by agro-morphological trai...
HOOGERHEIDE, E. S. S.; AZEVEDO FILHO, J. A.; VENCOVSKY, R.; ZUCCHI, M. I.; ZAGO, B. W.; PINHEIRO, B. J.The cultivated garlic (Allium sativum L.) displays a wide phenotypic diversity, which is derived from natural mutations and phenotypic plasticity, due to dependence on soil type, moisture, latitude, altitude and cultural practices, leading to a large number of cultivars. This study aimed to evaluate the genetic variability shown by 63 garlic accessions belonging to Instituto Agronômico de Campinas and the Escol...
Outcrossing rates and inbreeding coefficients in rubber trees (Hevea brasiliens...
PAIVA, J. R. de; KAGEYAMA, P. Y.; VENCOVSKY, R.Electrophoretic analyses were carried out in starch gel with young leaves of rubber trees of two native populations from the state of Acre, Brazil.; Made available in DSpace on 2018-07-31T01:37:22Z (GMT). No. of bitstreams: 1 RevBGenet10031011.pdf: 3540127 bytes, checksum: 8b90ff76e4b5a3f1d9f61e0907bbc187 (MD5) Previous issue date: 1997-01-06
Genetic diversity in Brazilian tall coconut populations by microsatellite markers.
RIBEIRO, F. E.; BAUDOUIN, L.; LEBRUN, P.; CHAVES, L. J.; BRONDANI, C.; COSTA, E. F. N.; VENCOVSKY, R.The tall coconut palm was introduced in Brazil in 1553, originating from the island of Cape Verde. The aim of the present study was to evaluate the genetic diversity of ten populations of Brazilian tall coconut by 13 microsatellite markers. Samples were collected from 195 individuals of 10 different populations. A total of 68 alleles were detected, with an average of 5.23 alleles per locus. The mean expected an...
SNP genotyping allows an in-depth characterisation of the genome of sugarcane a...
GARCIA, A. A. F.; MOLLINARI, M.; MARCONI, T. G.; SERANG, O. R.; SILVA, R. R.; VIEIRA, M. L. C.; VICENTINI, R.; COSTA, E. A.; MANCINI, M. C.Many plant species of great economic value (e.g., potato, wheat, cotton, and sugarcane) are polyploids. Despite the essential roles of autopolyploid plants in human activities, our genetic understanding of these species is still poor. Recent progress in instrumentation and biochemical manipulation has led to the accumulation of an incredible amount of genomic data. In this study, we demonstrate for the first ti...
Inbreeding depression in castor bean (Ricinus communis L.) progenies.
OLIVEIRA, I. J. de; ZANOTTO, M. D.; KRIEGER, M.; VENCOVSKY, R.The purpose of this study was to investigate inbreeding depression (DE) in castor bean. From a population derived from the Guarani cultivar, 60 mother plants were sampled. Three types of progenies were obtained from each one: from self-pollination (AU), from crosses (CR) and from open pollination (PL). Grain yield of the progenies was evaluated in two locations. There was a strong interaction of progenies x loc...
Population structures of Brazilian tall coconut ( Cocos nuciferaL.) by microsat...
RIBEIRO, F. E.; BAUDOUIN, L.; LEBRUN, P.; CHAVES, L. J.; BRONDANI, C.; ZUCCHI, M. I.; VENCOVSKY, R.In this study we investigated the genetic diversity of 10 populations of Brazilian Tall coconut trees, employing 13 SSR loci to characterize their genetic variability, population structure, and reproductive system.; Made available in DSpace on 2011-04-09T14:45:23Z (GMT). No. of bitstreams: 1 20093561.pdf: 128802 bytes, checksum: 63bebad9c6c14b48f753c0213bfa4e76 (MD5) Previous issue date: 2011-01-26
Genetics and expected selection gain for growth traits in Eugenia dysenterica D...
AGUIAR, A. V. de; VENCOVSKY, R.; CHAVES, L. J.; MOURA, M. F.; MORAIS, L. K. deThe objective of this study was to estimate genetic parameters of quantitative traits in a living germplasm collection of Eugenia dysenterica. The genetic material consisted of 110 progenies derived from 10 natural Eugenia dysenterica subpopulations sampled in the southeastern region of the state of Goiás. The experiment was established in a complete randomized block design, with 110 treatments, four replicatio...
Proposal for applying combined selection to diallel analysis.
PACHECO, C. A. P.; FERRAO, M. A. G.; CRUZ, C. D.; VENCOVSKY, R.The phylosophy of intrapopulation combined selection is the search for and identification of individuals with superior genotypic behavior, based on their performance compared to the family mean and, at the same time, of their family mean in relation to the population mean, through the weighting of the phenotypic values represented, respectively, by the within and among families heritability coeficient. The obje...