Consulta: creatorFacets:"Priolli,Regina Helena Geribello"
Registros recuperados: 5
Data/hora: 03/06/2024 01:08:05

The genetic structure and mating system of Acrocomia aculeata (Arecaceae)
Provedor de dados: 74
Autores: Abreu,Aluana Gonçalves; Priolli,Regina Helena Geribello; Azevedo-Filho,Joaquim Adelino; Nucci,Stella Maris; Zucchi,Maria Imaculada; Coelho,Ricardo Marques; Colombo,Carlos Augusto.
Acrocomia aculeata is a perennial, fruit-producing palm tree, native to tropical forests. Its fruits have spurred interest because of their significant potential for use in the cosmetic industry and as feedstock for biofuel. In the present study, the genetic structure and mating system in Acrocomia aculeata were analyzed, using eight nuclear microsatellite loci and samples from São Paulo and Minas Gerais states, Brazil. By means of Bayesian analysis, these populations were clustered into two or three groups. A high multilocus outcrossing rate suggests that outcrosses were predominant, although a certain degree of biparental inbreeding also occurred. Thus, although monoecious and self-compatible, there is every indication that A. aculeata bears a mixed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: SSR; Mating system.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572012000100016

Characterization of Brazilian soybean cultivars using microsatellite markers
Provedor de dados: 74
Autores: Priolli,Regina Helena Geribello; Mendes-Junior,Celso Teixeira; Arantes,Neylson Eustáquio; Contel,Eucleia Primo Betioli.
Microsatellite markers or SSR (Simple Sequence Repeats) have proved to be an excellent tool for cultivar identification, pedigree analysis and the evaluation of genetic distance among organisms. Soybean cultivars have been characterized mainly by morphological and biochemical traits. However, these traits have not been sufficient to characterize the large number of cultivars eligible to receive protection under the Brazilian Cultivar Protection Act. In order to define new soybean cultivar markers, the alleles of twelve SSR loci of 186 Brazilian soybean cultivars were studied by estimating the variation in their size range and their respective frequencies. On average, 5.3 alleles per locus were detected, with a mean genetic diversity of 0.64 ± 0.12. These...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max (L.) Merrill; Simple sequence repeat; Microsatellites; Molecular markers; Soybean elite cultivars.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572002000200012

Genetic structure and a selected core set of brazilian soybean cultivars
Provedor de dados: 74
Autores: Priolli,Regina Helena Geribello; Wysmierski,Philip Traldi; Cunha,Camila Pinto da; Pinheiro,José Baldin; Vello,Natal Antonio.
Soybean is one of the most valuable and profitable oil crop species and a thorough knowledge of the genetic structure of this crop is necessary for developing the best breeding strategies. In this study, a representative collection of soybean cultivars recommended for farming in all Brazilian regions was genotyped using 27 simple sequence repeat (SSR) loci. A total of 130 alleles were detected, with an average allelic number of 4.81 per locus. These alleles determined the core set that best represented this soybean germplasm. The Bayesian analysis revealed the presence of two clusters or subgroups within the whole collection (435 soybean cultivars) and the core set (31 entries). Cultivars of similar origin (ancestral) were clustered into the same groups in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Core collection; Genetic base; Glycine max (L.) Merrill; Bayesian method; SSR markers.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572013000300013

Diversidade genética da soja entre períodos e entre programas de melhoramento no Brasil
Provedor de dados: 86
Autores: Priolli,Regina Helena Geribello; Mendes-Junior,Celso Teixeira; Sousa,Sandra Mara Bispo; Sousa,Neylson Eustáquio Arantes; Contel,Eucleia Primo Betioli.
O objetivo deste trabalho foi detectar os efeitos do melhoramento sobre a diversidade do germoplasma da soja cultivada nas três ultimas décadas, por meio da comparação de seis programas de melhoramento e períodos de lançamento de cultivares, utilizando locos microssatélites. Em relação aos programas de melhoramento, todos os locos apresentaram diferenças significativas em suas distribuições alélicas. Alguns locos eram compostos de alelos exclusivos em alguns programas de melhoramento, enquanto outros foram compostos sempre dos mesmos alelos em maior freqüência para todos os programas. A AMOVA indicou maior porção da variância devido a cultivares dentro de programas e somente 5,3% (p&lt;0,05) devido à diferença entre programas. Quando comparados os...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max; SSR; Germoplasma; Erosão genética.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2004001000004

Genetic diversity among Brazilian soybean cultivars based on SSR loci and pedigree data
Provedor de dados: 52
Autores: Priolli,Regina Helena Geribello; Pinheiro,José Baldin; Zucchi,Maria Imaculada; Bajay,Miklos Maximiliano; Vello,Natal Antonio.
In this study, simple sequence repeats (SSR) loci and pedigree data were used to investigate the genetic relationship in a group of 168 Brazilian soybean cultivars. Eighteen SSR loci produced an average of 5.06 alleles and a mean gene diversity of 0.58 for the cultivars studied. Genetic distance (GD) was determined using the modified Roger's Wright distance, and a final dendrogram was in agreement with the cultivar pedigree. A distance matrix based on the coefficient of parentage scores was also generated for the cultivars, which ranged from 0 to 1, with a mean of 0.18, whereas SSR-based genetic similarity (1- GD) ranged from 0.01 to 0.90, with a mean of 0.25. Mantel's Z test showed that the similarity matrices generated from both the data sets were low,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coefficient of parentage; Glycine max (L.) Merr.; Microsatellite markers.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000300004