Consulta: creatorFacets:"Turchetto,Caroline"
Registros recuperados: 4
Data/hora: 10/06/2024 13:40:50

Assessment of genetic diversity in Brazilian barley using SSR markers
Provedor de dados: 74
Autores: Ferreira,Jéssica Rosset; Pereira,Jorge Fernando; Turchetto,Caroline; Minella,Euclydes; Consoli,Luciano; Delatorre,Carla Andréa.
Abstract Barley is a major cereal grown widely and used in several food products, beverage production and animal fodder. Genetic diversity is a key component in breeding programs. We have analyzed the genetic diversity of barley accessions using microsatellite markers. The accessions were composed of wild and domesticated barley representing genotypes from six countries and three breeding programs in Brazil. A total of 280 alleles were detected, 36 unique to Brazilian barley. The marker Bmag120 showed the greatest polymorphism information content (PIC), with the highest mean value found on chromosome three, and the lowest on chromosomes four and six. The wild accessions presented the highest diversity followed by the foreign genotypes. Genetic analysis was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Domesticated barley; Genetic diversity; Hordeum vulgare ssp. vulgare; Hordeum vulgare ssp. spontaneum; Microsatellite markers.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572016000100086

Morphological and genetic perspectives of hybridization in two contact zones of closely related species of Petunia (Solanaceae) in southern Brazil
Provedor de dados: 39
Autores: Teixeira,Marcelo C.; Turchetto,Caroline; Hartke,Sara; Schnitzler,Carolina K.; Freitas,Loreta B.
ABSTRACT Interspecific hybridization has several consequences for parental species, from blurring species limits to the emergence of new taxa. Petunia axillaris and P. exserta occur in sympatry in southernmost Brazil and naturally hybridize despite their different pollination syndromes and habitat requirements. We employed genetic and morphological analyses to characterize two contact zones between the species with the aim of determining the effect of interspecific hybridization. Microsatellite loci and a morphometric evaluation of the corolla shape were used to classify individuals based on their origin as pure parental or hybrids. Corolla color was used to classify individuals a priori (white, red or intermediate, for P. axillaris, P. exserta or hybrid,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Genetic diversity; Hybridization; Introgression; Morphometric analysis; Petunia.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062019000400734

Species boundary and extensive hybridization and introgression in Petunia
Provedor de dados: 39
Autores: Turchetto,Caroline; Schnitzler,Carolina K.; Freitas,Loreta B.
ABSTRACT Studying the role of hybridization in the speciation of plants is one of the most thrilling areas of evolutionary biology. Hybridization in natural populations can act in opposition to divergence, contribute to adaptation through introgression or foster the emergence of new lineages via hybrid speciation. Species of the plant genus Petunia grow in open areas in southern South America. Some natural interspecific hybrid events have been described for the genus, such as between the endemic P. exserta and the widespread P. axillaris. Both species occur in sympatry in Serra do Sudeste (Brazil), where they occur in diverse habitats and exhibit floral divergence, which has been related to the attraction of different primary pollinators. The present study...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gene exchange; Hybridization; Inbreeding; Introgression; Microsatellite; Petunia; Species limits.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062019000400724

Can the reproductive system of a rare and narrowly endemic plant species explain its high genetic diversity?
Provedor de dados: 39
Autores: Rodrigues,Daniele M.; Turchetto,Caroline; Callegari-Jacques,Sidia M.; Freitas,Loreta B.
ABSTRACT The reproductive system of flowering plants can be highly variable, affecting their biology, gene flow and genetic variability among populations. Petunia secreta is a rare annual endemic species of Pedra do Segredo, located in the municipality of Caçapava do Sul, state of Rio Grande do Sul, Brazil. Although rare, the species possesses a high level of genetic variability. We investigated the reproductive system of P. secreta, including fruit production and seed germinability, in order to determine if its reproductive system can explain its genetic diversity. We sampled five populations and conducted five greenhouse hand-pollination treatments: 1) autonomous apomixis; 2) self-pollination; 3) hand self-pollination; 4) geitonogamy; and 5)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Endogamy; Pampas; Petunia; Reproductive success; Reproductive system; Seed germinability.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000200180