Consulta: subjectFacets:"Vernalization"
Registros recuperados: 5
Data/hora: 16/06/2024 06:21:11

Allelic variation at the Vrn-A1, Vrn-B1, Vrn-D1, Vrn-B3 and Ppd-D1a loci of Pakistani spring wheat cultivars
Provedor de dados: 69
Autores: Iqbal,Muhammad; Shahzad,Armghan; Ahmed,Iftikhar.
Flowering time in bread wheat (Triticum aestivum L.) is controlled by vernalization and photoperiod response, and earliness per se genes. The genetic basis of flowering time has not been investigated in Pakistani bread wheat. This study was, therefore, conducted to determine the allelic composition at Vrn-A1, Vrn-B1, Vrn-D1, Vrn-B3 and Ppd-D1a loci of 59 Pakistani spring bread wheat cultivars. These cultivars, along with 4 isogenic lines for vernalization genes were characterized with previously reported DNA markers designed for detecting allelic variation at 4 Vrn (Vernalization) and 1 Ppd (Photoperiod) loci. Spring habit Vrn-A1a allele was found in 36% cultivars either alone or with spring habit Vrn-B1 and Vrn-D1 alleles. Two wheat cultivars had the...
Tipo: Journal article
Palavras-chave: Photoperiod; Spring growth habit; Triticum aestivum; Vernalization.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582011000100001

Mutagenesis in Lupinus polyphyllus a tool for producing spring variants?
Provedor de dados: 46
Autores: Fatta,N.; Mascarini,A; Lopez,S.
Lupinus polyphyllus remains vegetative during the first year, stores cold during winter and is induced to blossoming in the second year. Inflorescences are attractive and varied coloured terminal clusters. In Buenos Aires the historical average winter temperature is 11.5 ºC and the number of hours of cold are not enough for L. polyphyllus to flower so there is no commercial offer in pots. The line of work chosen to produce genetic variability in L. polyphyllus, was induced mutagenesis with the purpose of rescuing genetic variants that meet the required cold naturally in Buenos Aires and capable of flowering and producing viable seeds. Seeds harvested in Bariloche were sown on september 4, 2003. 600 seedlings received gamma radiation at a rate of 50 Gy and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Vernalization; Qualitative character; Gamma radiation; Plant variety.
Ano: 2008
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1852-62332008000200002

A Digitalis purpurea elite population starting from a population grown wild
Provedor de dados: 46
Autores: Papone,Mirta; Mascarini,Alba; Fatta,Nora.
D.purpurea is grown in cold areas with long days. In the Buenos Aires province market it is absent, probably because it is a complicated and expensive crop. The horticultural growers prefer the imported costly hybrid seed because plants flower without suplementary light or cold. The objectives of the experiments which were laid out were to find, among the individuals of a population grown wild, genotypes that responded to the Buenos Aires conditions, producing plants induced in pots and assesing if there was response to natural aggregates. Seed harvested in Bariloche was sown on the 29/05/o4. The plants were transplanted to 3 liter pots. 30 pots were placed in greenhouse and treated with chemical fertilization. 54 pots were placed outdoors in the sun and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Photoperiod; Vernalization; Natural fertilizer; Seed.
Ano: 2008
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1852-62332008000100004

Analysis of VRN1 gene in triticale and common wheat genetic background
Provedor de dados: 63
Autores: Nowak,Michał; Leśniowska-Nowak,Justyna; Zapalska,Magdalena; Banaszak,Zofia; Kondracka,Katarzyna; Dudziak,Karolina; Kowalczyk,Krzysztof.
In cereals, the transition from the vegetative stage to flowering is controlled in the main by the set of vernalization genes. Within these genes the most important role is played by VRN1, which encodes a MADS-box transcription factor, regulating the transition of shoot apical meristem to the reproductive phase. The level of vernalization requirement is strongly linked to the molecular structure of this gene. In this study we analyzed molecular mechanisms regulating the vernalization requirement in triticale on the basis of comparative analysis of the VRN1 locus between triticale (×Triticosecale Witt.) and common wheat (Triticum aestivum L.) genotypes. We also estimated the influence of VRN genotype on heading time and the winter hardiness of these two...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: ×Triticosecale Witt.; Triticum aestivum L.; Vernalization; VERNALIZATION 1 gene; Heading time.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162014000500006

Identifying Eucalyptus expressed sequence tags related to Arabidopsis flowering-time pathway genes
Provedor de dados: 61
Autores: Dornelas,Marcelo Carnier; Rodriguez,Adriana Pinheiro Martinelli.
Flowering initiation depends on the balanced expression of a complex network of genes that is regulated by both endogenous and environmental factors. The timing of the initiation of flowering is crucial for the reproductive success of plants; therefore, they have developed conserved molecular mechanisms to integrate both environmental and endogenous cues to regulate flowering time precisely. Extensive advances in plant biology are possible now that the complete genome sequences of flowering plants is available and plant genomes can be comprehensively compared. Thus, association studies are emerging as powerful tools for the functional identification of genes involved on the regulation of flowering pathways. In this paper we report the results of our search...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: CONSTANS; Data mining; EST; Photoperiod; Vernalization.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202005000200009