TAILIEUCHUNG - Polyploidy and apomixis in accessions of Senna rugosa (G.Don) H.S.Irwin & Barneby

Senna rugosa () & Barneby (Leguminosae) is a species from the Brazilian Cerrado commonly used for medicinal purposes. Chromosome variability (n = 14 and 28) described for this species indicates the occurrence of chromosome races and recent polyploidization in its evolution history. | Turkish Journal of Biology Research Article Turk J Biol (2014) 38: 510-515 © TÜBİTAK doi: Polyploidy and apomixis in accessions of Senna rugosa () & Barneby Kátia RESENDE*, Clara PRADO, Lisete DAVIDE, Giovana TORRES Department of Biology, Federal University of Lavras-UFLA, Lavras, Minas Gerais State, Brazil Received: Accepted: Published Online: Printed: Abstract: Senna rugosa () & Barneby (Leguminosae) is a species from the Brazilian Cerrado commonly used for medicinal purposes. Chromosome variability (n = 14 and 28) described for this species indicates the occurrence of chromosome races and recent polyploidization in its evolution history. The aim of this study was to verify the relationship between ploidy level and occurrence of polyembryony in 5 accessions of S. rugosa. Cytogenetic analysis revealed the type of interphasic nuclei, chromosome number and morphology, and nuclear DNA content. Frequency of polyembryony was estimated by germination test. Pollen grain viability was estimated by different techniques. There was variability among the accessions of S. rugosa for interphasic nucleus type (semireticulate and nonreticulate), genome size ( to pg/2C), and polyembryony frequency (from 2 to 4 embryos). Pollen grain viability was to 20%, depending on the technique used. Numeric chromosome variability was found among meristematic cells from each individual (2n = 28 to 2n = 112), with prevalence of 2n = 56. In mitotic metaphases with 2n = 56, all chromosomes were metacentric and of similar size. The data described, combined with previous descriptions of irregularities in chromosome pairing, suggest that S. rugosa is an autopolyploid facultative apomictic species, with interpopulation variability for level of apomixis expression. Key words: Apomixis, DNA content, chromosome number, polyembryony, polyploidy 1. .

• Sinh học
• DNA content
• Chromosome number
• Senna rugosa
• Cytogenetic analysis
• Polyembryony frequency
• BMC Genomics
• Chromocenters’ DNA
• Silico analysis
• Tandem repeats
• BMC Cancer
• Mitochondrial DNA content
• Peripheral blood leukocyte
• Real time PCR
• Glioma risk
• Longissimus dorsi muscle
• Intramuscular fat content
• DNA methylome
• Multiple genes
• DNA C value
• Flow cytometry
• Nuclear DNA amount
• Intraspecific variation
• Nuclear genome size
• Cell free DNA
• Cell free tumour DNA
• Somatic mutations
• Mutational signatures
• 2C DNA content
• Endemic species
• Nuclear DNA content
• Plant Biology
• Seed N content
• Agricultural production
• External nitrogen stress
• Total plant nitrogen content
• BMC Pharmacology and Toxicology
• DNA damage
• In vitro
• Cigarette smoke
• High content screening
• Genome Biology
• Genome assembly
• Protein domains
• Gene content
• DNA methylation
• Caenorhabditis elegans
• Mitochondrial DNA damage
• Mitochondrial dysfunction
• Ultraviolet C radiation
• Early life exposure
• Colorectal cancer
• Mitochondrial DNA
• Copy number
• Quantitative PCR
• Repetitive DNA
• Population structure
• Plant breeding
• Plant genomes
• Liquid biopsy
• Folic acid
• S adenosylmethionine
• Molecular cytogenetic identification
• Wheat–Thinopyrum intermedium introgression line
• Total genomic DNA
• Wheatgrass chromosomes
• ABD genomic DNA
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• biology
• biological research
• applied biology
• modern biology
• biological engineering research
• metazoan systems
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• công trình nghiên cứu lâm nghiệp
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• Mechanisms of Carcinogenesis
• Role of Oxidative Stress
• Inflammation and DNA
• Step Ahead of Cancer
• Epigenetic Paradigm
• Lifestyle Changes
• Vicia sativa
• Nucleotypic effect
• Percent mitotic index
• Stomatal frequency
• Molecular markers
• Lotus species
• Genus Lotus
• Amplified fragment length polymorphism
• Genetic diversity
• Genetic structure
• Genetic relationships
• Waxy gene
• Amylose content
• DNA marker development
• Nucleotide Basic Local Alignment Search Tool
• Sanger method