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Molecular and morphological differentiation between the crop and weedy types in velvetleaf (Abutilon theophrasti Medik.) Using a chloroplast DNA marker: Seed source of the present invasive velvetleaf in Japan

Article Abstract:

A comparison of chloroplast DNA (cpDNA) sequences was carried out between the crop and weed types of Abutilon theophrasti to clarify the seed source of the present weedy velvetleaf in Japan. Three nucleotide substitutions, one six-base-pair insertion/deletion (indel) and one 30-base pair inversion was detected by a sequencing analysis of approximately 6 percent of the chloroplast genome.

Author: Yoshimura, Y., Kurokawa, S., Shibaike, H., Akiyama, H.
Publisher: Blackwell Publishers Ltd.
Publication Name: Heredity
Subject: Biological sciences
ISSN: 0018-067X
Year: 2004
Japan, Comparative analysis, Extrachromosomal DNA, Pareira

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RNAi: A defensive RNA-silencing against viruses and transposable elements

Article Abstract:

RNA silencing is a form of nucleic-acid-based immunity, targeting viruses and genomic repeated sequences. RNAi acts as sequence-specific silencing mechanism which provides an ancestral cellular defence present in a wide range of organism from plants to human and which is required to inactivate exogenous viruses or genes present in multiple copies within the genome.

Author: Vaury, C., Buchon, N.
Publisher: Blackwell Publishers Ltd.
Publication Name: Heredity
Subject: Biological sciences
ISSN: 0018-067X
Year: 2006
Genetic research, Gene silencing, RNA interference

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The origin and evolution of geminivirus-related DNA sequences in Nicotiana

Article Abstract:

Relative rates of synonymous and nonsynonymous nucleotide substitutions were used to test the evidence of selection on GRD units and none were found within the GRD3 and GRD5 families. There is recurrent dynamics interplay between geminivirus and plant DNA in evolution.

Author: Murad, L; Bielawski, JP, Matyasek, R.; Kovarik, A., Nichols, RA, Leitch, AR, Lichtenstein, CP
Publisher: Blackwell Publishers Ltd.
Publication Name: Heredity
Subject: Biological sciences
ISSN: 0018-067X
Year: 2004
Nicotiana, DNA replication

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Subjects list: Research, Genetic aspects, Nucleotide sequence, Base sequence
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