Chromosome banding in the genusPinus

Hizume, Masahiro; Arai, Motonobu; Tanaka, Akio

doi:10.1007/bf02489619

Cited by 27 publications

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Karyotype evolution in conifers

Ohri

2021

Feddes Repertorium

View full text Add to dashboard Cite

The present study describes the published karyotypes of 338 conifer taxa comprising of 302 species belonging to 59 genera of conifers. The somatic chromosome numbers range from 2n=18 in Phyllocladus (Podocarpaceae) to 2n=66 in Sequoia sempervirens (Cupressaceae). Polyploidy is rare as out of 512 conifer taxa known cytologically 2.80 per cent are polyploid and 2.20 per cent have both diploid and polyploid cytotypes. Various families show uniform somatic numbers such as Pinaceae (2n=24), Araucariaceae (2n=26), Cupressaceae (2n=22) except for some cases of polyploid taxa, and Podocarpaceae (2n=18-38) caused by centric fissions. In Pinaceae the genus Pinus has the most symmetrical karyotype and Larix has the maximum bimodality. The karyotype diversity in rest of the families has been discussed in the phylogenetic framework. This apparent uniformity of karyotypes is not reflected in diversity of fluorescent bands and rDNA loci. These additional markers have taxonomic relevance and also facilitate chromosome identification in a number of cases. This karyotype conservation is reflected in very weak interspecific crossing barriers with the hybrids showing normal meiosis, and also in the conservation of gene content and order.

show abstract

Karyotype evolution in conifers

Ohri

2021

Feddes Repertorium

View full text Add to dashboard Cite

show abstract

Molecular Cytogenetics (Fluorescence In Situ Hybridization - FISH and Fluorochrome Banding): Resolving Species Relationships and Genome Organization

Siljak‐Yakovlev

Pustahija

Vičić-Bočkor

et al. 2020

Methods in Molecular Biology

View full text Add to dashboard Cite

Molecular Cytogenetics (FISH and Fluorochrome Banding): Resolving Species Relationships and Genome Organization

Siljak‐Yakovlev

Pustahija

Vičić

et al. 2013

Methods in Molecular Biology

View full text Add to dashboard Cite

Fluorochrome banding (chromomycin, Hoechst, and DAPI) and fluorescence in situ hybridization (FISH) are excellent molecular cytogenetic tools providing various possibilities in the study of chromosomal evolution and genome organization. The constitutive heterochromatin and rRNA genes are the most widely used FISH markers. The rDNA is organized into two distinct gene families (18S-5.8S-26S and 5S) whose number and location vary within the complex of closely related species. Therefore, they are widely used as chromosomal landmarks to provide valuable evidence concerning genome evolution at chromosomal levels.

show abstract

Chromosome banding in the genusPinus

Cited by 27 publications

References 2 publications

Karyotype evolution in conifers

Karyotype evolution in conifers

Molecular Cytogenetics (Fluorescence In Situ Hybridization - FISH and Fluorochrome Banding): Resolving Species Relationships and Genome Organization

Molecular Cytogenetics (FISH and Fluorochrome Banding): Resolving Species Relationships and Genome Organization

Contact Info

Product

Resources

About