Karyomorphology of Rhoiptelea (Rhoipteleaceae)

Karyomorphology of Rhoiptelea chiliantha, the only species of Rhoipteleaceae, was studied for the first time. Rhoiptelea has the simple chromocenter type at interphase and 2n=32. Of the 32 chromosomes at metaphase, the first and the second longest pair of chromosomes have a secondary constriction at...

Full description

Saved in:
Bibliographic Details
Published inActa Phytotaxonomica et Geobotanica Vol. 46; no. 2; pp. 147 - 151
Main Authors OGINUMA, KAZUO, GU, ZHIJIAN, YUE, ZONG-SHU
Format Journal Article
LanguageJapanese
Published Japanese Society for Plant Systematics 01.12.1995
Subjects
chromosome
Juglandales
karyomorphology
Rhoiptelea
Rhoipteleaceae
Online AccessGet full text

Cover

More Information
Summary:Karyomorphology of Rhoiptelea chiliantha, the only species of Rhoipteleaceae, was studied for the first time. Rhoiptelea has the simple chromocenter type at interphase and 2n=32. Of the 32 chromosomes at metaphase, the first and the second longest pair of chromosomes have a secondary constriction at median-submedian position ; eight pairs have centromeres at median position, three pairs at median-submedian position, and three pairs at subterminal position. Despite its clear distinctness, Rhoiptelea best resembles Juglandaceae karyomorphologically within the higher Hamamelididae. Like Juglandaceae, Rhoiptelea have x=16 and the secondary constriction in two pairs of the longest chromosomes. It is further discussed that Juglandales (Juglandaceae and Rhoipteleaceae) (x=16) are probably of tetraploid origin from a common ancestor with Myricaceae (with x=8)
ISSN:0001-6799
2189-7050
DOI:10.18942/bunruichiri.KJ00001079097