Karyotype Analysis of Three Species of Ceratoides (Chenopodiaceae)

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Karyotype Analysis of Three Species of Ceratoides (Chenopodiaceae)

Kurban·Nizamidin

(Xinjiang August-1 Agricultural College, Ürümqi)

Received:1900-01-01 Revised:1900-01-01 Online:1984-12-18 Published:1984-12-18
Contact: Kurban·Nizamidin

Abstract

Abstract:

The karyotypes of 3 species of Ceratoides (C. arborescens, C. ewersman-

niana and C. latens) were studied. The results show that C. arborescens is a diploid,

with karyotype formula 2n=2x=18=16m+2sm, C. ewersmanniana is also a diploid, with

2n=2x=18=14m+4sm, while C. latens is a tetraploid, with 2n=4x=36=24m+12sm. Ac-

cording to the karyotypes, the morphological features and geographical distribution, C.

arborescens seems to be a primitive species and it might have originated in northern

China. C. arborescens and C. ewersmanniana are similar to each other, not only in mor-

phology but also in karyotype, which shows that they are closely related and that C. ar-

borescens might be the progenitor of C. ewersmanniana. The karyotypes of the 3 species

of Ceratoides are basically identical, with only minor differences.

Key words: Ceratoides, C.latens, C.ewersmanniana, C.arborescens, Karyotype

Kurban·Nizamidin. Karyotype Analysis of Three Species of Ceratoides (Chenopodiaceae)[J]. .

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Karyotype Analysis of Three Species of Ceratoides (Chenopodiaceae)

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