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Wheat Information Service
Number 84: 33-39 (1997)
Research article
C-banding analysis of D-genome chromosome in
Chinese landrace of Triticum tauschii (Coss.) Schmalh. and
Triticum aestivum L cv. Chinese
Spring
Deng-Cai Liu, Chi Yen and Jun-Liang Yang
Triticeae Research Institute of Sichuan Agricultural University,
Dujiangyan City, 611830, Sichuan, China
Summary
The Giemsa C-banding analysis of 11 accessions of T. tauschii
from the middle reaches of the Yellow River and Xinjiang province
in China and common wheat Chinese Spring was made. The clear C-band
polymorphic variation among the T. tauschii accessions from
the middle reaches of the Yellow River and the accessions from
Xinjiang was observed, which is consistent with evidence of RFLPs and
esterase analysis in Chinese T. tauschii. Modification in the
C-banding pattern was noticed on some D-genome chromosomes of Chinese
Spring compared with T. tauschii. The C-banding polymorphic
variation of secondary constriction region in chromosome arm 5DS of
T. tauschii was found.
Key words: Chinese Triticum tauschii, Chinese Spring,
C-banding polymorphism
Introduction
The C-banding technique is a good method for cytological
differentiation of D-genome chromosomes of T. tauschii
and T. aestivum (Gill et al. 1991; Friebe et al. 1992;
Hohmann and Lagudah 1993). A large amount of C-banding polymorphism
among different T. tauschii accessions from the Middle East
has been found, and several chromosomes of them are involed in the
modification of the C-banding pattern in comparison with that of
D-genome chromosomes of Chinese Spring. In this paper, C-banding
analysis of D-genome chromosome in Chinese T. tauschii and
common wheat Chinese Spring was made.
Materials and methods
The materials analyzed consist of 11 different T.
tauschii accessions from the middle reaches of the Yellow
River (including Henan and Shannxi provinces) and Xinjiang province
as well as commmon wheat Chinese Spring, and their origins are given
in Table 1. The C-banding karyotypes were
made using the technique described by Ren and Zhang (1995).
Chromosome identification and designation of D-genome chromosomes to
homoeologous group follows the generalized C-banding karyotype of
T. aestivum (Gill et al. 1991) and T. tauschii (Friebe
et al. 1992). The position of C-bands in each chromosome arm was
located relative to C-bands present in hexaploid wheat. The
consistent or inconsistent C-bands of each accession were derived
from 5 to 8 different C-banded chromosomes of each accession.
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