Identification of Haynaldia villosa chromosomes added to wheat using a sequential C-banding and genomic in situ hybridization technique
文献类型： 外文期刊
作者： Zhong, SB 1 ; Zhang, DY 1 ; Li, HB 1 ; Yao, JX 1 ;
作者机构： 1.JIANGSU ACAD AGR SCI,INST AGROBIOL GENET & PHYSIOL,NANJING 210014,PEOPLES R CHINA
关键词： Haynaldia villosa; Triticum aestivum; C-banding; genomic in situ hybridization; alien chromosome addition
期刊名称：THEORETICAL AND APPLIED GENETICS （ 影响因子：5.699； 五年影响因子：5.565 ）
ISSN： 0040-5752
年卷期： 1996 年 92 卷 1 期
页码：
收录情况： SCI
摘要： Genomic in situ hybridization (GISH) offers a convenient and effective method for cytological detection, but can not determine the identity of the chromosomes involved. We integrated C-banding with GISH to identify Haynaldia villosa chromosomes in a wheat background. All chromosomes of H. villosa showed C-bands, either in telomeric regions or in both telomeric and centromeric regions, which allowed unequivocal identification of each H. villosa chromosome. The seven pairs of H. villosa chromosomes were differentiated as 1-7 according to their characteristic C-bands. Using a sequential C-banding and GISH technique, we have analyzed somatic cells of F-3 plants from the amphiploid Triticum aestivum-H. villosa x 'Yangmai 158' hybrids. Three plants (94009/5-4, 94009/5-8 and 94009/5-9) were shown to contain H. villosa chromosome(s). 94009/5-4 (2n = 45) had three H. villosa chromosomes (2, 3 and 4); 94009/5-8 (2n = 45) possessed one chromosome 4 and a pair of chromosome 5, and 94009/5-9 (2n = 43) was found to have one chromosome 6 of H. villosa. The combination of GISH with C-banding described here provides a direct comparison of the cytological and molecular landmarks. Such a technique is particularly useful for identifying and localizing alien chromatin and DNA sequences in plants.
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