摘要： 在水稻细胞遗传研究中, 对于染色体编号有着较多的争议,这在几条长度较短的染色体上显得尤为突出。为有比较地研究这几条染色体在水稻染色体组中的正确编号,本研究以涉及两条较短染色体相互易位的易位杂合体RT9-12为材料,分析了易位系与普通品种日本晴减数分裂粗线期染色体的形态特征。结果表明,该易位系的易位染色体并非第9和第12染色体,而是第10和第11染色体,从而认为目前国际上统一编号的第9、12染色体,根据染色体的实际长度可能分别为第10、11染色体。
Abstract:Rice chromosomes in mitosis are usually too small to be identified clearly one from others.In recent years,pachytene chromosomes in meiosis have been in vestigated intensively for establishing unified numbering system.However,divergence in numbering system is still existing especially for some short chromosomes such as chromosome 9 and 12.In order to verify these chromosomes,a translocation line RT9-12 and a japonica variety Nipponbare were carefully investigated for all the chromosomes morphologically in late pachytene stage.It was found that the chromosomes involved in translocation were chromosome 10 and 11 in stead of chromosome 9 and 12 as being compared with the karyotype of Nipponbare.So we consider that the chromosome 9 and 12 in the present rice chromosome numbering system could be chromosome 10 and 11 according to their length,arm ratio and the relationship with nucleolus.
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