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研究了新麦草的细胞学核型特性,研究结果表明供试的新麦草种质资源染色体数目14条,第7号染色体上有1对随体,臂比值大于2的染色体仅有1对为14%,核型公式为2n=2x=14=12m(2SAT)+2sm,核型不对称类型属于2A型。本研究结果为新麦草的种质资源遗传变异及新品种的选育等提供了科学的依据。
The cytological karyotype of New Wheatgrass was studied. The results showed that the number of new Wheatgrass germplasm resources was 14, the number of chromosomes on chromosome 7 was 1, and that of the chromosomes whose arm ratio was more than 2 was only 14 %, The karyotype formula is 2n = 2x = 14 = 12m (2SAT) + 2sm, and the karyotype is 2A type. The results of this study provide a scientific basis for genetic variation of New Wheat germplasm resources and selection of new varieties.