五个中国荞麦(Fagopyrum)种的核型分析

摘要

The karyotypes of F. esculentum,F. tataricum,F. megaspartanium,F.pilus and F. zuogongense were studied by means of the cytological observation of stem-tips. The results indicated that the five species are similar in karyotype. They all have two pairs of satellite chromosomes and symmetric karyotypes. The karyotype formulas of F. esculentum,F. tataricum,F. megaspartanium,F. pilus and F. zuogongense are 12m+4m(SAT),12m+4sm(SAT),8m+4sm+4m(SAT),12m+2m(SAT)+2sm(SAT) and 24m+4sm+4m(SAT),respectively.%用去壁低渗法对甜荞(Fagopyrum esculentum)、苦荞(F. tataricum)、左贡野荞（F. zuogongense Q. F. Chen）,大野荞（F. megaspartanium Q. F. Chen）及毛野荞（F. pilus Q. F. Chen）等大粒组荞麦种的根尖和茎尖有丝分裂染色体进行了观察，并对其茎尖有丝分裂染色体的核型进行了比较分析。结果表明：这5种荞麦在核型上类似，都有2对随体染色体，而且都为对称核型。但它们彼此有一定的差异。甜荞、苦荞、大野荞、毛野荞及左贡野荞的核型公式分别为12m+4m(SAT)、12m+4sm(SAT)、8m+4sm+4m(SAT)、12m+2m(SAT)+2sm(SAT)及24m+4sm+4m(SAT)。