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过去已有一些人研究过三叶橡胶属的染色休,除霍伊塞(Heusser,1919)及本罕(Bang-ham,1931)外,均认为三叶橡胶属的休染色体数为2n=36。在制片方法上,除博耳德温(Ba-ldwin,1947)及罗斯(Ross,1959)外,均采用石腊制片法。但此法难在同一平面上看到所有的染色休,计数不易准确,故试图用简易的根尖压碎法以取得可以数出染色休的中期板制片。拉莫尔(Ramaer,1935)认为某些巴西橡胶无性系的部份或完全雄性不育,与花粉母细胞的减数分裂不正常有关。为了寻找适于育种上
In the past, some people have studied the dyeing off of the genus Trifolium, with the exception of Heusser (1919) and Ben-ham (1931) that the resting chromosome number of the genus Trifolium is 2n = 36 . In the production methods, in addition to Bourdwin (Ba-ldwin, 1947) and Rose (Ross, 1959), the use of paraffin preparation method. However, this method is difficult to see in the same plane all the dye off, the count is not easy to accurate, so I tried to use simple apex crush to get the dye can be counted out of the mid-plate production. Ramaer (1935) argues that some or all of male sterility in some rubbery clones in Brazil is associated with abnormal meiosis of pollen mother cells. In order to find suitable for breeding