论文部分内容阅读
以隐性亲本(芽黄 v_1,v_6,v_8,v_(10),v_(11),T582,TM-1)作母本,授以辐射处理的显性亲本(TM-1,2256-61,陕1155,泗棉2号,Rd,T586)的花粉,进行单体的诱发研究。通过对 F_1表型为隐性或畸形的植株,在现蕾时观察其减数分裂时的染色体构型,发现有单倍体的存在。并将单体作母本,用相应的易位系测验,鉴定了诱发得到的单体株分别为单体1、6、7。辐射剂量为800伦琴和500伦琴,其诱致单体的频率分列为20.5%和9.8%。发现高剂量比低剂量更能诱致染色体的丢失,特别是小染色体的丢失,并且高剂量诱致的染色体结构变异也增加。
The dominant parents (TM-1,2256-61, TM-1) treated with recessive parents (buds v_1, v_6, v_8, v_10, v_11, Shan 1155, Simian 2, Rd, T586) pollen, monomer induction studies. Through the recessive or abnormal F_1 phenotype plants observed at the time of their meiosis chromosome configuration, and found the presence of haploid. Monosomyces was used as the female parent and tested with the corresponding translocation line. The induced monomeric strains were identified as monomers 1, 6 and 7, respectively. Radiation doses of 800 Roentgen and 500 Roentgen, which caused the frequencies of the haplotypes to be 20.5% and 9.8%, respectively. It was found that high dose induced more chromosome loss than low dose, especially the loss of small chromosomes, and the high dose induced chromosome structure variation also increased.