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Position: Home > Articles > Studies of Cytogenetic and Traits Characteristics on the Offsprings between Elytrigia intermedium and Triticum Acta Agronomica Sinica 1999,25 (3) 373-380+402

中间偃麦草与小麦杂交后代的细胞遗传学及性状特点的研究

作者：

王洪刚;孔令让;李平路;亓增军;刘树兵;孔凡晶;朱军

单位：

山东农业大学农学系;浙江农业大学农学系

关键词：

中间偃麦草;小麦;杂交;性状;细胞遗传学

摘要：

中间偃麦草作父本与小麦品种烟农15杂交,杂交结实率为71.72%,杂种F_1在套袋自交和开放授粉条件下的自交结实率分别为32.05%和69.66%.以7个杂种世代为材料,对其细胞遗传学及性状特点进行研究.结果表明,F_1 PMC MI染色体的联会频率较高,细胞内二价体数目平均为13.73个;F_2和F_3两个自交世代的染色体数目显著多于双亲和F_1的42条;杂种F_1在减数第二分裂后期染色体发生不对称分离,形成了不完全减数配子.回交可较快地削减后代染色体数目,回交次数太多会导致偃麦草染色体较快地丢失,这不利于双亲染色体的重组.不同杂种世代均有不同频率的四价体出现,因此在中间偃麦草与小麦杂交后代中可能存在较为普遍的染色体易位重组.杂种后代性状分离复杂,变异类型丰富.

译名：

Studies of Cytogenetic and Traits Characteristics on the Offsprings between Elytrigia intermedium and Triticum

作者：

Wang Honggang Kong Lingrang Li Pinglu Qi Zengjun Liu Shubing Kong Fan-jing Zhu Jun(Dept. of Agronomy,Agri. Univ. of Shandong, Tai'an, 271018) Dept. of Agronomy, Agri. Univ. of Zhejiang, Hangzhou, 310029)

关键词：

E. intermedium; Triticum ; Hybridization; Trait; Cytogenetics

摘要：

Hybridization was made between E. intermedium as the pollen parent and wheat variety Yannong 15, the frequency of seed setting was 71.72%. When hybrid FI was selfed in bag and open pollination, setting percentages were 32.05% and 69. 66% respectively. Cytogenetic and trait characteristics of the progenies (F1、F2、F3、 BC1、BC2、BC3、BC2F2) produced by hy-bridization、selfing and backcrossing between E. intermedium and Triticum Yannong 15 were studied. The results were as followed: F1 showed high chromosome parring in PMC MI, mean of bivalents was 13. 73. No. of chromosomes of F2 and F3 was much more than 42 of parents and F1. Uncomplete reduced gametes may be produced by asymmetrical separation of chromosome in F1 PMC A Ⅱ . No. of offsprings chromosomes was reduced rapidly by backcrossing, and the chromosomes of E. intermedium were lost fast in the backcross generations. It suggested that many times of backcross was not helpful to the recombination between E. intermedium and Triticum chromosomes. Quadrivalents were observed in different generations, it indicated thatthere may be recombinations produced by chromosomes translocation in different generations between E. intermedium and Triticum. The separation of traits was complex and segregative types was plentiful in the progenies of selfing and backcrossing.

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中间偃麦草与小麦杂交后代的细胞遗传学及性状特点的研究

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