Studies of Cytogenetic and Traits Characteristics on the Offsprings between Elytrigia intermedium and Triticum
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)
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.
【CateGory Index】： S512.103