ph基因突变系品种间杂交后代在减数分裂时期表现异常,PMC（I）期常出现较多的单价体、棒形二价体和多价体,在后期和末期出现落后染色体、染色体片断和激核。由于染色体联会紊乱,造成一些非同源染色体配对与交换,出现在正常品种间杂交情况下所不常出现的基因易位与重组。 The phenotypes of the ph gene mutation lines showed abnormalities at the stage of meiosis during the hybridization. PMC (I) often showed more monovalent, rod-shaped, bivalent and multivalent bodies, with late chromosomes and chromosomal segments in the late and late stages Excited nuclear. As the chromosome association disorder, resulting in a number of non-homologous chromosome pairing and exchange, appeared in the case of normal cross between the case of gene translocation and recombination.