Abstract: Misdivisions and polar distributions of wheat monosomes 5A,5B,and 5D from nine north Chinese cultivars were determined in F_1 plantsfrom crosses between Chinese Spring group 5 monosomics and eachof the Chinese cultivars.The frequencies of anaphases Ⅰ cells with mis-divisions were 14.2% for 5A,9.2% for 5B,and 9.1% for 5D,withsignificant differences among chromosomes,cultivars,and chromosome-cultivar interactions.Chinese Spring 5A in its own background had thehighest misdivision rate(40%).Misdivision rates we...