chinese spring and its aneuploids for the a genome chromosomes ( ditelo-1a ( l ) , -2a ( s ) , -3a ( alpha ) , -4a ( alpha ) , -5a ( l ) , -6a ( alpha ) , -7a ( s ) , nulli-1a , -2a , -4a and mono-4a ) to determine the genetic role of individual chromosomes or chromosome arms in callus formation .
C0008633
chromosomes
C0449721
chromosome