5Esen A, Soost R K. Unexpected triploids in citrus: their origin,identification, and possible use. J Heredity, 1971,62:329~333.
6Sergio F D B, Nicasio T, Clara C. Microsporogenesis in a citrus interspecific tetraploid somatle hybrid and its fusion parents. Heredity, 1999,83:373~377.
2Z. Li,H. L. Liu,P. Luo. Production and cytogenetics of intergeneric hybrids between Brassica napus and Orychophragmus violaceus[J] 1995,Theoretical and Applied Genetics(1):131～136
