ON THE DEVELOPMENT OF A NEW SET OF PRIMARY TRISOMIeS IN AN INDIAN MAIZE

Abstract

In the triploid x diploid crosses of maize (Zea mays L.) the plump, semiplump, shrivelled and fluffy kernels had 42.7, 25.5,12.0 and 0'1. survival, respectively. The kernel categories showed difference in chromosome numbervariation pattern. The plump kernels contained 23.4% trisomies, whereas the semiplump and shrivelled kernels contained 10.8% and 3.3'1. trisomies, respectively. Karyotype analysis revealed that any extra chromosome can be transmitted through the female gamete of the triploid and thus it will be possible to identify different primary trisomies from the plump kernels of triploid x diploid crosses or its progeny.