Abstract
SUMMARYDetailed analysis of chromosomes at pachytene and later stages of meiosis were made in the five species of Sorghum belonging to the Sub-genus Eu-sorghum. Pachytene chromosomes are depicted on the basis of total length, relative length, arm ratio, amount and distribution of heterochromatin and number and position of chromomeres. The characteristics of each of the ten chromosomes in the haploid complement are described in detail in different classes bringing out the similarities and differences amongst the five species. Species have been compared inter alia on their total lengths of chromosomes and the differences in lengths both within the species and between them were statistically tested.A remarkable feature noted regarding the asymmetrical chromosome is that in S. vulgare it is the fifth chromosome while in all the other species the asymmetrical one is the sixth, based on length. Comparisons based on chromomeric pattern revealed that the karyotype of each species could be divided into four groups...
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