Genetics Division, Indian Agricultural Research Institute, Delhi, India.
Theor Appl Genet. 1970 Jan;40(1):26-31. doi: 10.1007/BF00280983.
Detailed microsporogenesis in 4 species of the genus Pennisetum namely P. typhoides (n = 7), P. longistylum (n = 18), P. polystachyon (n = 27) and P. pedicellatum (n = 27) was studied. Nature of chromosome pairing was critically studied and pairing was regular in diploid and allotetraploid species. Some multivalents formation occurred in segmental allopolyploids. They displayed numerous meiotic irregularities. Aberrant meiosis in the material is evaluated. The role of apomixis, hybridization and polyploidy in the evolution of the genus is discussed.
详细的花粉发生在 4 种雀稗属植物中，即黍（n = 7）、长序雀稗（n = 18）、多穗雀稗（n = 27）和纤毛雀稗（n = 27）。研究了染色体配对的性质，在二倍体和异源四倍体物种中配对是规则的。在部分片段异源多倍体中形成了一些单价体。它们表现出许多减数分裂不规则。评估了材料中异常减数分裂的情况。讨论了无融合生殖、杂交和多倍体在属的进化中的作用。
