Ricci G L, Silva N, Pagliarini M S, Scapim C A
Departamento de Biologia Celular e Genética, Universidade Estadual de Maringá, Maringá, PR, Brasil.
Genet Mol Res. 2007 Mar 27;6(1):137-43.
Cytological analysis of microsporogenesis in 72 popcorn plants, comprising nine from the original population (CMS-43, S(0)) and 63 from seven cycles of self-fertilization (S(1) to S(7)), one plant of S(0) generation (plant 2) was identified with B chromosomes. The number of B chromosomes varied from two to three in the same anther. The pattern of chromosome pairing and meiotic behavior of Bs were similar to those found in other plant species. The presence of B chromosomes did not affect chiasma frequency and chiasma distribution in A chromosomes. This is the first report of B chromosomes in popcorn.
对72株爆米花植株的小孢子发生进行了细胞学分析，其中包括来自原始群体的9株（CMS - 43，S(0)）和来自7个自交世代（S(1)至S(7)）的63株。在S(0)代的一株植株（植株2）中鉴定出了B染色体。在同一个花药中，B染色体的数量从两条到三条不等。B染色体的染色体配对模式和减数分裂行为与其他植物物种中的相似。B染色体的存在并不影响A染色体的交叉频率和交叉分布。这是爆米花中B染色体的首次报道。
