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本文研究了棉属海岛棉［ＧｏｓｓｙｐｉｕｍｂａｒｂａｄｅｎｓｅＬ．，（ＡＤ）２］ｘ拟似棉［Ｇ．ｇｏｓｓｙｐｉｏｉｄｅｓ（Ｕ１ｂｒ）Ｓｔａｎｄｌｅｙ，Ｄ６］Ｆ_１植株的减数分裂及不育花粉的形成过程。Ｆ_１花粉母细胞在减数分裂中期Ｉ平均染色体构型为２４．８６Ⅰ＋６．９８Ⅱ＋０．０５Ⅲ。Ｆ_１不育的根本原因在于减数分裂中期染色体不能正常配对，引起部分染色体滞后及染色体不均等分配，从而产生多分孢子和微核，最终导致不育花粉的产生，并讨论Ｄ６与（ＡＤ）２间的亲缘关系以及克服Ｆ_１不育的方法。
In this paper, cotton island cotton island [GossypiumbarbadenseL. , (AD) 2] x pseudo cotton [G. gossypioides (U1br) Standley, D6] F_1 plant meiosis and the formation of sterile pollen. The average chromosome configuration of F_1 pollen mother cells in metaphase I was 24.86Ⅰ + 6.98Ⅱ + 0.05Ⅲ. The basic reason for F_1 infertility is that metaphase chromosomes can not be paired normally, resulting in partial chromosomal lagging and chromosomal uneven distribution, resulting in multiple sporozoites and micronuclei that eventually lead to the generation of sterile pollen. D6 and (AD) 2 Kinship and ways to overcome F_1 infertility.