籼稻和粳稻是普通栽培稻最主要的两个亚种,遗传育种工作者一向把籼粳之间的有性杂交划归远缘杂交的范畴。远缘杂交相对于近缘杂交来说,最突出的特点是杂交的不亲和性和杂种的不孕代,即所谓“生殖隔离现象”。然而,生殖隔离不是绝对的,是可以打破 Indica and japonica rice are the two main subspecies of common cultivated rice. Genetic breeding workers have always classified sexual cross between indica and japonica as distant hybridization. The most prominent feature of distant hybridization relative to relative hybridization is hybrid incompatibility and hybrid infertility generation, so-called “reproductive isolation phenomenon.” However, genital isolation is not absolute and can be broken