中国科学家在杂种F1克隆繁殖研究领域取得突破性进展

杂种优势在提高作物产量和适应性方面已得到广泛应用。然而, 由于杂交种后代不能稳定遗传, 每年均需利用不育系和恢复系亲本配置杂交种子, 不仅制种成本高, 而且存在制种纯度问题, 限制了杂种优势利用的推广范围。近期, 中国科学家通过对减数分裂和受精过程关键基因进行编辑, 获得了杂种F₁的克隆种子, 为进一步固定杂种优势、实现“一系法”水稻杂种优势利用带来了曙光。

Chinese Scientists Make Groundbreaking Discoveries in Clonal Propagation of F1 Hybrids

Heterosis has been widely applied to improve the productivity and adaptability of crops. However, progeny of hybrid exhibits segregation, hybrid seed need to be produced using male sterile and restorer lines each year. Hybrid seed production is prohibitively expensive and the purity of hybrid seed is uncertain, that limit the extension of its large adoption. Recently, Chinese scientists obtained clonal F₁ seeds from hybrid rice by genome editing of some meiosis and fertilization related genes. Their work shed light on utilization and fixation of the heterosis by ‘one line’ method.