Chinese researchers achieve a breakthrough in hybrid rice cloning
新闻台署名 来源：新华社、《黎明报》、《阿拉伯新闻》、阿纳多卢通讯社与《分钟镜报》。由 GSRRA 编辑部翻译并节选。
Chinese researchers have achieved a breakthrough in the cloning of hybrid rice, with the potential to fundamentally transform the conventional paradigm of annual seed production and provide new technological support for global food security.
After years of sustained efforts, a team led by researcher Wang Kejian from the China National Rice Research Institute successfully identified and characterized an endogenous rice gene, which they named “HUAXU.” Their study, published in the journal Vita on Tuesday, shows that the HUAXU gene in the egg cells of hybrid rice can efficiently induce parthenogenesis and produce haploid progeny.
When combined with a cloned gamete strategy, multiple apomictic lines developed by the team achieved cloning efficiencies approaching 100 percent. Under various conditions — including different hybrid rice varieties, across multiple generations, in diverse planting populations, and in large-scale field trials — the cloning efficiency remained consistently above 99 percent, while yields were maintained at normal levels.
This marks the initial realization of the “from 1 to 100” target for the “one-line hybrid rice” system, representing a critical step toward the vision of “sustained propagation through generations.”
Cloning efficiency refers to the percentage of seeds produced through artificially induced apomixis that are genetically identical to the maternal plant. It serves as a key metric for assessing the technical success of fixing heterosis and directly affects seed purity.
Wang said that the currently widely adopted three-line and two-line hybrid rice systems, due to genetic segregation in progeny, cannot preserve hybrid vigor in subsequent generations. As a result, they require annual artificial seed production between male sterile lines and restorer lines.
The core objective of the one-line system is to enable hybrid crops to produce clonal seeds through apomixis, thereby fixing heterosis and enabling “one hybridization, perpetuated through generations.” In theory, this means that a single hybrid seed could be sufficient for continuous utilization, eliminating the need for annual reseeding.
Wang noted that the breakthrough addresses a long-recognized global challenge in crop breeding — permanently fixing heterosis in hybrid rice through seeds.
Reference Link:- https://english.news.cn/20260725/4043ece44c9f4d11b1c777e1582d8468/c.html
Zamir Ahmed Awan is the founder and Chair of the Global Silk Route Research Alliance, a think tank in Islamabad. He studied engineering at Shanghai University in the 1980s, and years later he went back to China as Pakistan's science counsellor in Beijing, from 2010 until 2016, working on science and higher education cooperation between the two countries.…
