“Once you have the hybrid, if you can induce apomixis, then you can plant it every year.”
An international team has successfully propagated a commercial hybrid rice strain as a clone from seeds with 95 percent efficiency. This could reduce the cost of hybrid rice seed, allowing low-income farmers around the world to access high-yielding, disease-resistant rice variants, according to theHalf of the world's population depends on rice as a staple food, yet hybridizing rice is rather expensive and only improves yields by approximately 10 percent.
"Once you have the hybrid, if you can induce apomixis, then you can plant it every year," Khush said. Phenotype, panicle fertility, and grain quality of progeny plants of selected apomictic events harboring the T314 and T315 T-DNA constructs.At the UC Davis Departments of Plant Biology and Plant Sciences, a group under the direction of Professor Venkatesan Sundaresan and Assistant Professor Imtiyaz Khanday accomplished apomixis in rice plants four years ago, with roughly 30 percent of seeds being clones.
"Apomixis in crop plants has been the target of worldwide research for over 30 years because it can make hybrid seed production can become accessible to everyone," Sundaresan said. "The resulting increase in yields can help meet the global needs of an increasing population without having to increase the use of land, water, and fertilizers to unsustainable levels."
According to Sundaresan, the findings might be applied to other food crops. In particular, rice serves as a genetic template for other cereal crops like maize and wheat, which together make up important global food staples.Introducing asexual reproduction through seeds – apomixis – into crop species could revolutionize agriculture by allowing F1 hybrids with enhanced yield and stability to be clonally propagated.
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