A research group at the Kumamoto Prefectural Agricultural Research Center and Saga University has developed an efficient method for cross-breeding citrus fruits.

A research group from Kumamoto Prefectural Agricultural Research Center and Analytical Research Center for Experimental Sciences, Saga University has developed an efficient method for cross-breeding citrus fruits. This is expected to improve the efficiency of cross breeding of citrus varieties carried out at public experiment stations and other institutions.
Many citrus varieties are polyembryonic, when such varieties are female parents, most of the individuals formed from seed are considered unhybridized individuals. This made crossbreeding difficult, but it is now clear that this is not the case.
The paper was also published in the August 25, 2022 online edition of Molecular Breeding, Springer.

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Efficient method for generating citrus hybrids with polyembryonic Satsuma mandarin as the female parent – Molecular Breeding
カンキツの交雑育種を効率的に行う方法を開発 – Saga University (Written in Japanese)