Diversification of mandarin citrus by hybrid speciation and apomixis

Wu, Guohong Albert; Sugimoto, Chikatoshi; Kinjo, Hideyasu; Azama, Chika; Mitsube, Fumimasa; Talon, Manuel; Gmitter, Jr., Frederick G.; Rokhsar, Daniel S.

doi:10.1038/s41467-021-24653-0

Title: Diversification of mandarin citrus by hybrid speciation and apomixis

Journal Article · 25 July 2021 · Nature Communications

DOI: https://doi.org/10.1038/s41467-021-24653-0 · OSTI ID:1820335

^[1]; Sugimoto, Chikatoshi ^[2]; Kinjo, Hideyasu ^[3];

^[2]; Mitsube, Fumimasa ^[3]; Talon, Manuel ^[4];

^[5];

^[6]

Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Okinawa Inst. of Science and Technology Graduate Univ. (Japan)
Okinawa Prefectural Agricultural Research Center (Japan)
Inst. Valenciano de Investigaciones Agrarias (Spain)
Univ. of Florida, Lake Alfred, FL (United States)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Okinawa Institute of Science and Technology Graduate Univ. (Japan); Univ. of California, Berkeley, CA (United States)

The origin and dispersal of cultivated and wild mandarin and related citrus are poorly understood. Here, comparative genome analysis of 69 new east Asian genomes and other mainland Asian citrus reveals a previously unrecognized wild sexual species native to the Ryukyu Islands: C. ryukyuensis sp. nov. The taxonomic complexity of east Asian mandarins then collapses to a satisfying simplicity, accounting for tachibana, shiikuwasha, and other traditional Ryukyuan mandarin types as homoploid hybrid species formed by combining C. ryukyuensis with various mainland mandarins. These hybrid species reproduce clonally by apomictic seed, a trait shared with oranges, grapefruits, lemons and many cultivated mandarins. We trace the origin of apomixis alleles in citrus to mangshanyeju wild mandarins, which played a central role in citrus domestication via adaptive wild introgression. Our results provide a coherent biogeographic framework for understanding the diversity and domestication of mandarin-type citrus through speciation, admixture, and rapid diffusion of apomictic reproduction.

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Biological and Environmental Research (BER)

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 1820335

Journal Information:: Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 12; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Title: Diversification of mandarin citrus by hybrid speciation and apomixis

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