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Article

Genetic Diversity of Genes Controlling Unilateral Incompatibility in Japanese Cultivars of Chinese Cabbage

by
Yoshinobu Takada
1,*,
Atsuki Mihara
2,
Yuhui He
2,
Haolin Xie
2,
Yusuke Ozaki
2,
Hikari Nishida
2,
Seongmin Hong
3,
Yong-Pyo Lim
3,
Seiji Takayama
4,
Go Suzuki
2,* and
Masao Watanabe
1,*
1
Graduate School of Life Sciences, Tohoku University, Sendai 980-8577, Japan
2
Division of Natural Science, Osaka Kyoiku University, Kashiwara 582-8582, Japan
3
Department of Horticulture, College of Agriculture and Life Science, Chungnam National University, Daejeon 34134, Korea
4
Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo 113-8657, Japan
*
Authors to whom correspondence should be addressed.
Plants 2021, 10(11), 2467; https://doi.org/10.3390/plants10112467
Submission received: 30 September 2021 / Revised: 1 November 2021 / Accepted: 12 November 2021 / Published: 15 November 2021
(This article belongs to the Special Issue Genetics and Genomics of the Brassicaceae)
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Abstract

In recent years, unilateral incompatibility (UI), which is an incompatibility system for recognizing and rejecting foreign pollen that operates in one direction, has been shown to be closely related to self-incompatibility (SI) in Brassica rapa. The stigma- and pollen-side recognition factors (SUI1 and PUI1, respectively) of this UI are similar to those of SI (stigma-side SRK and pollen-side SP11), indicating that SUI1 and PUI1 interact with each other and cause pollen-pistil incompatibility only when a specific genotype is pollinated. To clarify the genetic diversity of SUI1 and PUI1 in Japanese B. rapa, here we investigated the UI phenotype and the SUI1/PUI1 sequences in Japanese commercial varieties of Chinese cabbage. The present study showed that multiple copies of nonfunctional PUI1 were located within and in the vicinity of the UI locus region, and that the functional SUI1 was highly conserved in Chinese cabbage. In addition, we found a novel nonfunctional SUI1 allele with a dominant negative effect on the functional SUI1 allele in the heterozygote.
Keywords: allelic diversity; Brassica rapa; Chinese cabbage; dominant negative effect; gene duplication; pollen-stigma interaction; self-incompatibility; unilateral incompatibility allelic diversity; Brassica rapa; Chinese cabbage; dominant negative effect; gene duplication; pollen-stigma interaction; self-incompatibility; unilateral incompatibility

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MDPI and ACS Style

Takada, Y.; Mihara, A.; He, Y.; Xie, H.; Ozaki, Y.; Nishida, H.; Hong, S.; Lim, Y.-P.; Takayama, S.; Suzuki, G.; et al. Genetic Diversity of Genes Controlling Unilateral Incompatibility in Japanese Cultivars of Chinese Cabbage. Plants 2021, 10, 2467. https://doi.org/10.3390/plants10112467

AMA Style

Takada Y, Mihara A, He Y, Xie H, Ozaki Y, Nishida H, Hong S, Lim Y-P, Takayama S, Suzuki G, et al. Genetic Diversity of Genes Controlling Unilateral Incompatibility in Japanese Cultivars of Chinese Cabbage. Plants. 2021; 10(11):2467. https://doi.org/10.3390/plants10112467

Chicago/Turabian Style

Takada, Yoshinobu, Atsuki Mihara, Yuhui He, Haolin Xie, Yusuke Ozaki, Hikari Nishida, Seongmin Hong, Yong-Pyo Lim, Seiji Takayama, Go Suzuki, and et al. 2021. "Genetic Diversity of Genes Controlling Unilateral Incompatibility in Japanese Cultivars of Chinese Cabbage" Plants 10, no. 11: 2467. https://doi.org/10.3390/plants10112467

APA Style

Takada, Y., Mihara, A., He, Y., Xie, H., Ozaki, Y., Nishida, H., Hong, S., Lim, Y.-P., Takayama, S., Suzuki, G., & Watanabe, M. (2021). Genetic Diversity of Genes Controlling Unilateral Incompatibility in Japanese Cultivars of Chinese Cabbage. Plants, 10(11), 2467. https://doi.org/10.3390/plants10112467

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