2021
DOI: 10.1038/s41438-021-00634-8
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Downregulated expression of S2-RNase attenuates self-incompatibility in “Guiyou No. 1” pummelo

Abstract: Self-incompatibility (SI) substantially restricts the yield and quality of citrus. Therefore, breeding and analyzing self-compatible germplasm is of great theoretical and practical significance for citrus. Here, we focus on the mechanism of a self-compatibility mutation in ‘Guiyou No. 1’ pummelo (Citrus maxima), which is a spontaneous mutant of ‘Shatian’ pummelo (Citrus maxima, self-incompatibility). The rate of fruit set and the growth of pollen tubes in the pistil confirmed that a spontaneous mutation in the… Show more

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Cited by 18 publications
(19 citation statements)
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“…To evaluate heterozygosity within genomes and the association of heterozygosity with the reproductive modes, we estimated genic hemizygosity based on presence and absence variants (PAVs) in five assemblies with deep long-read coverage (>100-fold). The five assemblies included: a doubled-haploid sweet orange, which served as homozygous control; our inbred Hongkong kumquat; a diploid pummelo cultivar, ‘GY’, that was sexually reproducing [ 39 ], an apomictic diploid sweet orange cultivar, ‘UKXC’ [ 38 ], and an apomictic diploid wild trifoliate orange, ‘ZK8’ (Fig. 1 c and Table S6) [ 7 ].…”
Section: Resultsmentioning
confidence: 99%
“…To evaluate heterozygosity within genomes and the association of heterozygosity with the reproductive modes, we estimated genic hemizygosity based on presence and absence variants (PAVs) in five assemblies with deep long-read coverage (>100-fold). The five assemblies included: a doubled-haploid sweet orange, which served as homozygous control; our inbred Hongkong kumquat; a diploid pummelo cultivar, ‘GY’, that was sexually reproducing [ 39 ], an apomictic diploid sweet orange cultivar, ‘UKXC’ [ 38 ], and an apomictic diploid wild trifoliate orange, ‘ZK8’ (Fig. 1 c and Table S6) [ 7 ].…”
Section: Resultsmentioning
confidence: 99%
“…The mutation of S-RNase has been found to be related to the transition from SI to SC. For example, the loss of SI in “Guiyou” pummelo ( C. maxima , Rutaceae) was attributed to a pistil-side Sm-RNase mutation ( Liang et al 2020 ; Hu et al 2021 ). Moreover, the production of a stable SC phenotype was caused by a loss-of-function mutation in some Solanaceae species ( Solanum pennellii, Solanum habrochaites , and Solanum arcanum ) ( Kubo et al 2015 ; Ma et al 2021 ).…”
Section: Discussionmentioning
confidence: 99%
“…The Chinese cultivars 'Guiyou No. 1' and 'Zigui Shatian' are self-compatible mutants of selfincompatible 'Shatian' pummelo (Chai et al, 2010b;Hu et al, 2021). A contrasting example of the development of self-compatibility from a self-incompatible cultivar has been reported in 'Wuzishatangju', which is self-incompatible and developed from the selfcompatible 'Shatangju' (Ye et al, 2009).…”
Section: Mutants Of Citrus Varieties Regarding Selfincompatibilitymentioning
confidence: 99%