Deletion of a 236 kb region around S 4-RNase in a stylar-part mutant S 4 sm -haplotype of Japanese pear

Okada, Kazuma; Tonaka, Nozomi; Moriya, Yuki; Norioka, Naoko; Sawamura, Yutaka; Matsumoto, Tatsuya; Nakanishi, Tetsu; Takasaki-Yasuda, Takeshi

doi:10.1007/s11103-007-9277-1

Cited by 78 publications

(87 citation statements)

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“…For example, the S 4 -RNase gene in Japanese pears (Pyrus pyrifolia) is lost in the genome of cv. Osa-Nijisseiki (Okada et al 2008), while the S 21 -RNase gene in European pears (Pyrus communis) is not expressed in the pistil of cv. Abugo (Sanzol 2009).…”

Section: Discussionmentioning

confidence: 99%

“…Most fruit tree species in the subfamilies Prunoideae and Maloideae exhibit self-incompatibility, and only a few genotypes are self-compatible . In Maloideae, it has been reported that loss of selfincompatibility may result from stylar-part mutation (SPM) (Okada et al 2008). For example, the S 4 -RNase gene in Japanese pears (Pyrus pyrifolia) is lost in the genome of cv.…”

Section: Discussionmentioning

confidence: 99%

“…In peach, SLFs may also have an influence on pollination although it is documented that SFB genes are related to pollen-S determinants (Tao et al 2007). In addition, loss-offunction of the S-RNase results in self-compatibility in both Prunus and Malus (Okada et al 2008;Ferna´ndez i Martı´et al 2009). However, differently from the general inhibition system of Prunus, in the Maloideae the inhibition of S-RNases is thought to be directly triggered by pollen-S genes, each of them providing recognition of a single or a few S-RNases and tartgeting them to degradation; thus, loss-of-function of pollen-S genes leads to opposite results: in Malus, it is expected to extend cross-incompatibility, while it leads to self-compatibility in Prunus (De Franceschi et al 2012).…”

Section: Discussionmentioning

confidence: 99%

“…Unlike Prunus species, the S-locus in both apple and pear have multiple SFB genes, and all SFB genes are exclusively expressed in pollen Okada et al 2008Okada et al , 2011Minamikawa et al 2010;Kakui et al 2011). These SFBs in apple and pear can be divided into two groups, I and II (Okada et al 2011).…”

Section: Discussionmentioning

confidence: 99%

“…However, genes for the pollen S-determinant in Malus species, belonging to the Maloideae subfamily, have not been functionally characterized (Cheng et al 2006;Kakui et al 2007Kakui et al , 2011Okada et al 2008Okada et al , 2011Sassa et al 2007Sassa et al , 2010.…”

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Identification and characterization of S-RNase genes and S-genotypes in Prunus and Malus species

Wang

Korban

et al. 2015

Can. J. Plant Sci.

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. 2015. Identification and characterization of S-RNase genes and S-genotypes in Prunus and Malus species. Can. J. Plant Sci. 95: 213Á225. Most Rosaceae fruit trees such as Prunus and Malus species exhibit gametophytic self-incompatibility that is genetically controlled by the S-locus. In turn, the S-locus contains at least two tightly-linked S-determinant genes, a pistil S-RNase and a pollen SFB. In this study, S-genotypes of 120 cultivated and wild Prunus accessions (peach) and seven wild Malus accessions (crabapple) have been characterized. Among cultivated Prunus genotypes, four S-RNase alleles, designated S 1 , S 2 , S 3 , and S 4 , have been identified, and they share typical structural features of S-RNases from all other self-incompatible Prunus species. Four S-genotypes, S 1 S 2 , S 1 S 3 , S 1 S 4 , and S 2 S 2 , were identified in peach cultivars, while only one S-genotype S 1 S 2 for wild Prunus species. The S 1 S 2 genotype is predominant in peach cultivars, accounting for 58.3% of all evaluated accessions. Similarly, four SFB alleles were identified in peach cultivars and wild accessions. However, all the four SFB alleles encode truncated proteins due to a frame-shift mutation, resulting in loss of hyper-variable and/or variable regions. For Malus species, a total of 14 S-RNase alleles are identified, and of those, two alleles encode truncated proteins. Overall, the genetic variation of both S-RNase and SFB genes in peach is significantly lower than that of S-RNase and SFB genes in self-incompatible Malus and/or Prunus species. The relationship between the genetic variation of SFB genes and the diversification of S-RNase genes in Rosaceae is also discussed.Key words: Prunus, Malus, Self-incompatibility, S-genotypes, S-RNase, Pollen, S-determinant Gu, C., Wang, L., Korban, S. S. et Han, Y. 2015. Identification et caracte´risation des ge`nes de la S-RNase et des ge´notypes-S chez les espe`ces des genres Prunus et Malus. Can. J. Plant Sci. 95: 213Á225. La plupart des arbres fruitiers de la famille des Rosace´es comme ceux des espe`ces des genres Prunus et Malus illustrent une auto-incompatibilite´game´tophytique que controˆle ge´ne´tiquement le locus-S. Ce dernier regroupe au moins deux ge`nes S-de´terminants e´troitement lie´s, un ge`ne S-RNase du pistil et un ge`ne SFB du pollen. Les auteurs ont caracte´rise´le ge´notype-S de 120 obtentions domestique´es et sauvages de peˆcher (Prunus) et de sept obtentions sauvages de pommetier (Malus). Chez les ge´notypes domestique´s de Prunus, ils ont identifie´quatre alle`les du ge`ne S-RNase, baptise´s S 1 , S 2 , S 3 , et S 4 . Ces alle`les partagent les particularite´s structurales communes aux S-RNases des autres espe`ces auto-incompatibles du genre Prunus. Quatre ge´notypes-S, S 1 S 2 , S 1 S 3 , S 1 S 4 , et S 2 S 2 ont aussi e´te´identifie´s chez les cultivars de peˆcher, mais un seul chez les espe`ces sauvages, S 1 S 2 . Le ge´notype S 1 S 2 pre´domine chez les cultivars de peˆcher et repre´sente 58,3 % de toutes les obtentions examine´es. De meˆme, on a ...

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%