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Molecular and genetic analyses of S RNase allele in Japanese pear ‘Osa‐Nijisseiki’ ( Pyrus pyrifolia Nakai)
Author(s) -
Wu H.Q.,
Zhang S.L.,
Qu H.Y.
Publication year - 2007
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1111/j.1439-0523.2007.01299.x
Subject(s) - biology , genetics , pear , gene , allele , botany
Japanese pears exhibit S ‐RNase‐mediated gametophytic self‐incompatibility, and ‘Osa‐Nijisseiki’ ( S 2 S ; SM = stylar‐part mutant) is a self‐compatible mutant from ‘Nijisseiki’ ( S 2 S 4 ), in which the S 4 ‐allele exhibits style‐specific inactivation, but behaves as the functional S 4 ‐allele in pollen. It was unclear how S 4 RNase mutated to S RNase, despite many investigations having been carried out. In the present study, the S ‐RNase genes in ‘Osa‐Nijisseiki’ and its self‐compatible progenies were systematically investigated at genomic, transcriptional and translational level in comparison with its wild type, ‘Nijisseiki’. The results provided evidence that the S 4 RNase gene is present in the genome and expressed in the ‘Osa‐Nijisseiki’ style, especially in the stigma, but is not transmitted to its progenies.