Acta Horticulturae Sinica ›› 2021, Vol. 48 ›› Issue (4): 759-777.doi: 10.16420/j.issn.0513-353x.2020-0425

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Recent Advances on Self-incompatibility Mechanism in Fruit Trees

HE Min, GU Chao, WU Juyou, ZHANG Shaoling()   

  1. Pear Engineering and Technology Research Center,State Key Laboratory of Crop Genetics and Germplasm Enhancement,College of Horticulture,Nanjing Agricultural University,Nanjing 210095,China
  • Received:2020-08-14 Online:2021-04-25 Published:2021-04-29
  • Contact: ZHANG Shaoling


Self-incompatibility is a genetic mechanism which inhibits self-crossing and promotes out-crossing in flowering plants. Apple,pear,and other fruit trees exhibit the typical gametophytic self-incompatibility that is determined by the multiple alleles(S-allele)at a single locus(S-locus)containing at least two genes. One is the stylar-S determinant that is determined by the S-RNase gene,while the other is the pollen-S determinant that may be controlled by one or multiple F-box genes. The research progress of gametophytic self-incompatibility in Rosaceae and Rutaceae fruit trees is introduced as follows:the discovery of the male and female determinants,the mechanism of self-incompatibility mutation,S-RNase-mediated pollen tube signal transduction,and the application of self-incompatibility mutation in new variety breeding. These information is available for the studies of gametophytic self-incompatibility in future.

Key words: fruit tree, gametophytic self-incompatibility, S-RNase, pollen F-box

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