Molecular and genetic analyses of four nonfunctional S haplotype variants derived from a common ancestral S haplotype identified in sour cherry (Prunus cerasus L.).

Genetics
Tatsuya TsukamotoA F Iezzoni

Abstract

Tetraploid sour cherry (Prunus cerasus) has an S-RNase-based gametophytic self-incompatibility (GSI) system; however, individuals can be either self-incompatible (SI) or self-compatible (SC). Unlike the situation in the Solanaceae, where self-compatibility accompanying polyploidization is often due to the compatibility of heteroallelic pollen, the genotype-dependent loss of SI in sour cherry is due to the compatibility of pollen containing two nonfunctional S haplotypes. Sour cherry individuals with the S(4)S(6)S(36a)S(36b) genotype are predicted to be SC, as only pollen containing both nonfunctional S(36a) and S(36b) haplotypes would be SC. However, we previously found that individuals of this genotype were SI. Here we describe four nonfunctional S(36) variants. Our molecular analyses identified a mutation that would confer loss of stylar S function for one of the variants, and two alterations that might cause loss of pollen S function for all four variants. Genetic crosses showed that individuals possessing two nonfunctional S(36) haplotypes and two functional S haplotypes have reduced self-fertilization due to a very low frequency of transmission of the one pollen type that would be SC. Our finding that the underlying mechan...Continue Reading

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Citations

Oct 29, 2014·Parasite : Journal De La Société Française De Parasitologie·Concepta McManusSamuel R Paiva
Dec 29, 2015·Biochimica Et Biophysica Acta·Dongyan ZhaoNing Jiang
Sep 7, 2016·Nature Plants·Sota FujiiSeiji Takayama
May 31, 2019·Life Science Alliance·Dominique PontierThierry Lagrange
Aug 6, 2019·Frontiers in Plant Science·Jorge VieiraCristina P Vieira
Sep 10, 2015·Microbiology Spectrum·Jainy Thomas, Ellen J Pritham

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