Papaver self-incompatibility is controlled by two multiallelic idiomorphs.

Authors

Ke Jin, Zezhen Du, Tao Xiong, Fuyu Leng, Jian Liu, Mannan Zhang, Boyang Tian, Jianbing Hu, Huirong Hu, Wen'en Wang, Tao Zhao, Jia-Yu Xue, Xiaofei Yang, Kai Ye, Chunlong Li, Xin Wang, Xia Wang, Xutong Wang, Lijun Chai, Qiang Xu, Miao Sun, Vernonica E Franklin-Tong, Boris Igić, Wen-Biao Jiao, Zongcheng Lin

Published in

Science (New York, N.Y.). Volume 394. Issue 6823. Pages eaeg6988. Oct 29, 2026. Epub Oct 29, 2026.

Abstract

Self-incompatibility (SI) prevents self-fertilization through highly polymorphic genetic recognition at the S locus with multiple alleles. In Papaver rhoeas, the S determinants were previously identified as PrpS and PrsS. However, we found that PrpS-PrsS was absent in many S haplotypes. In this work, we report the identification of an alternative pair of polymorphic S genes, S locus oligopeptide transporter (SOPT) and S locus glycine-rich protein (SGRP), segregating at the S locus when PrpS-PrsS is absent. SOPT and SGRP display hallmark S determinant features and confer SI when heterologously expressed in Arabidopsis thaliana. Therefore, instead of having allelomorphs with homologous variants, the Papaver SI system is determined by two multiallelic idiomorphs sharing no obvious common ancestry. This discovery of a dual-idiomorph system reveals a distinct genetic basis for polymorphism, with implications for the evolution of allorecognition mechanisms.

PMID:
42956138
Bibliographic data and abstract were imported from PubMed on 30 Oct 2026.

Read full publication at:
Please sign in to see all details.

Stats

1-terrible, 9-excellent. How would you rate this publication? Sign in in to submit your rating.

Post a comment

You need to be signed in to post comments. You can sign in here.

Comments

There are no comments yet.