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Genetic architecture of the S-locus supergene revealed by Zhonglai Luo1,2✉, Spencer C.H. Barrett3, Tieyao Tu1, Zhongtao Zhao1, Shanshan Jia1 , 7 Shiran Gu1, Tingting Duan1,4, Yu Zhang1, Bingqiang Xu1, Lei Gu1,5, Xiaofang Deng1,6 , 8Libo Jiang2, Miaomiao Shi1✉, Dianxiang Zhang1✉ 9 is a book available to read on EtoBox.

What is Genetic architecture of the S-locus supergene revealed about?

Summary33  Heterostyly is a polymorphic floral adaptation controlled by supergenes and34 maintained in populations by disassortative mating. The molecular basis of distyly35 has been investigated in several unrelated families. Previous studies have been36 limited to diploid species and have not included Rubiaceae, which has the highest37 number of heterostylous species.38  Here, we investigate the genetic architecture of tetraploid Schizomussaenda henryi39 (Rubiaceae) to identify candidate style-length genes, evidence for hemizygosity and40 the potential role of gene duplication in the evolution of the S-locus. Chromosome41 level genome assemblies and transcriptomic approaches identified the S-locus42 region comprised of four hemizygous genes.43  The candidate gene SchzAUX22 may regulate style length and filament growth by44 acting in the auxin signaling pathway. Comparative studies of the two sub-genomes45 of S. henryi indicated strong similarities and no significant sub-genome dominance,46 as expected from autotetraploidy. Evidence from haplotype-resolved assemblies of47 a short-styled plant indicated that it possessed the ssSS genotype, consistent with48 autotetraploidy, whi

Author

Zhonglai Luo1,2✉, Spencer C.H. Barrett3, Tieyao Tu1, Zhongtao Zhao1, Shanshan Jia1 , 7 Shiran Gu1, Tingting Duan1,4, Yu Zhang1, Bingqiang Xu1, Lei Gu1,5, Xiaofang Deng1,6 , 8Libo Jiang2, Miaomiao Shi1✉, Dianxiang Zhang1✉ 9

Published

2025

Language

EN