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Triticeae genome sequences reveal huge expansions of gene families implicated in fertility restoration

Journal

CURRENT OPINION IN PLANT BIOLOGY
Volume 66, Issue -, Pages -

Publisher

CURRENT BIOLOGY LTD
DOI: 10.1016/j.pbi.2021.102166

Keywords

Cytoplasmic male sterility; CMS; Restorer-of-fertility-like genes; RFL; Pentatricopeptide repeat proteins; PPR; Mitochondrial transcription termination factors; mTERF; Hybrid breeding; Mitochondrial-nuclear genome interactions; Trticeae genomes

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Funding

  1. Australian Research Council Centre of Excellence in Plant Energy Biology [CE140100008]

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Recent breakthroughs in sequencing data have revealed unexpected expansions in gene families related to restoring fertility in certain species, which will greatly benefit the development of hybrid production strategies in wheat and related species.
Breakthroughs in assembly of whole-genome sequencing and targeted sequence capture data have accelerated comparative genomics analyses in cereals with big and complex genomes such as wheat. This newly acquired information has revealed unexpected expansions in two large gene families linked to restoration of fertility in species that exhibit cytoplasmic male sterility. Extreme levels of copy-number and structural variation detected within and between species illustrate the genetic diversity among the family members and reveal the evolutionary mechanisms at work. This new knowledge will greatly facilitate the development of hybrid production strategies in wheat and related species.

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