What is it about?

To uncover how interactions between the cytoplasmic and nuclear genomes affect citrus hybridization, we performed a citrus pan-mitogenome and combined 184 whole genome sequencing data of citrus to analyse the nuclear, mitochondrial, and chloroplast genomes. The prominent divergence in the mitogenomes and the genetic load in the cytoplasmic genomes may provide the genetic basis for cytoplasmic male sterility and thus, influence the reshuffling of the cytoplasmic and nuclear genomes during hybridization.

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Why is it important?

Citrus is one of the major horticultural crops grown worldwide. People commonly eat its fruit and drink its juice. The findings in this paper suggest that cytoplasmic and nuclear genome interactions in citrus have important implications for genetics and breeding, especially for fruit breeding with no seeds.


The key mitochondrial genes identified in this research will be further studied to facilitate citrus seedless breeding.

Wenwu Guo
Huazhong Agriculture University

Read the Original

This page is a summary of: Pan-mitogenomics reveals the genetic basis of cytonuclear conflicts in citrus hybridization, domestication, and diversification, Proceedings of the National Academy of Sciences, October 2022, Proceedings of the National Academy of Sciences, DOI: 10.1073/pnas.2206076119.
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