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This research aims to understand the genetic basis of daily sex alternation in avocado and its floral timing mechanisms.

Balanced polymorphism in a floral transcription factor underlies the ancient rhythm of daily sex alternation in avocado

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Randomized trial uncovers sex alternation mechanisms in avocado, indicating a role for transcription factors in floral development.

This research aims to understand the genetic basis of daily sex alternation in avocado and its floral timing mechanisms.
Mapped floral sex dimorphism to haplotypes at SDMYB
Analyzed rhythmic expression of SDMYB linked to floral anthesis
Examined ancient trans-species polymorphism in Lauraceae
The dominant SDMYB allele causes a delay in flower opening (A-type) with a significant corresponding phenotypic effect (p<0.01).
Balancing selection maintained the SDMYB polymorphism for 42 million years, showing its evolutionary significance.
The polymorphism is observed in at least 26 nonavocado species, highlighting its broader ecological relevance.

Groh et al. (2026) studied this question.

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