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Development of a genotype-specific molecular marker associated with restoration-of-fertility (Rf) in chile pepper (Capsicum annuum)

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Abstract

Cytoplasmic male sterility (CMS) breeding systems expedite the production of hybrid seed in many crops. By taking advantage of an interaction between the nucleus and the cytoplasm that regulates the production of viable pollen, CMS eliminates the need for manual emasculation. Markers that can identify the status of cytoplasmic male sterility and nuclear restorer-of-fertility (Rf) genes are valuable for identification and development of CMS systems. In chile pepper (Capsicum annuum), reliable markers for the Rf trait have been elusive. To identify viable Rf markers for chile pepper, markers were created using identified Rf candidate genes and compared them to the most effective previously reported Rf markers. The previously reported cleaved amplified polymorphic sequence (CAPS) marker Co1Mod1-CAPS and PPR-derived CaRf648, had the highest rates of correctly predicting the Rf phenotype for an F2 segregating population. The Co1Mod1-CAPS marker detected the Rf genotype, and CaRf648 quickly and inexpensively identified Rf presence.

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Data availability

The datasets generated during during the current study are available in the World Vegetable Center HARVEST repository, https://worldveg.tind.io/record/73337?ln=en.

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Acknowledgements

Funding for this research was provided by the long-term strategic donors to the World Vegetable Center, Republic of China (Taiwan); UK aid from the UK government; U.S. Agency for International Development (USAID); Australian Centre for International Agricultural Research (ACIAR), Germany, Thailand, Philippines, Korea, and Japan.

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FAO, DWB, and PWB conceptualized and designed the research, FAO and BW conducted the experiments. FAO wrote the paper and all authors have read, edited, and approved of the final manuscript.

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Correspondence to Derek W. Barchenger.

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The authors declare that they have no conflicts of interest.

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This research did not involve experiments with human or animal participants.

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Ortega, F.A., Barchenger, D.W., Wei, B. et al. Development of a genotype-specific molecular marker associated with restoration-of-fertility (Rf) in chile pepper (Capsicum annuum). Euphytica 216, 43 (2020). https://doi.org/10.1007/s10681-020-2579-y

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  • DOI: https://doi.org/10.1007/s10681-020-2579-y

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