Publication: Phenotypic variation of cassava root traits and their responses to drought
Issued Date
2019-04-01
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ISSN
15372197
21680450
21680450
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2-s2.0-85064845396
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Mahidol University
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SCOPUS
Bibliographic Citation
Applications in Plant Sciences. Vol.7, No.4 (2019)
Suggested Citation
Jitrana Kengkanna, Phissinee Jakaew, Suwaluk Amawan, Natalie Busener, Alexander Bucksch, Patompong Saengwilai Phenotypic variation of cassava root traits and their responses to drought. Applications in Plant Sciences. Vol.7, No.4 (2019). doi:10.1002/aps3.1238 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/49789
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Title
Phenotypic variation of cassava root traits and their responses to drought
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Abstract
© 2019 Kengkanna et al. Applications in Plant Sciences is published by Wiley Periodicals, Inc. on behalf of the Botanical Society of America Premise of the Study: The key to increased cassava production is balancing the trade-off between marketable roots and traits that drive nutrient and water uptake. However, only a small number of protocols have been developed for cassava roots. Here, we introduce a set of new variables and methods to phenotype cassava roots and enhance breeding pipelines. Methods: Different cassava genotypes were planted in pot and field conditions under well-watered and drought treatments. We developed cassava shovelomics and used digital imaging of root traits (DIRT) to evaluate geometrical root traits in addition to common traits (e.g., length, number). Results: Cassava shovelomics and DIRT were successfully implemented to extract root phenotypes, and a large phenotypic variation for root traits was observed. Significant correlations were found among root traits measured manually and by DIRT. Drought significantly decreased shoot dry weight, total root number, and root length by 84%, 30%, and 25%, respectively. High adventitious root number was associated with increased shoot dry weight (r = 0.44) under drought. Discussion: Our methods allow for high-throughput cassava root phenotyping, which makes a breeding program targeting root traits feasible. We suggest that root number is a breeding target for improved cassava production under drought.