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Open AccessAbstract

Performance and Genetic Diversity among a Collection of Stevia Rebaudiana Bertoni Accessions Using Microsatellite Markers in Malaysia

1
Department of Agriculture Science, Sultan Idris Education University (UPSI), 35900 Tanjong Malim, Perak, Malaysia
2
Department of Crop Science, Universiti Putra Malaysia (UPM), 43400 Serdang, Selangor, Malaysia
*
Author to whom correspondence should be addressed.
Presented at the third International Tropical Agriculture Conference (TROPAG 2019), Brisbane, Australia, 11–13 November 2019.
Proceedings 2019, 36(1), 221; https://doi.org/10.3390/proceedings2019036221
Published: 21 April 2020
(This article belongs to the Proceedings of The Third International Tropical Agriculture Conference (TROPAG 2019))
The plant Stevia rebaudiana Bertoni (2n=22) is a native of certain regions of South America particularly in Paraguay. It is a short-term plant and needs three months to complete one cycle of vegetative growth and flowering. With days less than 13 hours in tropical countries, stevia plants flower early, resulting in low yield. In addition, the early bud emergence under the short-day length condition causes the sugar content in stevia leaves to reduce drastically, making them no longer valuable for commercial use. The stevia accessions available in Malaysia today are limited in number and poor in performance, emphasizing the necessity of varietal improvement programs. Assessment of genetic variability, diversity and intrarelationships is an essential step for such breeding programs. This study aims to evaluate agronomic performance of among 21 stevia accessions, namely SRBA-1 to SRBA-21, collected from different origins and to reveal genetic diversity utilizing 52 novel microsatellites. Evaluation of agronomic traits revealed wide range of variation in leaf weight, dry leaf weight, plant height, number of branches, stevioside; rebaudioside A (Reb A), rebaudioside C (Reb C) and total steviol glycosides (TSG). The total genetic diversity detected among the accessions through amplification of the 43 polymorphic microsatellites showed that almost all markers had deviation from Hardy–Weinberg equilibrium (Ho>He). Three distinct heterotic groups were identified among the accessions based on their agronomic performance and molecular characteristics. Crosses among different accessions coming from different heterotic groups can be further used to produce potential stevia variety for plantation in Malaysia.
Keywords: Stevia Rebaudiana Bertoni; Genetic Diversity; Microsatellite Marker Stevia Rebaudiana Bertoni; Genetic Diversity; Microsatellite Marker
MDPI and ACS Style

Kashiani, P.; Saleh, G.; Rus, R.C. Performance and Genetic Diversity among a Collection of Stevia Rebaudiana Bertoni Accessions Using Microsatellite Markers in Malaysia. Proceedings 2019, 36, 221.

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