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Article
Published: 2018-07-31

The hybrid origin of Phai Liang, a bamboo of recent introduction into horticulture in Southeast Asia, and a new nothogenus, ×Thyrsocalamus (Bambuseae: Bambusinae)

Faculty of Science, Universiti Tunku Abdul Rahman, Jalan Universiti, Bandar Barat, 31900 Kampar, Perak, Malaysia
Department of Forest Biology, Faculty of Forestry, Kasetsart University, Bangkok, 10900, Thailand Center of Excellence for Bamboos, Kasetsart University, Bangkok 10900, Thailand Center for Advanced Studies in Tropical Natural Resources, & Center of Excellence for Bamboos, Kasetsart University, Bangkok, 10900, Thailand
Center of Excellence for Bamboos, Kasetsart University, Bangkok 10900, Thailand Center for Advanced Studies in Tropical Natural Resources, & Center of Excellence for Bamboos, Kasetsart University, Bangkok, 10900, Thailand Natural History Museum, National Science Museum, Technopolis, Pathum Thani, 12120, Thailand
Baan Sammi Nature Resort and Bamboo Garden, Doi Saket, Chiang Mai, 50200, Thailand
South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, Guangdong, 510650, China
Faculty of Science, Universiti Tunku Abdul Rahman, Jalan Universiti, Bandar Barat, 31900 Kampar, Perak, Malaysia
Faculty of Science, Universiti Tunku Abdul Rahman, Jalan Universiti, Bandar Barat, 31900 Kampar, Perak, Malaysia
Singapore Botanic Gardens, National Parks Board, 1 Cluny Road, 259569, Singapore
Monocots Dendrocalamus hybrid Malaysia Phai Liang Singapore Southeast Asia Thailand ×Thyrsocalamus liang Thyrsostachys

Abstract

Phai Liang, a recent bamboo cultivar originating in Thailand and widely introduced to many parts of Malaysia and Singapore, has yet to be diagnosed scientifically. In this study, the partial nuclear Granule Bound Starch Synthase I (GBSSI) gene of Phai Liang was cloned and sequenced to investigate its hybrid origin. Its morphological characteristics were compared with those of its putative parental taxa. Based on both molecular and morphological evidence, Phai Liang is recognized as representing a new nothogenus and nothospecies, ×Thyrsocalamus liang. This circumscribes a hybridization complex with variable morphological characters which reflect different degrees of intergradation between the parental species, Dendrocalamus membranaceus and Thyrsostachys siamensis.