TY - JOUR
T1 - Genome Sequencing Reveals the Role of MADS-box Gene Families in the Floral Morphology Evolution of Orchids
AU - Lu, Hsiangchia
AU - Liu, Zhongjian
AU - Lan, Siren
N1 - Funding Information:
This work is supported by the Teamwork Projects Funded by Guangdong Natural Science Foundation , China (Grant No. 2017A030312004 ); The National Natural Science Foundation of China (Grant No. 31870199 ); The National Key Research and Development Program of China (Grant No. 2018YFD1000401) and Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization Construction Funds (Grant No. 115/118990050;115/KJG18016A).
Funding Information:
This work is supported by the Teamwork Projects Funded by Guangdong Natural Science Foundation, China (Grant No. 2017A030312004); The National Natural Science Foundation of China (Grant No. 31870199); The National Key Research and Development Program of China (Grant No. 2018YFD1000401) and Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization Construction Funds (Grant No. 115/118990050;115/KJG18016A).
Publisher Copyright:
© 2019 Chinese Society for Horticultural Science (CSHS) and Institute of Vegetables and Flowers (IVF), Chinese Academy of Agricultural Sciences (CAAS)
PY - 2019/11
Y1 - 2019/11
N2 - Orchid origin and evolution are common topics in evolutionary biology. Orchidaceae have approximately 30 000 orchid species distributed in diverse habitats and account for approximately 10% of the flowering plant species worldwide. Orchids provide us with materials to explore coevolution and organic evolution. In this review, we highlighted the genome study progress of orchids. In addition, we revealed the role of MADS-box gene families in the floral morphology and evolution of orchids. Genomics studies confirmed that all five subfamilies of existing orchids evolved from a common ancestor. Loss of Mβ MADS-box genes resulted in the endosperm from the seed of all existing orchids being absent. Perianth reversion to the ancestral state occurred because Apostasia and Apostasioideae lost B-AP3 and E class paralogous genes. Loss of P-subclade members of MIKC*-Type in Phalaenopsis equestris, Dendrobium catenatum, and Epidendroideae caused the formation of pollinium. In addition, the combined loss of AGL12 and contraction of ANR1 gave orchids the ability to be successfully epiphytic on trees or rocks and to develop a unique root system. Both pollinium and epiphytic production on trees are beneficial for orchid adaptations, and Epidendroideae evolved more species (∼ 20 000) than Apostasioideae (16 species). Genome studies shed new light on determining the evolutionary history of orchids and understanding the genetic mechanisms of orchid morphological evolution.
AB - Orchid origin and evolution are common topics in evolutionary biology. Orchidaceae have approximately 30 000 orchid species distributed in diverse habitats and account for approximately 10% of the flowering plant species worldwide. Orchids provide us with materials to explore coevolution and organic evolution. In this review, we highlighted the genome study progress of orchids. In addition, we revealed the role of MADS-box gene families in the floral morphology and evolution of orchids. Genomics studies confirmed that all five subfamilies of existing orchids evolved from a common ancestor. Loss of Mβ MADS-box genes resulted in the endosperm from the seed of all existing orchids being absent. Perianth reversion to the ancestral state occurred because Apostasia and Apostasioideae lost B-AP3 and E class paralogous genes. Loss of P-subclade members of MIKC*-Type in Phalaenopsis equestris, Dendrobium catenatum, and Epidendroideae caused the formation of pollinium. In addition, the combined loss of AGL12 and contraction of ANR1 gave orchids the ability to be successfully epiphytic on trees or rocks and to develop a unique root system. Both pollinium and epiphytic production on trees are beneficial for orchid adaptations, and Epidendroideae evolved more species (∼ 20 000) than Apostasioideae (16 species). Genome studies shed new light on determining the evolutionary history of orchids and understanding the genetic mechanisms of orchid morphological evolution.
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U2 - 10.1016/j.hpj.2019.11.005
DO - 10.1016/j.hpj.2019.11.005
M3 - Article
AN - SCOPUS:85076513227
SN - 2095-9885
VL - 5
SP - 247
EP - 254
JO - Horticultural Plant Journal
JF - Horticultural Plant Journal
IS - 6
ER -