logo7th International Legume Conference
"Legume Systematics for Next Generation"  29 Aug - 2 Sept 2018,  Sendai,   JAPAN
 

Symposium

Symposia


We plan to hold about 11 symposia. The duration of each session is 90 min and generally for six speakers (15 min each).  Some symposia include two sessions (in total 180 min). Symposium organizers can make a slight change for the number of speakers and presentation time. We will inform detail of symposia soon. Symposia accepted and in preparation are as follows.

 

Symposium Details

 Root to Tip Legume Phylogenomics: Building the Phylogenetic Foundations for Next Generation Legume Systematics


Organizers:

Colin Hughes, University of Zurich, Switzerland
Toby Pennington, University of Exeter, U.K.
Jeff Doyle, Cornell University, U.S.A.

Phylogenetics is rapidly being transformed into phylogenomics by the quickly growing availability of much larger, genome-scale DNA sequence data sets that can be generated via next generation sequencing (NGS). These new data sets have potential for building much enhanced phylogenies at all phylogenetic levels from the root to the tips of the tree, to resolve both deep higher-level relationships as well as the complex and often reticulate patterns at and around the species level. These data also provide the foundations needed for elucidating gene and genome evolution, including the history of whole genome and gene duplications, as well as levels of congruence / discordance among genes and genomes and signatures of selection, insights which are critical for accurate phylogeny reconstruction. These developments are also revolutionizing how we build phylogenies with promising new approaches and methods emerging. These more robust phylogenetic foundations are critical for marshalling massive amounts of comparative data to address a wide range of systematics questions. Despite major advances, including the recent LPWG phylogeny which encompasses almost all legume genera, reconstructing a robust legume phylogeny remains challenging given the large size of the family and the apparent rapid radiation of legumes as a whole as well as key other clades, that result in short branch lengths. Over the last five years since ILC6 a raft of new legume projects generating NGS data have started. These include new whole genome sequences for key taxa, large scale sequencing of plastomes, transcriptome sequencing of representative taxa across the family, large nuclear gene sequence datasets generated via targeted enrichment (hybrid sequence capture) for a number of legume clades, and RADseq data. This symposium aims to: (i) present results from a range of legume phylogenomics initiatives spanning different hierarchical levels; (ii) provide an overview of data types and approaches for different questions; (iii) review the state of play with respect to available genome-scale data for legumes; and (iv) prompt discussion about strategies for new sequencing efforts and for building the next generation legume phylogeny.

Phylogenetic niche conservatism, biome switching and adaptation in legume evolution


Organizers:

Toby Pennington, University of Exeter, U.K.
Colin Hughes, University of Zurich, Switzerland

The concept of phylogenetic niche conservatism – that organisms tend to maintain their ancestral ecological predilections - has become influential in plant evolution and biogeography. Conversely, some studies show that frequent evolutionary switches, even between major biomes such as tropical forests and savannas, have made a considerable contribution to modern day patterns of species distribution. Because legumes dominate many major biomes they make ideal case studies for investigating phylogenetic niche conservatism and biome switching, and empirical studies based upon legumes continue to play an important role. This symposium will showcase new empirical studies but will also consider the broader conceptual framework for studies of biome-switching in plant evolution. Ultimately, the ability of lineages to switch biomes, or their degree of niche conservatism, is contingent on the ease of evolution of specific adaptations to overcome major adaptive barriers, including suites of critical legume functional traits such as nodulation, frost, drought and fire tolerance, growth forms and leaf characteristics, and the symposium will also consider the evolution and biogeography of some of these key traits.

Evolution and systematics of subfamily Detarioideae


Organizers:

Manuel de la Estrella, University of Cordoba, Spain
Bente Klitgaard, Royal Botanic Gardens, Kew, UK
Anne Bruneau, University of Montreal, Canada

Detarioideae is one of the early diverging clades within legumes and has recently been recognised at the subfamily level by the Legume Phylogeny Working Group. The subfamily comprises 81 genera and c. 760 species distributed across the world tropics. 
The Detarioideae lineage is unusually variable and phylogenetically labile in flower morphology. Recurrent switches in flower morphology are detected across the subfamily, with species ranging from having radially symmetrical flowers with five petals, to having a single large petal or three larger petals in a bilateral arrangement, or entirely lacking petals.
Although no single Detarioideae genus has been found to fix nitrogen, Detarioideae are known to be associated with mycorrhizal fungi; and this association may have played an important role in shaping the diversity and evolution of the group. Many of the tree species belonging to this subfamily dominate large expanses of forest, especially in tropical Africa, where Detarioideae trees can form single species dominated groves; and include some of the hyperdominant species of the Amazon.
This Detarioideae symposium aims to: (i) share results of recent taxonomic efforts in understanding Detarioideae diversity; (ii) show the importance of flower variability and plant-pollinator relationships in the evolutionary patterns observed within Detarioideae; (iii) link phylogenetic and biogeographic studies of Detarioideae clades; and (iv) deepen our understanding of the mycorrizhal associations within Detarioideae and their role in the subfamily dominance of tropical forests.

Celebrating 40 years of legume systematics: the productive career of Gwilym P. Lewis


Organizers:

Anne Bruneau, University of Montreal, Canada
Luciano Paganucci de Queiroz, UEFS, Brazil

During his long research career at the Royal Botanic Gardens, Kew, Gwilym P. Lewis has contributed significantly and importantly to the systematics, phylogenetics, biogeography, diversity and comparative biology of neotropical Leguminosae, especially Caesalpinioideae and including mimosoid legumes. His floristic expertise has focused on the drylands and wet tropics of Brazil and the Andes of Ecuador, and he has produced monographic work on the large genus Caesalpinia. His research and publication has been multidisciplinary (including: taxonomic revision, phylogenetic studies, reproductive biology, floral anatomy, phytochemistry and biogeography) and has involved international networks. Gwil Lewis has provided specialist legume identification services which have facilitated legume work in conservation and sustainable use, and guided student training both within Kew and globally. His higher level systematic studies have contributed to an improved legume phylogeny from which the legume research community has developed the new classification of the family. In his long career, dedicated to legumes, Gwil Lewis has seen legume systematics evolve from a taxonomic and floristically focused research community to a phylogenetically-based, hypothesis driven science motivated by questions of global biome distribution to flower evolution and genomics. Dr. Lewis has been a witness to the major changes in our research community over the past 40 years, and particularly since the publication of the first volume of Advances in Legume Systematics in 1981. This symposium is dedicated to Gwilym P. Lewis and to his important contribution to legume systematics.