Abstract Detail

Systematics

Sherman-Broyles, Sue [1], Strickler, Susan [2], Powell, Adrian [2], Bombarely, Aureliano [3], Li, Shujie [4], Farmer, Andrew [5], Liu, Qingli [6], Brown, A. H. D. [7], Doyle, Jeff [8].

Harnessing genome(s)-wide variation to refine understanding of the perennial members of the soybean genus (Glycine: Leguminosae).

The perennial relatives of the cultivated soybean (Glycine max) are a group of around 30 species that comprise Glycine subg. Glycine. At the diploid level (2n = 38, 40), they are confined to the Sahul (Australia and Papua New Guinea), but several allopolyploids (2n = 78, 80) have colonized islands of the Pacific Ocean. Polyploids formed recently (< 500,000 years) from at least eight different combinations of around eight diploid genomes. New species continue to be identified in subg. Glycine, both through collecting in remote regions of Australia and through sampling molecular variation across known species. Nomenclature lags behind taxonomy, in large part due to the complex patterns of morphological variation caused by shared genomes among diploid and allopolyploid taxa. Relationships hypothesized from early crossing studies that identified “genome groups” of diploid species were refined by the application of molecular data and greater sampling, and are now being studied at the whole genome level through the application of genotyping by sequencing (GBS) and the sequencing of entire plastid and mitochondrial genomes. GBS, in particular, is useful for diagnosing misidentified accessions in the large (> 2000 accessions) subg. Glycine germplasm collection, for identifying diploid or allopolyploid hybrids and providing hypotheses of their progenitors, and for revealing unexpected diversity that could represent new species within the subgenus.

1 - Cornell University, Plant Breeding & Genetics Section, School of Integrative Plant Science, Ithaca, NY, 14853, USA
2 - Boyce Thompson Institute for Plant Research, Ithaca, NY, 14853, USA
3 - Virginia Tech, Department Of Horticulture, Virginia Tech, 216 Latham Hall, 220 Ag Quad Lane, Latham Hall 216, 220 Ag Quad Lane, Blacksburg, VA, 24060, United States
4 - Cornell University, Plant Biology Section, School of Integrative Plant Science, Ithaca, NY, 14853, USA
5 - National Center for Genome Resources, 2935 Rodeo Park Drive East, Santa Fe, NM, 87505, USA
6 - Syngenta Crop Protection, 9 Davis Drive, Research Triangle Park, NC, 27709, USA
7 - Biodiversity International, Rome, Italy
8 - Cornell University, School Of Integrative Plant Science, Plant Breeding & Genetics Section, 240 Emerson Hall, Ithaca, NY, 14853, United States

Keywords:
Glycine
soybean
genome-wide variation
allopolyploidy
organelle genomes.

Presentation Type: Oral Paper
Session: 37, Systematics III--Monocots 2 to Caryophs
Location: 111/Mayo Civic Center
Date: Wednesday, July 25th, 2018
Time: 8:45 AM
Number: 37004
Abstract ID:341
Candidate for Awards:None