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Abstract Detail

Comparative Genomics/Transcriptomics

Garza, Elyssa [1], Daundasekara, Kasuni [1], Pepper, Alan [2].

Revealing the problems of whole genome duplication in regards to the search for serpentine stress QTL.

Plants grown in serpentine soils are exposed to a suite of stresses (low essential nutrients, low calcium-to-magnesium ratios, toxic heavy metals, and low water retention) that the processes of selection can act on. The genetic material (the genome) underlying and affected by these processes is dynamic and changes as the organism adapts to a new/stressed environment. Examination and comparison of two Caulanthus amplexicaulis sister plant genomes- where one grows exclusively in serpentine soil and the other in granite soil- reveals signatures of whole duplication and fractionation over time. Initially, these two taxa were compared to identify QTL involved with serpentine tolerance, and related Ni tolerance and low Ca ratios. However, analyses were challenged by the presence of orthologs and paralogs of genes within the genomes. It is important to expose the rigors needed to identify and assess QTL/genes that are single copy or multiple copy due to whole genome duplication events. Here we will present approaches that we undertook to address the complexities of whole genome duplication and/fractionation events.

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1 - Texas A&M University, Biology, 400 Bizzell St, College Station, Texas, 77843, United States
2 - Texas A&M University, Department Of Biology, Texas A&M University, TAMU 3258, 214 Bsbe, College Station, TX, 77843, United States

abiotic and biotic stress
Gene duplication
Whole genome duplication.

Presentation Type: Poster
Session: P1, Comparative Genomics/Transcriptomics Posters
Location: Virtual/Virtual
Date: Monday, July 19th, 2021
Time: 5:00 PM(EDT)
Number: P1GT011
Abstract ID:952
Candidate for Awards:None

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