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Abstract Detail

Genetics Section

Kenney, Amanda, M. [1], Juenger, Thomas, E. [1].

Genetic architecture of water-use-efficiency and other ecological traits in Ipomopsis aggregata.

Water-use efficiency (WUE), the ratio of photosynthesis to water loss through transpiration, is a critical physiological trait affecting plant growth and performance. WUE is an interesting trait from an evolutionary and ecological perspective because selection on WUE and other related ecological traits is environment-dependent. Additionally, their functional relationships and underlying genetics are not straight forward or well understood. Ipomopsis aggregata (Polemoniaceae) is an ideal species for studying the evolution of physiological variation because it grows across a large elevation gradient throughout multiple habitats. Using an experimental F2 hybrid population of I. aggregata, we performed a quantitative trait loci (QTL) mapping study to elucidate the genetic architecture of WUE and other ecological traits. Multiple QTL underlying WUE are identified. Additionally, some WUE QTL show co-localization with QTL for other traits, such as flowering time, indicating pleiotropy or genetic linkage may underlie functional relationships among WUE and other ecological traits.

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1 - University of Texas at Austin, Section of Integrative Biology, 1 University Station C0930, Austin, TX, 78712, USA

Ipomopsis aggregata
QTL mapping
water-use efficiency.

Presentation Type: Oral Paper:Papers for Sections
Session: 15
Location: 555A/Convention Center
Date: Monday, August 2nd, 2010
Time: 1:30 PM
Number: 15001
Abstract ID:482

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