Genetic architecture, biochemical underpinnings and ecological impact of floral UV patterning

Molecular Ecology
Marcus T BrockCynthia Weinig

Abstract

Floral attraction traits can significantly affect pollinator visitation patterns, but adaptive evolution of these traits may be constrained by correlations with other traits. In some cases, molecular pathways contributing to floral attraction are well characterized, offering the opportunity to explore loci potentially underlying variation among individuals. Here, we quantify the range of variation in floral UV patterning (i.e. UV 'bulls-eye nectar guides) among crop and wild accessions of Brassica rapa. We then use experimental crosses to examine the genetic architecture, candidate loci and biochemical underpinnings of this patterning as well as phenotypic manipulations to test the ecological impact. We find qualitative variation in UV patterning between wild (commonly lacking UV patterns) and crop (commonly exhibiting UV patterns) accessions. Similar to the majority of crops, recombinant inbred lines (RILs) derived from an oilseed crop × WI fast-plant® cross exhibit UV patterns, the size of which varies extensively among genotypes. In RILs, we further observe strong statistical-genetic and QTL correlations within petal morphological traits and within measurements of petal UV patterning; however, correlations between morphology...Continue Reading

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Citations

Jul 4, 2018·Frontiers in Plant Science·Jarrad R PrasifkaClay J Carter
Sep 19, 2020·Current Biology : CB·Matthew H KoskiTia-Lynn Ashman
May 25, 2021·Frontiers in Plant Science·Priscila TunesElza Guimarães

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