*4.1. Sampling and DNA Extraction*

The three *Utricularia amethystina* morphotypes were collected from natural populations geographically close to each other (~2.8 km between purple and white; 0.2 km between white and yellow; and 2.82 km between purple and yellow). The samples were preserved in silica gel and stored at room temperature. Vouchers were deposited at Universidade Estadual Paulista (UNESP) in the Herbarium JABU (Table S1). The total genomic DNA was extracted from approximately 0.1 μg of flowers with Qiagen DNeasy Plant Mini extraction kit (Qiagen, Hilden, Germany) following manufacturer's protocol. The quality and quantity of DNA were estimated with Nanodrop 2000 (Thermo Scientific, MA, USA) and Qubit fluorometer (Life Technologies, CA, USA), respectively.
