title: Differentiation in the status of self-incompatibility among Calibrachoa species (Solanaceae).
abstract: The overall status of self-incompatibility, as assessed by the rate of capsule-set after self-pollination, was investigated in the genus Calibrachoa (Solanaceae). Thirty-two species were surveyed using a total of 655 individuals collected in 102 different native populations in Argentina, Brazil, Mexico, and Uruguay. The rate of capsule-set in 278 voucher specimens collected from the same native habitats was also measured to obtain additional information to assess the degree of self-(in)compatibility. Only one species, Calibrachoa parviflora, was self-compatible (SC, autogamous) and the other 31 species were found to be self-incompatible (SI). A mixed population (SI and SC individuals in the same population) was not found. The differentiation of C. parviflora as an autogamous species is associated with a successful occupation of different (riparian) habitats within a larger range of geographic distribution compared to the rest of the species in the principally SI genus of Calibrachoa.
authors.affiliation: Faculty of Horticulture, Chiba University, 648 Matsudo, Chiba 271-8510, Japan. andot@midori.h.chiba-u.ac.jp
authors.forename: Tatsuya
authors.initials: T
authors.lastname: Tsukamoto
authors.forename: Toshio
authors.initials: T
authors.lastname: Ando
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Watanabe
authors.forename: Hisashi
authors.initials: H
authors.lastname: Kokubun
authors.forename: Goro
authors.initials: G
authors.lastname: Hashimoto
authors.forename: Ushio
authors.initials: U
authors.lastname: Sakazaki
authors.forename: Enrique
authors.initials: E
authors.lastname: Suárez
authors.forename: Eduardo
authors.initials: E
authors.lastname: Marchesi
authors.forename: Ken
authors.initials: K
authors.lastname: Oyama
authors.forename: Teh-Hui
authors.initials: TH
authors.lastname: Kao