caa a22 4500 477039448 CHVBK 20180405111313.0 cr unu---uuuuu 170330e19960301xx s 000 0 eng 10.1007/BF00989064 doi (NATIONALLICENCE)springer-10.1007/BF00989064 Nonrandom mating in Discaria americana ( Rhamnaceae ) [Elektronische Daten] [Diego Medan, Viviana Vasellati] Nonrandom mating takes place when seed paternity differs from that produced by random success of available pollen. To test if some form of this phenomenon operates in the self-incompatible perennialDiscaria americana, we performed one-donor hand pollinations involving seven individuals, and measured pollen-tube performance and seed viability and germination. A significant level of heterogeneity in reproductive traits was present in our sample. Mating was nonrandom as a consequence of complete self-incompatibility (intrafloral and geitonogamous pollinations were unsuccessful) linked with partial cross-compatibility (some inter-individual pollinations consistently failed to produce offspring while other parental combinations were fecund). Pollen tubes of successful pollen parents exhibited higher growth rate than those of infecund ones. Stylar-ovarian inhibition of incompatible pollen tubes and a wet stigma type suggests that a gametophytic incompatibility system operates in the species. Springer-Verlag, 1996 Rhamnaceae nationallicence Discaria nationallicence Nonrandom mating nationallicence pollen nationallicence reproductive biology nationallicence Medan Diego Cátedra de Botánica, Facultad de Agronomía de la U.B.A., Avda. San Martín 4453, RA-1417, Buenos Aires, Argentina aut Vasellati Viviana Cátedra de Botánica, Facultad de Agronomía de la U.B.A., Avda. San Martín 4453, RA-1417, Buenos Aires, Argentina aut Plant Systematics and Evolution Springer-Verlag 201/1-4(1996-03-01), 233-241 0378-2697 201:1-4<233 1996 201 606 https://doi.org/10.1007/BF00989064 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00989064 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Medan Diego Cátedra de Botánica, Facultad de Agronomía de la U.B.A., Avda. San Martín 4453, RA-1417, Buenos Aires, Argentina aut NATIONALLICENCE 700 1- Vasellati Viviana Cátedra de Botánica, Facultad de Agronomía de la U.B.A., Avda. San Martín 4453, RA-1417, Buenos Aires, Argentina aut NATIONALLICENCE 773 0- Plant Systematics and Evolution Springer-Verlag 201/1-4(1996-03-01), 233-241 0378-2697 201:1-4<233 1996 201 606 Metadata rights reserved Springer special CC-BY-NC licence nationallicence SWISSBIB 477038751 BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer