TY  - JOUR
A1  - Lozada Gobilard, Sissi Donna
A1  - Weigend, M.
A1  - Fischer, E.
A1  - Janssens, S. B.
A1  - Ackermann, M.
A1  - Abrahamczyk, Stefan
T1  - Breeding systems in Balsaminaceae in relation to pollen/ovule ratio, pollination syndromes, life history and climate zone
JF  - Plant biology
N2  - Pollen/ovule (P/O) ratios are often used as proxy for breeding systems. Here, we investigate the relations between breeding systems and P/O ratios, pollination syndromes, life history and climate zone in Balsaminaceae. We conducted controlled breeding system experiments (autonomous and active self-pollination and outcrossing tests) for 65 Balsaminaceae species, analysed pollen grain and ovule numbers and evaluated the results in combination with data on pollination syndrome, life history and climate zone on a phylogenetic basis. Based on fruit set, we assigned three breeding systems: autogamy, self-compatibility and self-incompatibility. Self-pollination led to lower fruit set than outcrossing. We neither found significant P/O differences between breeding systems nor between pollination syndromes. However, the numbers of pollen grains and ovules per flower were significantly lower in autogamous species, but pollen grain and ovule numbers did not differ between most pollination syndromes. Finally, we found no relation between breeding system and climate zone, but a relation between climate zone and life history. In Balsaminaceae reproductive traits can change under resource or pollinator limitation, leading to the evolution of autogamy, but are evolutionary rather constant and not under strong selection pressure by pollinator guild and geographic range changes. Colonisation of temperate regions, however, is correlated with transitions towards annual life history. Pollen/ovule-ratios, commonly accepted as good indicators of breeding system, have a low predictive value in Balsaminaceae. In the absence of experimental data on breeding system, additional floral traits (overall pollen grain and ovule number, traits of floral morphology) may be used as proxies.
KW  - Annual
KW  - autogamy
KW  - cleistogamy
KW  - evolution
KW  - fly pollination
KW  - Impatiens
KW  - outcrossing
KW  - perennial
KW  - self-incompatibility
KW  - temperate
KW  - tropical
Y1  - 2018
U6  - https://doi.org/10.1111/plb.12905
SN  - 1435-8603
SN  - 1438-8677
VL  - 21
IS  - 1
SP  - 157
EP  - 166
PB  - Wiley
CY  - Hoboken
ER  - 
TY  - JOUR
A1  - Sicard, Adrien
A1  - Lenhard, Michael
T1  - The selfing syndrome  a model for studying the genetic and evolutionary basis of morphological adaptation in plants
JF  - Annals of botany
N2  - Background In angiosperm evolution, autogamously selfing lineages have been derived from outbreeding ancestors multiple times, and this transition is regarded as one of the most common evolutionary tendencies in flowering plants. In most cases, it is accompanied by a characteristic set of morphological and functional changes to the flowers, together termed the selfing syndrome. Two major areas that have changed during evolution of the selfing syndrome are sex allocation to male vs. female function and flower morphology, in particular flower (mainly petal) size and the distance between anthers and stigma.
 Scope A rich body of theoretical, taxonomic, ecological and genetic studies have addressed the evolutionary modification of these two trait complexes during or after the transition to selfing. Here, we review our current knowledge about the genetics and evolution of the selfing syndrome.
 Conclusions We argue that because of its frequent parallel evolution, the selfing syndrome represents an ideal model for addressing basic questions about morphological evolution and adaptation in flowering plants, but that realizing this potential will require the molecular identification of more of the causal genes underlying relevant trait variation.
KW  - Evolution
KW  - selfing syndrome
KW  - autogamy
KW  - pollen-to-ovule ratio
KW  - flower size
KW  - herkogamy
KW  - quantitative trait loci
KW  - self-incompatibility
Y1  - 2011
U6  - https://doi.org/10.1093/aob/mcr023
SN  - 0305-7364
SN  - 1095-8290
VL  - 107
IS  - 9
SP  - 1433
EP  - 1443
PB  - Oxford Univ. Press
CY  - Oxford
ER  -