@misc{10481/107834,
year = {2025},
month = {11},
url = {https://hdl.handle.net/10481/107834},
abstract = {Outbreeding response, the phenotypic differences observed between selfed parental lines and their outcrossed offspring,
can influence the evolution of selfing strategies. However, such effects remain poorly understood in noncrop species. We
explored the phenotypic outbreeding response variation across ploidy levels in Erysimum incanum, a predominantly selfing
plant complex with diploid, tetraploid, and hexaploid populations distributed across the Iberian Peninsula and Morocco. We
performed controlled within-population crosses to generate offspring with varying heterozygosity levels across ploidy types.
We quantified individual, flower, and reproductive traits, and we estimated fitness components, and assessed trait modularity
and phenotypic integration to see how heterozygosity affects trait coordination. Tetraploids showed the strongest and most
consistently positive outbreeding responses, particularly in gamete production. Trait-specific outbreeding responses were
positively associated with fitness across ploidy levels. Increasing heterozygosity was linked to a reduction in phenotypic integration, suggesting a loosening of trait correlations. Results show that outbreeding response is ploidy-dependent and functionally connected to fitness and it may act as a selective force promoting outcrossing in highly inbred lineages. We suggest
that outbreeding response is a dynamic and evolvable trait, with implications for mating system transitions and diversification in selfing plant populations.},
organization = {Organismo Autónomo de Parques Nacionales (globalHybrids 2415/2017)},
organization = {Ministerio de Ciencia, Innovación y Universidades (OUTevolution PID2019-111294GB-I00; Meenerva PID2022-139405OB-I00)},
organization = {Comisión Europea (Marie Skłodowska-Curie Action Cofund 2016, Athenea3i 754446)},
organization = {Universidad de Granada–Banco Santander (FPU 2021)},
publisher = {British Ecological Society},
keywords = {Erysimum incanum},
keywords = {heterosis},
keywords = {Mating systems},
title = {Effects of Ploidy on Relationship Between Outbreeding Response and Fitness in a Plant Selfing Species},
doi = {10.1002/ece3.72437},
author = {Olmedo Castellanos, Carlos and García Muñoz, Ana and Ferrón, Camilo and Bakkali, Mohammed and Muñoz Pajares, A. Jesús and Abdelaziz Mohamed, Mohamed},
}