IFAB   27864
INSTITUTO DE INVESTIGACIONES FORESTALES Y AGROPECUARIAS BARILOCHE
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
First multi-trial evaluation of yield in Festuca pallescens populations in Patagonia, Argentina
Autor/es:
NAGAHAMA N; MARCHELLI, P; LÓPEZ, A.S.; BEIDER, A; APARICIO AG
Reunión:
Simposio; FIRST PLANT BREEDING SYMPOSIUM; 2021
Institución organizadora:
INTA
Resumen:
OBJECTIVE: North Patagonian rangelands have been affected by desertification and overgrazing, leading to their deterioration and decreasing productivity. The strategies to mitigate these negative impacts include the domestication and breeding of key native species, such as Festuca pallescens (St. Yves) Parodi. This study aimed to characterize the relative performances (GxE interactions) in growth and seed production of F. pallescens populations under different common garden conditions.MATERIALS AND METHODS: Based on previous studies, we selected ten populations of F. pallescens and installed 600 plants per trial in randomized block designs in three different environments of Patagonia, Argentina: Bariloche, Esquel and Trelew. We measured tussock diameter as a proxy of biomass production, synflorescence production, and seed-producing plants within the first three years post-germination. We analyzed the variance using generalized linear mixed models, with the two main factors (site and population) and their interaction as fixed effects.RESULTS: In Trelew, survival was only 35%, therefore we only included the data of tussock diameter in the first year where GxE interaction was significant (F= 2.19; p= 0.002). In the second and the third year, analyses were done only in Bariloche and Esquel, being all interactions significant; nevertheless, the ranking of populations between sites slightly differed. In the second year, most populations produced more synflorescences (F=17.87; p