Resumen de Heterosis and agronomic performance of raspberry families
Aurelio Hernández Bautista, Ricardo Lobato Ortiz, José Apolinar Mejía Contreras, José de J. García Zavala, Alba Melissa Castañeda Villa, José Luis Chávez Servia, Mario Rocandio Rodríguez, Ana Lidia Hernández Bautista, Geremias Rodriguez Bautista
Objective: To study the heterosis and agronomic performance of raspberry (Rubus idaeus) F1 families derived from open-pollinated parents, and to investigate the heterotic relationships between yield and its components.
Design/methodology/approach: A total of thirty-five genotypes, including eight open-pollinated raspberry cultivars, their 28 F1 families and one check, were evaluated for vegetative and fruit traits. The trial was carried out under a randomized block design and under open field conditions.
Results: Mid-parent heterosis (MH) ranged from -94.83 to 311.67 %, whereas the better parent heterosis (BPH) values varied from -94.26 to 235.00 %. We observed that the heterosis values for yield had a strong and positive correlation (r = 0.89) with the heterosis values for number of fruits per plant.
Limitations on study/implications: Heterosis and performance of F1 families in raspberry would depend on the pedigree of parents as their relativeness is a key factor to exploit the heterosis in plants.
Findings/conclusions: High values of heterosis were found in some raspberry crosses. Progeny derived from parents MU1 and TD865 showed considerable mid-parent heterosis (MH) and good performance for fruit size-related traits, soluble solids content and yield, evidencing that both parents may be utilized as donor parents in raspberry breeding program.
