Bibliographic citations
Diaz, F., (2022). Desarrollo de poblaciones híbridas de Camote (Ipomoea batatas L.) y optimización de selección en etapas avanzadas de mejoramiento [Universidad Nacional Agraria La Molina]. https://hdl.handle.net/20.500.12996/5534
Diaz, F., Desarrollo de poblaciones híbridas de Camote (Ipomoea batatas L.) y optimización de selección en etapas avanzadas de mejoramiento []. PE: Universidad Nacional Agraria La Molina; 2022. https://hdl.handle.net/20.500.12996/5534
@phdthesis{renati/1115791,
title = "Desarrollo de poblaciones híbridas de Camote (Ipomoea batatas L.) y optimización de selección en etapas avanzadas de mejoramiento",
author = "Diaz Trujillo, Federico Celedonio",
publisher = "Universidad Nacional Agraria La Molina",
year = "2022"
}
The present study was divided in tow chapter. The objectives of the chapter one was to determine genetic diversity of two OFSP populations (PJ and PZ) relative to mega-clones (MCs) using agronomic traits, SSRs markers and to determine whether PJ and PZ are mutually heterotic. Field trials were performed for PJ (N = 49), PZ (N = 31), MC (N = 21), and H0 (N = 6898). Traits recorded were storage root yield (RYTHA), number of commercial roots per plant, foliage yield, biomass, harvest index, and dry matter (RDM), β-carotene (RBC), protein, starch, sucrose, iron, zinc, and calcium content of roots. Sixty-six pairs of SSR primers were used to determine molecular diversity. New genetic variation was found in PJ and PZ (e.g. RDM ≥ 29% with RBC ≥ 25 mg 100g−1 dwb). The SSR marker data clearly separated PJ and PZ into two gene-pools, together covering nearly the entire MC molecular diversity. Average RYTHA in H0 was high (40.7 t ha−1) with average heterosis increment of 21.8% and range −30.6% to 139.4%. The objectives of the chapter two were to examine the potential to combine yield with high root DM and high root β-carotene (BC) content by variance-covariance analysis and optimization of breeding scenarios for “OFSP dry and starchy”. The unique data were used to estimate variance components and correlations among four yield traits and four quality traits. For RYTHA the recommended optimized two-stage selection increased the response relative to the Standard (one-stage selection 100%) to 141.6% for 2268 plots and to 189.1% for 540 plots; the corresponding optimized three-stage selection increased the response to 144.3% for 2268 plots and to 190.5% for 540 plots.
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