“Obtención de semilla F1 de arroz tipo índica (Oryza sativa L.) mediante hibridación simple, para crear poblaciones de genética diversa”.

VIII. SUMMARY The lack commercial varieties of rice (Oryza sativa L.), encourage to begin new breeding programs in Ecuador. Rice varieties of the subspecies indica, are the most preferred for consumption at the national level, of which were used in this study, with the aim of obtaining segregant F1 seeds of indica-type rice of superior genetics for the generation of new varieties. The trial was established in the sector of the CEDEGE Project, Valle Verde farm, canton Babahoyo, Los Ríos province. Fourteen indica rice cultivars from different countries were used, using reciprocal crosses. The varieties evaluated were: BA-100-UTB, BR-101-UTB, CA-102-UTB, FE-103-UTB, FI-104-UTB, FI-105-UTB, FI-106-UTB, FI-107 -UTB, SH-108-UTB, FL109-UTB, FL-110-UTB, G-111-UTB, G-112-UTB and G-113-UTB. The results showed that a total of 178 crosses were obtained and all the crosses produced seeds formed from the emasculated flowers. Using the linear regressions it was found that for every 100 emasculated flowers a total of 34 fertilized flowers were obtained. Likewise, for every 100 emasculated flowers a total of 25 harvested seeds were obtained. In this study, it is concluded that the progenitors Br-101-UTB and FI-105-UTB were those with the best behavior considering the evaluated variables. It is recommended to continue the study with the F1 populations of indica rice, to determine the agronomic and productive behavior of the crop through future generations until achieving a genetically improved material adapted to the Ecuadorian conditions. Keywords: Simple Hybridization, Indica Rice, Emasculation, Pollination, Fertilized Seeds.

• Auteur principal: Miguez Escobar, Zaida Sulay (author)
• Format: bachelorThesis
• Langue: spa
• Publié: 2017
• Sujets: Obtención; Semilla F1 de arroz; Hibridación simple
• Accès en ligne: http://dspace.utb.edu.ec/handle/49000/5040