Abstract
This work aimed to study the genetic variability, to estimate genetic and phenotypic parameters predict genetic values, establishing genetic correlations between characters and construirum selection index of individuals of guarana (Paullinia cupanavar. Sorbilis) in an experiment conducted in Maues, Amazonas. Thirty eseis progenies were evaluated for 10 morphological characteristics, including resistance to anthracnose disease and witches and fruit production in three consecutive years in experimental design of randomized blocks with two replications and six plants per plot. The variance components, and genetic and phenotypic parameters were estimated by the procedure REML / BLUP. There phenotypic and genetic variability among progenies for fruit production, which can be exploited in the breeding program. The genetic gains obtained in this study indicate a larger gain than the clonal selection. The selection of individuals for seed production and composition of the population of improvement should be evaluated for four more years. This work aimed to study the genetic variability, to estimate genetic and phenotypic parameters and predicting breeding values of individuals of guarana (Paullinia cupana var. Sorbilis) in an experiment conducted in Maues, Amazonas. Thirty-six families were evaluated for 10 morpho-agronomic characters, including resistance to anthracnose disease and witches and fruit production in three consecutive seasons, an experimental design of randomized blocks with two replications and six plants per plot. The variance components, and genetic and phenotypic parameters were estimated by the procedure REML / BLUP. The strategy of selecting progenies involving all morpho-agronomic traits proved to be more efficient in regard to genetic gains of 100% and should be adopted in the breeding program of guarana. Moreover, the selection of individuals to seed production and breeding population composition must be further evaluated for over four years since the present genetic gain, ranging from 1.38% to 2.58% did not allow taking a safe decision.
Highlights
No guaranazeiro, o ciclo de melhoramento, que compreende a seleção de genitores, seleção de indivíduos para reprodução sexuada e reprodução assexuada, obtenção de sementes de polinização aberta e recomendação de clones para plantio em escala comercial, pode demorar de 20 a 30 anos
plants as part of an experiment conducted in Maués
Thirty-six half sib progenies were evaluated according to ten morpho-agronomic characteristics
Summary
Resumo: Este trabalho teve como objetivos estudar a variabilidade genética, estimar parâmetros genéticos e fenotípicos, predizer valores genéticos, estabelecer correlações genéticas entre os caracteres e construir um índice de seleção dos indivíduos de guaranazeiro (Paullinia cupana var. sorbilis) num experimento conduzido em Maués, Amazonas. Resumo: Este trabalho teve como objetivos estudar a variabilidade genética, estimar parâmetros genéticos e fenotípicos, predizer valores genéticos, estabelecer correlações genéticas entre os caracteres e construir um índice de seleção dos indivíduos de guaranazeiro Trinta e seis progênies foram avaliadas para 10 caracteres morfoagronômicos, incluindo resistência às doenças antracnose e superbrotamento e produção de frutos, em três safras consecutivas, num delineamento experimental de blocos ao acaso, com duas repetições e seis plantas por parcela. Existe variabilidade fenotípica e genética entre as progênies para a produção de frutos, que pode ser explorada no programa de melhoramento. A seleção de indivíduos para produção de sementes e composição da população de melhoramento deve ser avaliada por mais quatro anos. PALAVRAS-CHAVE: Variabilidade genética, Melhoramento genético, Índice de seleção, Ganho genético
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
