Adaptabilidade e estabilidade fenotípica de clones de cana-de- açúcar

• Ano de defesa: 2017
• Autor(a) principal: MAGALHÃES, Talyta Amaral
• Orientador(a): SILVA, Gheysa Coelho
• Banca de defesa: DUTRA FILHO, João de Andrade, SILVA, José Wilson da
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal Rural de Pernambuco
• Programa de Pós-Graduação: Programa de Pós-Graduação em Melhoramento Genético de Plantas
• Departamento: Departamento de Agronomia
• País: Brasil
• Palavras-chave em Português: Melhoramento vegetal; Cana-de-açúcar; Genótipo; Adaptabilidade fenotípica; Estabilidade fenotípica
• Área do conhecimento CNPq: FITOTECNIA::MELHORAMENTO VEGETAL
• Link de acesso: http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/7058

For the recommendation of new cultivars the knowledge of the interaction genotype x environment (GxA) is essential, therefore, it allows to analyze the performance of the genotypes in different environment. The results of these tests are synthesized by studies of adaptability and phenotypic stability, which allows to know the productive capacity, the adaptation to the environmental variations and the production stability of the genotypes. The objective of this work was to evaluate the adaptability and phenotypic stability of RB genotypes of sugarcane by the AMMI (Additive Main Effects and Multiplicative Interaction Analysis) method. The experiments were conducted in five production units in the State of Pernambuco, in sugarcane plantations, soca and resoca, using 14 RB sugarcane genotypes, 11 RB clones from the 2004 series (G1 to G11) and three cultivars (G12 To G14) RB863129, RB867515 and BR92579 as controls. Each combination producing-cut unit was considered as an environment, totaling 13 environments. A randomized complete block design with four replications was used. The following variables were evaluated: tons of sugarcane per hectare (TCH) and tons of pol. Per hectare (TPH). The significant GxA interaction revealed changes in the classification of genotypes in response to environments. Genotype G12 showed general adaptability, phenotypic stability and high productivity for both variables. Genotypes G10, G13 and G14 showed higher yields, higher contribution to the interaction, indicating specific stability.