Interação genótipo x ambiente para produção de grãos e podridões de colmo em milho

• Ano de defesa: 2014
• Autor(a) principal: Takahashi, Alexandre [UNESP]
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Estadual Paulista (Unesp)
• Palavras-chave em Português: Milho; Adaptação (Biologia); Estabilidade; Genetica vegetal; Plantas - Melhoramento genetico; Adaptation
• Link de acesso: http://hdl.handle.net/11449/122010

The differential behavior of a group of genotypes at different environments is due to the interaction between genotypes and environment. These interactions are widely studied, because its understanding can distinguish the environments for experimentation, by gathering similar environments and also to identify environments that can lead the genotype to express more or less its main phenotypes. Furthermore, the comprehension of the interaction it is important to calibrate the methods for selection of superior genotypes: stables one, or with specific or wide adaptability. Therefore, our objective was to evaluate the results of yield and stalk rots of 36 corn genotypes at 22 locations during the season 2012/2013. All the experiments are part of the Dow AgroSciences evaluation fields. Stratification formed 24 groups for yield and 21 for stalk rot. The interaction was mainly of the complex type for both traits. Analyzing both methods at the same time 3 environments pair (1,03%) could be reduced for yield and 10 pairs (4,33%) for stalk rot. This low location reduce capacity, shows the low similarity between locations and is an indication of the efficiency of the locations for corn selection. The most stable, with wide adaptability and highest yield were the genotypes: HE 30 PW, HE12PW and HE22PW. The most stable, with wide adaptability lowest stalk rot were: HE31PW, HE16PW and HE17PW. The Scott-Knott test showed that the genotypes with no significant difference to the checks in a higher number of locations for yield were: HE 28PW, HE 10PW, HE 02PW, HE 29PW and HE 16PW. For Stalk Rot the genotypes were: HE 29PW, HE 27PW, HE 16PW, HE 08PW and HE 02PW