Banca de DEFESA: JOAMESON DOS SANTOS LIMA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : JOAMESON DOS SANTOS LIMA
DATA : 27/02/2020
HORA: 13:00
LOCAL: UNEMAT. Campus Universitário de Alta Floresta, Alta Floresta, MT.
TÍTULO:

Stability and adaptability of maize (Zea mays L.) hybrids in different environments in Northern of Mato Grosso and Southeast of Rondônia

PALAVRAS-CHAVES:

Grain productivity, genotype interaction by maize breeding environment, multi-site.

PÁGINAS: 72
GRANDE ÁREA: Ciências Agrárias
ÁREA: Agronomia
SUBÁREA: Fitotecnia
ESPECIALIDADE: Melhoramento Vegetal
RESUMO:

The identification of genotypes with high production potential and with broad stability and adaptability is one of the main targets of maize breeding programs (Zea mays). That is why, before being recommended to farmers, these genotypes are evaluated in multi-environmental tests. The objective of this work was to evaluate the adaptability and stability of corn hybrids in six environments in the North of Mato Grosso and Southeast of Rondônia. For this, 36 simple corn hybrids were evaluated in six environments, namely: Vilhena-RO, Sorriso-MT, Alta Floresta-MT, Carlinda-MT and Sinop-MT, since the latter was evaluated in two years of production (2017/2018 and 2018/2019), thus totaling six environments. The experiments were outlined in a square lattice (6x6) and in 2 repetitions. Each experimental plot was composed of two rows of four meters long, spaced 0.7 m apart, making a total of 144 experimental units (36x2x2). The PG was obtained by weighing the threshed grains from each plot, afterwards, the data were subjected to stand correction, from the analysis of covariance with correction for ideal stand, corrected to 13% humidity and converted to kg.ha-1. Stability and adaptability were assessed using the methods of Annicchiarico (1992), Lin & Binns (1988), Eberhart & Russel (1966) and AMMI using the Genes program and for the REML/Blup method, the Selegen software was used. There was a significant difference (p <0.01) for the effects of environments and GXA interaction. The Annichiarico methodology revealed the environments of Vilhena-RO, Sorriso-MT and Alta Floresta-MT as the favorable cultivation environments and the 1P2255 genotype with adaptability in all cultivation environments. The method proposed by Lin & Binns, on the other hand, revealed the genotypes DKB310, 1P2247, 1L1411, 1P2215, 1P2267 and 1M1782 showed adaptability to general environments. For the Eberhart & Russel method, the genotypes with high average grain yield, broad adaptability and high stability were 1O2112, 1P2203, 1P2184, 1P2212, 1P2255 and 1P2231. The AMMI method identified the 1P2255 genotype as more productive and also more adapted and stable for the evaluated environments. The REMEL / Blup methodology indicated the genotypes DKB310, 1P2247, 1L1411, 1P2255, 1P2215, 1P2214, 1M1782, 1P2267, DKB390, 1M1807, 1N1958, 1P2184 and 1P2231 as the most stable, adaptable and with the best productive performances. The methodologies of Annicchiarico, Eberhart & Russel, AMMI and REMEL/Blup showed similar results in the classification and recommendation of hybrids1P2255 with wide adaptability. However, there was a divergence in the indication of hybrids with specific adaptability to favorable and unfavorable environments.

MEMBROS DA BANCA:
Presidente - 32143004 - ANA APARECIDA BANDINI ROSSI
Interno - 985.174.497-20 - FLAVIO DESSAUNE TARDIN - UENF
Externo ao Programa - 285518001 - GUILHERME FERREIRA PENA
Externo à Instituição - ROBERTO DOS SANTOS TRINDADE - EMBRAPA