Genetic analyses, phenotypic adaptability and stability in sugarcane genotypes for commercial cultivation in Pernambuco.
In the present study, we assessed the agro-industrial performance of 22 sugarcane genotypes adaptable to edaphoclimatic conditions in production microregions in the State of Pernambuco, Brazil, and we recommended the commercial cultivation of select genotypes. The variables analyzed were as follows: sucrose percentage in cane juice, tonnage of saccharose per hectare (TPH), sugarcane tonnage per hectare (TCH), fiber, solid soluble contents, total recoverable sugar tonnage (ATR), and total recoverable sugar tonnage per hectare (ATR t/ha). A randomized block design with 4 repeats was used. Combined variance of the experiments, genetic parameter estimates, and environment stratification were analyzed. Phenotypic adaptability and stability were analyzed using the Annicchiarico and Wricke methods and analysis of variance. Genetic gain was estimated using the classic index and sum of ranks. Genotype selection was efficient for TPH, TCH, and ATR t/ha. Genotypes presented a great potential for improvement and a similar response pattern in Litoral Norte and Mata Sul microregions for TPH and TCH and Litoral Norte and Litoral Sul microregions for ATR t/ha. Genotypes SP78-4764, RB813804, and SP79-101 showed better productivity and phenotypic adaptability and stability, according to the Wricke and Annicchiarico methods. These genotypes can be recommended for cultivation in the sugarcane belt in the State of Pernambuco.
Unidade Acadêmica de Ciências Agrárias (Campus Pombal), Universidade Federal de Campina Grande, Pombal, PB, Brasil.
J A
JA
Dutra Filho
Departamento de Genética, Universidade Federal de Pernambuco, Recife, PE, Brasil.
T C
TC
Junior
Estação Experimental de Cana-de-açúcar do Carpina, Universidade Federal Rural de Pernambuco, Recife, PE, Brasil.
D E
DE
Simões Neto
D000220:Adaptation, Biological; D001938:Brazil; D004777:Environment; D059647:Gene-Environment Interaction; D005838:Genotype; D010641:Phenotype; D031786:Saccharum / Q000235:genetics*