Selection for yield in elephant-grass forage genotypes using GGE Biplot analysis
Seleção para produtividade em genótipos forrageiros de capim-elefante utilizando análise de GGE Biplot
Palavras-chave:
Cenchrus purpureus (Schumach.) Morrone, Dry matter yield, Genotype × Environment interaction, Stability, YieldResumo
Elephant grass is among the most used forages in intensive animal production systems due to its high productive potential, carrying capacity and nutritional quality. Because of the existing interaction between genotypes and environments, it is essential to select and develop materials that are not only high-yielding but also adaptable and stable. In this context, this study was developed to analyze the performance and select genotypes of elephant grass simultaneously for dry matter yield, performance stability and adaptability. Fifty-three elephant grass genotypes with forage potential were evaluated in four environments (rainy and dry seasons in years 1 and 2), defined according to the time at which the harvests occurred. A randomized-block design with two replicates was adopted. Dry matter yield (t.ha-1) was measured at each assessment (harvest). Adaptability and genotypic stability were evaluated using the GGE biplot methodology and R software. In the overall classification, genotypes 53, 22, 29, 17 and 33 showed the best average performance. Regarding dry matter yield, adaptability and phenotypic stability, genotype 53 was classified as the ideotype.
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Referências
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