Evaluation of the effect of genotype-environment interaction on 19 sugarcane cultivars (Saccharum spp.) in Cienfuegos, Cuba

Abstract

When cultivars present a differential response to diverse edaphoclimatic conditions, it is necessary to have high performance and stable genotypes, as well as stability allows the genotype to adjust its productive capacity to the widest environmental variation. The objective of this work was to determine the genotype-environment interaction in 19 sugarcane cultivars in the locality of Cienfuegos, in the variable Pol percentage. The study was carried out in the experimental block of sugarcane, located in Espartaco, Palmira, Cienfuegos, belonging to the Territorial Station of Sugarcane Research (ETICA Centro Villa Clara). The design used was a completely randomized block with three replications on a sialitic Brown soil, in the strains of cane plant and first ratoon. It was obtained as a result that the month of December in the ratoon strain (C2M2) is the ideal environment, where the cultivar ‘C88-380’ presented high yield and phenotypic stability, ‘C91-356’ presented the lowest yield values and ‘C91-367’ was the most unstable. Two mega-environments are formed, where cultivars ‘C90-317’, ‘C86-12’, ‘C90-501’ and ‘C1051-73’ are represented by environments C1M1 and C1M2, as well as ‘C88-380’, ‘C89-372’, ‘C89-176’, ‘C89-148’ and ‘C86-56’ with most of the remaining environments, while ‘C91-356’, ‘C323-68’, ‘C86-165’, ‘C91-115’, ‘C90-530’, ‘C86-156’, ‘C91-367’, ‘C90-469’, ‘C89-250’ and ‘C86-251’ are not related to any specific environment.

Keywords

• mega-ambientes
• maduración
• estabilidad
• adaptabilidad
• variabilidad