GENOTYPE-ENVIRONMENT INTERACTION ON THE SEED QUALITY OF MAIZE HYBRID PROGENITORS (Zea mays L.) | GENOTYPE-ENVIRONMENT INTERACTION ON THE SEED QUALITY OF MAIZE HYBRID PROGENITORS (Zea mays L.)

إنجليزي. The environmental conditions at the multiplication site have an impact on seed quality. Parents capable of counteracting changes in production environments are required to maintain and conserve the excellent attributes of maize (Zea mays L.) seed. This study sought to determine the effects of genotype and environment on the physical and physiological traits of single crosses and inbred lines, which are the progenitors of trilineal maize hybrids adapted to the High Valleys of Mexico. During the spring-summer 2014 and 2015 cycles, nine inbred lines, three single crosses, and three hybrids were evaluated in Coatlinchán, Celaya, and San Luis de la Paz, Mexico, in a randomized complete block design with three replications. The hectoliter and thousand-seeds weight, commercial seed percentage, standard germination, and after-cold test were evaluated. A pooled analysis of variance and multiple comparison of means with Tukey (p ≤ 0.05) were performed. The site regression model (SREG) was used to account for the genotype-environment interaction. The best environments for physical quality were San Luis de la Paz 2014; for a thousand-seeds weight (295.3 g), Coatlinchán 2015; for hectoliter weight (74.7 kg hL-1), Coatlinchán 2014; and for commercial seed percentage (76 and 73.3 %), San Luis de la Paz 2014. With the exception of Celaya 2014, the environments were statistically equal for physiological quality in standard germination, and San Luis de la Paz 2015 (82 %) was the best environment for germination after cold exposure. Regarding the genotype-environment interaction, parents M-47xM-46 and M-55xM-54 performed best for physical quality and M-43xM-44 for physiological quality at San Luis de la Paz; thus, seed production from these parents is possible in this location.

الأسبانية؛ قشتالية. The environmental conditions at the multiplication site have an impact on seed quality. Parents capable of counteracting changes in production environments are required to maintain and conserve the excellent attributes of maize (Zea mays L.) seed. This study sought to determine the effects of genotype and environment on the physical and physiological traits of single crosses and inbred lines, which are the progenitors of trilineal maize hybrids adapted to the High Valleys of Mexico. During the spring-summer 2014 and 2015 cycles, nine inbred lines, three single crosses, and three hybrids were evaluated in Coatlinchán, Celaya, and San Luis de la Paz, Mexico, in a randomized complete block design with three replications. The hectoliter and thousand-seeds weight, commercial seed percentage, standard germination, and after-cold test were evaluated. A pooled analysis of variance and multiple comparison of means with Tukey (p ≤ 0.05) were performed. The site regression model (SREG) was used to account for the genotype-environment interaction. The best environments for physical quality were San Luis de la Paz 2014; for a thousand-seeds weight (295.3 g), Coatlinchán 2015; for hectoliter weight (74.7 kg hL-1), Coatlinchán 2014; and for commercial seed percentage (76 and 73.3 %), San Luis de la Paz 2014. With the exception of Celaya 2014, the environments were statistically equal for physiological quality in standard germination, and San Luis de la Paz 2015 (82 %) was the best environment for germination after cold exposure. Regarding the genotype-environment interaction, parents M-47xM-46 and M-55xM-54 performed best for physical quality and M-43xM-44 for physiological quality at San Luis de la Paz; thus, seed production from these parents is possible in this location.