Identification of sorghum hybrids with high phenotypic stability using GGE biplot methodology

Area of Science:

• Agronomy
• Plant Breeding
• Agricultural Science

Background:

• Identifying high-performing and stable sorghum hybrids is crucial for Brazilian agriculture.
• Environmental variability significantly impacts crop yield and stability.

Purpose of the Study:

• To identify grain sorghum hybrids exhibiting both high yield and phenotypic stability in Brazilian environments.
• To assess sorghum genotype adaptability and stability across different agro-ecological zones.

Main Methods:

• Conducted seven field trials across Brazil using a randomized complete block design.
• Evaluated 20 pre-commercial sorghum hybrids and five commercial checks.
• Employed the genotype main effects + genotype environment interaction (GGE) biplot analysis to assess adaptability and stability.

Main Results:

• GGE biplot analysis revealed significant genotype x environment interactions, allowing for grouping of environments.
• Two distinct environmental groups were identified based on sorghum performance.
• BRS 308 and 1G282 genotypes demonstrated superior grain yield, adaptability, and phenotypic stability.

Conclusions:

• BRS 308 is recommended for the first group of environments (Água Comprida-MG, Montividiu-GO, Vilhena-RO).
• 1G282 is recommended for the second group of environments (Guaíra-SP, Sete Lagoas-MG).
• These findings provide valuable insights for sorghum breeding programs and farmers in Brazil.