Genotype X envionment interactions of groundnut (Arachis hypogaea L.) for pod yield

2018

English

Background Thirty-nine F7 new lines selected were evaluated alongside ten checks for pod yield, earliness, tolerance to diseases and other agronomic traits in the major and the minor seasons in 2014. The study locations were Fumesua in the forest ecological zone and Ejura in the forest-savanna transition ecological zone. The trials were laid out in lattice square (7 × 7) design with three replications. Results Genotype by environment interaction (G x E) was significant (p < 0.01) for pod yield. There were significant differences (p < 0.01) between the genotypes and locations for pod yield. Location main effects were the key cause of variation for pod yield/ha, pod yield/plot number of pods per plot, 100 pod weight and number of seeds per plot. Pod yields at Fumesua were better in both seasons due to better rainfall and distribution during the seasons. High positive correlation was observed between pod yield plant−1 and number of pods per plant (85.4%). Conclusion The observed variations due to location effects for all the traits studied revealed that the genetic expressions of these parameters were influenced by the prevailing environmental condition. Ten improved lines were selected for on-farm evaluation based on pod yield performance (1.3–1.5 ton/ha), tolerance to diseases and early maturity (89–92) days.

Asibuo, J. Y.; Forpoh, A. S.; Akromah, R.