Genotype � Environment Interactions for Oil Content in Peanut and Stable High-Oil-Yielding Sources

P. Janila et al., 'Genotype � Environment Interactions for Oil Content in Peanut and Stable High-Oil-Yielding Sources', Crop Science, vol. 56(5), pp.2506-2515, Wiley, 2016

Peanut (Arachis hypogaea L.) genotypes withsuperior and stable agronomic performanceand high oil content were identified from testingof 160 advanced breeding lines over six seasons.The study revealed significant genotypeand genotype ? environment (G ? E) interactiondetermining oil and protein content; shellingoutturn; and pod, kernel, and oil yield in peanut.The variability among genotypes was highacross the environments for pod yield (546?7382 kg ha?1), oil yield (301?2742 kg ha?1), oilcontent (37?60%), 100-seed weight (21?127 g),and protein content (19?31%). The GGE biplottechnique revealed that ICGV 05155 is a stablegenotype for oil yield with an average oil yieldof 1886 kg ha?1. ICGV 05155 recorded highestaverage pod yield of 4928 kg ha?1, kernel yieldof 3420 kg ha?1, and oil content of 55.1%. ICGV06049, ICGV 06041, ICGV 06420, and ICGV03043 were other genotypes with stable oil yield.Simple regression showed significant contributionsof oil content (18?54%), and kernel yield(92?99%) to oil yield across the environments.Simultaneous improvement of kernel yield andoil content is feasible in breeding programs, askernel yield had no negative association with oilcontent. The high oil content genotypes, ICGV05155, ICGV 06049, ICGV 06041, ICGV 06420,and ICGV 03043, with stable oil yield were promotedto multilocation adaptive trials requiredfor their release for cultivation and used as parentsin breeding programs and development ofmapping population to identify quantitative traitloci (QTL) governing oil content