Genetic association studies for yield and yield contributing traits in Plantago ovata Forsk.

Abstract

Twenty four accessions of Plantago ovata were grown to study existing variability, correlation and cause and effect relationships between yield and its component traits with their possible view in future improvement programmes. Analysis of variances displayed highly significant differences among accessions for all the traits. High heritability (>75%) coupled with the high genetic advance (>30%) were observed for the traits viz., leaf width, number of spikes/plant, biological yield/plant and seed yield/plant suggesting predominance of additive gene action. Seed yield/plant exhibited highly significant and positive correlation with biological yield/plant followed by number of spikes/plant, effective tillers/plant, harvest index, seed weight/spike, spike weight and husk recovery both at genotypic and phenotypic level. Biological yield/plant, harvest index, spike weight, effective tillers/plant and husk recovery exhibited the highest positive and significant direct effect on seed yield/plant. Critical analysis of results obtained from character association and path analysis indicated that the traits viz., biological yield/plant, harvest index, spike weight, effective tillers/plant and husk recovery were of prime concern as they possessed high positive association and direct effects on seed yield/plant. These traits are more reliable for selection for yield improvement programmes in Plantago ovata.

Keywords

• plantago ovata
• correlation
• heritability
• path coefficient analysis