Growth Dynamics and Physiological Behaviour of Summer Groundnut (Arachis hypogaea L.) Genotypes Under Semi-Arid Conditions of Bundelkhand, Uttar Pradesh
DOI:
https://doi.org/10.59436/jsiane.v5i1.32.2583-2093Keywords:
Arachis hypogaea, Leaf Area Index, Net Assimilation Rate, Relative Growth Rate, dry matter partitioning, path coefficient analysis, summer groundnut, BundelkhandAbstract
20 bunch-type groundnut (Arachis hypogaea L.) genotypes were evaluated during the summer seasons of 2006 and 2007 at Rath, Hamirpur, Uttar Pradesh (25.5° N, 79.7° E) to study growth dynamics, physiological behaviour and traits contributing to groundnut yield. Experiments were laid out in a Randomized Block Design (RBD) with three replications. Growth indices Leaf Area Index (LAI), Net Assimilation Rate (NAR) and Relative Growth Rate (RGR) were computed from destructive harvests at 30, 60 and 90 days after sowing (DAS). Pooled ANOVA, path coefficient analysis and stepwise multiple regression were employed to identify key physiological drivers of groundnut yield. Significant genotypic variation was recorded for plant height, branching, dry matter accumulation and its partitioning among plant parts. Genotypes ICGV 93468 and ICGV 00298 exhibited superior LAI and NAR during the critical 30–60 DAS interval, indicating efficient source establishment and effective dry matter allocation to pods. Path analysis identified LAI at 60 DAS as the principal direct driver of groundnut yield. These genotypes are recommended for summer groundnut cultivation in the Bundelkhand region.
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