Physiological Analysis of Growth and Yield Variation in Groundnut (Arachis hypogaea L.)
The experiment was conducted during Summer 2016 at experimented field of Oilseed Research Unit, Dr. PDKV, on twenty four different groundnut genotypes of different habit group (Spanish, Virginia and Valencia). The experiment was laid out in Randomized Block Design in three replications. The physiological and growth parameter like leaf area, total dry matter production, RWC% and total chlorophyll content was recorded periodically. The yield and yield attributes were recorded at harvest replication and treatment wise. The significant differences among the genotypes was observed for total dry matter production, crop growth rate (CGR), relative growth rate (RGR), net assimilation rate (NAR) and absolute growth rate (AGR) at various stages of growth played an important role in yield determining processes. The values of these growth parameter increased between 60 and 80 DAS and declined thereafter towards maturity. The genotype AK 303 recorded highest CGR. The genotype TAG 24 recorded significantly higher and genotype JL 776 recorded lower RGR. The genotype AK 350 recorded maximum and genotype Chico recorded lower AGR. The genotype TAG 24 and AK 335 recorded highest NAR at reproductive stage and also higher in yield production. The genotype TAG 24 and AK 335 recorded highest no. of pod per plant and genotype AK 303 recorded lowest no. of pod per plant. The genotype AK 303 recorded highest 100- kernel weight. The highest dry pod yield was recorded by the genotypes TAG 24 and AK 335. These studies will be helpful in determination of physiological traits responsible for yield of groundnut.
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