11 RRJPRPC | Volume 9 | Issue 1 |March, 2020 Research & Reviews: Journal of Pharmacognosy and Phytochemistry e-ISSN:2321-6182 p-ISSN:2347-2332 Correlation And Path Coefficient Analysis For Yield, Yield Components And Water Use Efficiency Traits In Black gram Under Organic Fertilizer Management A. KAVITHA REDDY* 1 , M. SHANTHI PRIYA 2 , D. MOHAN REDDY 3 and B. RAVINDRA REDDY 4 1 Ph.D Scholar, Department of Genetics and Plant Breeding, S.V. Agricultural College, Tirupati- 517502, Andhra Pradesh, India 2 Principal Scientist, Department of Genetics and Plant Breeding, ARS, Perumallapalli - 517505, Andhra Pradesh, India 3 Principal Scientist, Department of Genetics and Plant Breeding, RARS, Tirupati- 517502, Andhra Pradesh, India 4 Associate Professor, Department of Statistics and Computer Applications, S.V. Agricultural College, Tirupati- 517502, Andhra Pradesh, India Research Article Received date: 27/10/2002 Accepted date: 21/11/2020 Published date: 28/11/2020 *For Correspondence A. Kavitha Reddy,S.V. Agricultural college, Tirupati. E-mail: appagari@gmail.com Keywords: Correlation, Path Analysis, Blackgram, organic fertilizer management. ABSTRACT Correlation and path co-effcient analysis was carried out for yield, yield component and water use effciency traits among 30 blackgram genotypes under organic fertilizer management. Correlation studies indicated that seed yield per plant showed highly signifcant and positive correlation with harvest index, followed by number of primary branches per plant, number of pods per plant. It exhibited signifcant negative correlation with SCMR (SPAD chlorophyll meter reading) at 35 DAS and SLA (Specifc leaf area) at 50 DAS at both phenotypic and genotypic levels. Path Analysis revealed that harvest index exhibited high and positive direct effect on seed yield per plant followed by number of pods per plant and number of primary branches per plant. SCMR (SPAD chlorophyll meter reading) at 35 DAS and SLA (Specifc leaf area) at 50 DAS plant exhibited low and negative direct effects on seed yield per plant. Hence selection based on these traits would be effective in increasing the seed yield and improving water use effciency. Opting for genotypes with low to moderate SLA (Specifc leaf area) readings and high SCMR (SPAD chlorophyll meter reading) at fowering stage would increase water use effciency under organic fertilizer management. INTRODUCTION Black gram (Vigna mungo L.) is an important short duration pulse crop grown in India. But the production of blackgram is low due to higher incidence of pests and diseases, moisture stress, poor fertilizer management etc [1]. Therefore, to bring about any improvement in this crop, the knowledge of association of yield with other yield component and water use effciency traits under organic fertilizer management will be of great signifcance. Correlation studies indicate the magnitude of association between pairs of characters and are useful for selecting genotypes with desirable combinations of characters thereby assist the plant breeder in crop improvement [2]. Hence, the knowledge of association of yield components with yield and among themselves and with water use effciency traits would be of great help to the breeder in obtaining improved yields under moisture stress conditions.