GENETIC ANALYSIS OF YIELD, PHYSIOLOGICAL AND YIELD ATTRIBUTES IN RABI REDGRAM (Cajanas Cajan (L.) Millsp.)
Loading...
Files
Date
2013
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
ACHARYA N. G. RANGA AGRICULTURAL UNIVERSITY RAJENDRANAGAR, HYDERABAD
Abstract
The present investigation was undertaken in redgram (Cajanus cajan (L.) Millsp.) to study the variability, heritability and genetic advance as per cent of mean, character association, path coefficient analysis and polymorphism studies using Random Amplified Polymorphic DNA (RAPD) markers during rabi, 2012. The experiment was laid out in Randomized Block Design with three replications at the Regional Agricultural Research Station, Tirupati and observations were recorded on 16 characters viz., days to flowering, days to maturity, plant height, number of primary branches per plant, number of secondary branches per plant, pod length, number of pods per plant, number of seeds per pod, 100-seed weight, harvest index, Relative Water Content, Specific Leaf Area, SPAD Chlorophyll Meter Reading, protein content, phenol content, seed yield per plant.
Analysis of variance indicated the existence of significant differences among the genotypes for all the characters. Among the 15 genotypes LRG-41 and ICP-15580 showed high mean performance for seed yield. Analysis of genetic parameters revealed higher phenotypic and genotypic coefficient of variation, heritability, genetic advance as per cent of mean for secondary branches per plant, pods per plant and seed yield per plant, indicating that simple selection could have relevance for grain yield improvement.
xiv
Correlation studies indicated that the characters pods per plant, harvest index, plant height, secondary branches per plant, days to flowering, days to maturity and primary branches per plant had significant positive correlation with seed yield per plant. Path coefficient analysis revealed high positive direct influence of pods per plant, harvest index and also days to flowering has positive indirect effects on seed yield via all the characters except pod length, RWC, SCMR, protein content. Pods per plant had positive indirect effects on seed yield via all the characters except pod length, 100-seed weight and SCMR where as harvest index also had positive indirect effects on seed yield via all the characters except 100-seed weight. Hence, selection for pods per plant and harvest index is suggested for the improvement of seed yield per plant in redgram.
The polymorphism studies using Random Amplified Polymorphic DNA (RAPD) marker analysis detected a high level of genetic variation among the 15 redgram genotypes. Based on diversity analysis using molecular markers hybridization programme may be initiated between the genotypes PRG-158, ICP-15225 and TRG-59 from cluster II and LRG-30 from cluster I in order to get transgressive segregants, since these genotypes showed maximum diversity among themselves besides high yielding performance at phenotypic level.
Description
Keywords
GENETIC, ANALYSIS, YIELD, PHYSIOLOGICAL, YIELD ATTRIBUTES, ABI REDGRAM