Genetic analysis of yield and its components in dual purpose oat
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Date
2015
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JNKVV
Abstract
ABSTRACT
The present study was based on “Genetic analysis of yield and its components in dual purpose oat ” conducted at Department of Plant Breeding and genetics, Jawaharlal Nehru Krishi Vishwa Vidyalaya, Jabalpur (M.P) with the objectives To estimate genetic variability for yield, its components and quality traits, to access inter relationship among observed traits, to workout direct and indirect effects of various characteristics on grain yield, to rank the genotype based on principal component analysis for combination of Phenotypic traits, to identify putative lines for dual purpose. The character i.e. peduncle length, spikelets per panicle , dry matter yield and grain yield exhibited high estimates of genotypic and phenotypic coefficient of variation, indicating the presence of considerable amount of genetic variability in the population. The character viz., number of leaves per plant, internodal length, peduncle length, panicle weight, axis branch number, spikelets per panicle, florets per panicle, dry matter yield,
1000 seed weight and green fodder yield had high heritability coupled with high genetic advance , indicating the predominance of additive gene action and selection based on these characters may be effective and revealed that sufficient improvement in fodder and seed yield can be achieved through selection of these traits. The character viz., number of leaves per plant, tillers per meter and dry matter yield indicates significant positive correlation with green fodder yield at phenotypic level and plant height, number of leaves per plant, penultimate leaf area, panicle weight, spikelets per panicle, florets per panicle and 1000 seed weight possessed high positive and significant correlation among seed yield, so selection of these traits are suitable for dual purpose yield improvement. From the present investigation it can be concluded that character viz., dry matter yield, penultimate leaf area and number of leaves per plant at phenotypic level possessed positive direct effects on green fodder yield. While, character viz., florets per panicle, plant height, number of leaves per plant, days to 50% flowering, axis length, days to maturity and dry matter yield at phenotypic level possessed positive direct effects on grain yield. So it could be inferred that these characters should be subjected for selection of genotypes with higher green
fodder and seed yield. On the basis of morphological, phenological and qualitative traits, PC scores which is present in different genotypes like EC209638, IC372425, IC372413, HFO-25, IC372442, IC372418, IC372432, IC372461, IC372419, IC372415, JHO-11, IC372414 and HFO-24 are on top thirteen rank. Among these top 5 genotypes are EC209638, IC372425, IC372413, HFO-25 and IC372442 .This study will help in understanding the diversity of genotypes and in the selection and improvement of desirable traits to be used or transferred during crossing programme. It will help to develop high yielding dual purpose oat varieties and breeding protocols for oat improvement.