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GENETIC EVALUATION OF SOME CROSSES OF RICE VARIETY SWARNA FOR YIELD AND ITS CONTRIBUTING TRAITS

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Title GENETIC EVALUATION OF SOME CROSSES OF RICE VARIETY SWARNA FOR YIELD AND ITS CONTRIBUTING TRAITS
 
Creator Mahilange, Naresh Kumar
 
Contributor Shrivastava, Rajeev
Nanda, H.C.
Tiwari, P.K.
Saxena, R.R.
 
Subject GENETIC EVALUATION, CROSSES, RICE, SWARNA
Genetics and Plant Breeding
 
Description The present experiment was conducted at Research cum Instructional farm of IGKV,
Raipur during Kharif 2010. The experimental material consists of thirty-five elite selections from
crosses of rice variety Swarna with some other varieties to incorporate gall midge resistance
and simultaneously to reduce the maturity duration, with same grain type as Swarna. In order
to identify elite plant type with desired characters different parameters of variability were
estimated for observed characters i.e. mean, range, phenotypic and genotypic variance,
phenotypic and genotypic coefficient of variances, heritability, genetic advance and genetic
advance as percentage of mean. Correlation among all the observed characters was also
estimate. To know the direct and indirect effects of all the observed characters on grain yield as
dependent characters grain yield path coefficient was analyzed. Multiple regression analysis
was carried out to find out the best character combinations with grain yield, as dependent
variables.
Presence of significant variability for all the observed characters as indicated by analysis
of variance revealed that direct selection will be useful to select elite line among the cross.
Selection based on plant height, days to maturity, number of tillers per plant, panicle
length, test weight of milled rice and head rice recovery percentage will be more reliable for the
improvement of rice due to major contribution of additive gene effect as indicated by high
heritability and genetic advance as percentage of mean.
High phenotypic and genotypic coefficient of variation with high genetic advance as
percentage of mean for plant height, number of tiller per plant, days to maturity and panicle
length indicated that mass selection can be practiced to improve the rice genotype.

Correlation analysis at genotype, phenotypic and environmental levels indicated that
grain yield could be increased significantly with the improvement of plant height, milling
percentage, kernel breadth, head rice recovery percentage and test weight.
Path analysis revealed that grain yield per hectare can be increased directly by selection
based on plant height, panicle length, number of tiller per plant, days to maturity and test
weight.
Multiple regression equation indicate the above analysis crosses 5, 19 and 27 showed
desirable types fitted with objectives. These genotypes were earlier screened against gall midge
resistance; therefore it is presumed that the progeny of these selections also carry the same
character. The maturity of Swarna is nearly 140 days. The selected lines 5, 19 and 27 having the
maturity duration between 126-130 days, which fulfill the second objective of study. Hence the
lines selected from crosses 5, 19 and 27 are having improvement over Swarna.
 
Date 2016-12-21T12:52:35Z
2016-12-21T12:52:35Z
2011
 
Type Thesis
 
Identifier 119 p.
http://krishikosh.egranth.ac.in/handle/1/91781
 
Language en
 
Format application/pdf
 
Publisher Indira Gandhi Krishi Vishwavidyalaya, Raipur