International Journal of Current Microbiology and Applied Sciences, 2022
In the present investigation, phenotypic and genotypic correlation coefficients were estimated am... more In the present investigation, phenotypic and genotypic correlation coefficients were estimated among 19 characters of 51 maize genotypes, to find out the association between grain yield and its contributing characters. Grain yield per plant significantly and positively correlated with plant height, ear height, number of kernels per row, number of kernels per ear, shelling percentage and test weight at genotypic and phenotypic basis. Observable correlations among different traits was confirmed through phenotypic correlation, actual correlation could be known through genotypic correlation only, which eliminates environmental influence. Genotypic correlation permits prediction of correlated response and evaluation of relative influence of one character on other. Genotypic correlation in particular is helpful in construction of selection indices.
Abstract: Parental diversity is considered desirable to exploit heterosis in any breeding program... more Abstract: Parental diversity is considered desirable to exploit heterosis in any breeding program. The present investigation was undertaken to search out whether any relationship existed between heterosis of cross combinations with phenetic divergence, combining ability and genetic divergence of parents in sesame. Seven sesame genotypes and their 21 cross combinations developed through half diallel mating were assessed for morphological markers, microsatellite markers and seed storage protein polymorphism to estimate different parameters. The clustering patterns of parents differed for morphological, protein and simple sequence repeats (SSRs), though some concordance was observed between phenetic and genetic divergence of parents. Heterosis, both mid-parent heterosis % (MPH%) and better parent heterosis % (BPH%), was positively and significantly correlated with specific combining ability and hybrids per se, but no specific trend transpired between morphological, protein and SSR mark...
International Journal of Scientific & Technology Research, 2013
Parental diversity is considered desirable to exploit heterosis in any breeding program. The pres... more Parental diversity is considered desirable to exploit heterosis in any breeding program. The present investigation was undertaken to search out whether any relationship existed between heterosis of cross combinations with phenetic divergence, combining ability and genetic divergence of parents in sesame. Seven sesame genotypes and their 21 cross combinations developed through half diallel mating were assessed for morphological markers, microsatellite markers and seed storage protein polymorphism to estimate different parameters. The clustering patterns of parents differed for morphological, protein and simple sequence repeats (SSRs), though some concordance was observed between phenetic and genetic divergence of parents. Heterosis, both mid-parent heterosis% (MPH%) and better parent heterosis% (BPH%), was positively and significantly correlated with specific combining ability and hybrids per se, but no specific trend transpired between morphological, protein and SSR marker data. How...
Twenty one indigenous and popular rice varieties of West Bengal, India including some aromatic ri... more Twenty one indigenous and popular rice varieties of West Bengal, India including some aromatic rice varieties were evaluated for 15 different grain quality parameters to assess genetic estimates of the traits and genetic divergence of varieties. Wide range of variation was observed in many traits offering scope for selection. Incorporation of gene from aromatic rice to other high yielding varieties stands out to be an important proposition for improving protein content in rice. The low difference between phenotypic and genotypic coefficient of variation have suggested less environmental influence on the genetic control of these quality parameters. Heritability was high for almost all the traits. Head rice recovery (HRR) and volume expansion ratio showed high GCV, PCV, GA with high heritability indicating that selection to be effective if based on these traits. Canonical analysis revealed that protein%, volume expansion ratio, kernel breadth before cooking, HRR% and kernel breadth af...
Sesame is an important ancient oilseed crop of high
medicinal value. In the present study, 37 cha... more Sesame is an important ancient oilseed crop of high medicinal value. In the present study, 37 characters including both quantitative and qualitative traits of sixty genotypes were characterized following IPGRI morphological descriptors for sesame. Multivariate analysis was computed to distinguish the varieties into different groups. Though thirty six microsatellite markers including genomic and Est-SSR markers were initially selected, but, finally, the accessions were genotyped by eight polymorphic primers. Altogether, 27 alleles were detected among the 60 genotypes, with an average of 3.37 alleles per locus. The number of alleles ranged from 2 to 6 alleles. From data of microsatellite markers, dissimilarity coefficients between varieties were computed following Jaccard’s coefficient method. Principal co-ordinate analysis was used to represent the varieties in bi-directional space. Dendrogram was constructed using NJ method based on dissimilarity matrix. Cluster analysis based on morphological and molecular marker classified sesame genotypes into two major groups. Mantel test showed an insignificant correlation between phenotypic and molecular marker information. The genotypes belonging to the same geographical area did not always occupy the same cluster. The results confirmed that both genetic and phenotypic diversity in a combined way could efficiently evaluate the variation present in different sesame accessions in any breeding program.
Sesame is an important ancient oilseed crop of high medicinal value. In the present study, 37 cha... more Sesame is an important ancient oilseed crop of high medicinal value. In the present study, 37 characters including both quantitative and qualitative traits of sixty genotypes were characterized following IPGRI morphological descriptors for sesame. Multivariate analysis was computed to distinguish the varieties into different groups. Though thirty six microsatellite markers including genomic and Est-SSR markers were initially selected, but, finally, the accessions were genotyped by eight polymorphic primers. Altogether, 27 alleles were detected among the 60 genotypes, with an average of 3.37 alleles per locus. The number of alleles ranged from 2 to 6 alleles. From data of microsatellite markers, dissimilarity coefficients between varieties were computed following Jaccard’s coefficient method. Principal co-ordinate analysis was used to represent the varieties in bi-directional space. Dendrogram was constructed using NJ method based on dissimilarity matrix. Cluster analysis based on morphological and molecular marker classified sesame genotypes into two major groups. Mantel test showed an insignificant correlation between phenotypic and molecular marker information. The genotypes belonging to the same geographical area did not always occupy the same cluster. The results confirmed that both genetic and phenotypic diversity in a combined way could efficiently evaluate the variation present in different sesame accessions in any breeding program.
International Journal of Current Microbiology and Applied Sciences, 2022
In the present investigation, phenotypic and genotypic correlation coefficients were estimated am... more In the present investigation, phenotypic and genotypic correlation coefficients were estimated among 19 characters of 51 maize genotypes, to find out the association between grain yield and its contributing characters. Grain yield per plant significantly and positively correlated with plant height, ear height, number of kernels per row, number of kernels per ear, shelling percentage and test weight at genotypic and phenotypic basis. Observable correlations among different traits was confirmed through phenotypic correlation, actual correlation could be known through genotypic correlation only, which eliminates environmental influence. Genotypic correlation permits prediction of correlated response and evaluation of relative influence of one character on other. Genotypic correlation in particular is helpful in construction of selection indices.
Abstract: Parental diversity is considered desirable to exploit heterosis in any breeding program... more Abstract: Parental diversity is considered desirable to exploit heterosis in any breeding program. The present investigation was undertaken to search out whether any relationship existed between heterosis of cross combinations with phenetic divergence, combining ability and genetic divergence of parents in sesame. Seven sesame genotypes and their 21 cross combinations developed through half diallel mating were assessed for morphological markers, microsatellite markers and seed storage protein polymorphism to estimate different parameters. The clustering patterns of parents differed for morphological, protein and simple sequence repeats (SSRs), though some concordance was observed between phenetic and genetic divergence of parents. Heterosis, both mid-parent heterosis % (MPH%) and better parent heterosis % (BPH%), was positively and significantly correlated with specific combining ability and hybrids per se, but no specific trend transpired between morphological, protein and SSR mark...
International Journal of Scientific & Technology Research, 2013
Parental diversity is considered desirable to exploit heterosis in any breeding program. The pres... more Parental diversity is considered desirable to exploit heterosis in any breeding program. The present investigation was undertaken to search out whether any relationship existed between heterosis of cross combinations with phenetic divergence, combining ability and genetic divergence of parents in sesame. Seven sesame genotypes and their 21 cross combinations developed through half diallel mating were assessed for morphological markers, microsatellite markers and seed storage protein polymorphism to estimate different parameters. The clustering patterns of parents differed for morphological, protein and simple sequence repeats (SSRs), though some concordance was observed between phenetic and genetic divergence of parents. Heterosis, both mid-parent heterosis% (MPH%) and better parent heterosis% (BPH%), was positively and significantly correlated with specific combining ability and hybrids per se, but no specific trend transpired between morphological, protein and SSR marker data. How...
Twenty one indigenous and popular rice varieties of West Bengal, India including some aromatic ri... more Twenty one indigenous and popular rice varieties of West Bengal, India including some aromatic rice varieties were evaluated for 15 different grain quality parameters to assess genetic estimates of the traits and genetic divergence of varieties. Wide range of variation was observed in many traits offering scope for selection. Incorporation of gene from aromatic rice to other high yielding varieties stands out to be an important proposition for improving protein content in rice. The low difference between phenotypic and genotypic coefficient of variation have suggested less environmental influence on the genetic control of these quality parameters. Heritability was high for almost all the traits. Head rice recovery (HRR) and volume expansion ratio showed high GCV, PCV, GA with high heritability indicating that selection to be effective if based on these traits. Canonical analysis revealed that protein%, volume expansion ratio, kernel breadth before cooking, HRR% and kernel breadth af...
Sesame is an important ancient oilseed crop of high
medicinal value. In the present study, 37 cha... more Sesame is an important ancient oilseed crop of high medicinal value. In the present study, 37 characters including both quantitative and qualitative traits of sixty genotypes were characterized following IPGRI morphological descriptors for sesame. Multivariate analysis was computed to distinguish the varieties into different groups. Though thirty six microsatellite markers including genomic and Est-SSR markers were initially selected, but, finally, the accessions were genotyped by eight polymorphic primers. Altogether, 27 alleles were detected among the 60 genotypes, with an average of 3.37 alleles per locus. The number of alleles ranged from 2 to 6 alleles. From data of microsatellite markers, dissimilarity coefficients between varieties were computed following Jaccard’s coefficient method. Principal co-ordinate analysis was used to represent the varieties in bi-directional space. Dendrogram was constructed using NJ method based on dissimilarity matrix. Cluster analysis based on morphological and molecular marker classified sesame genotypes into two major groups. Mantel test showed an insignificant correlation between phenotypic and molecular marker information. The genotypes belonging to the same geographical area did not always occupy the same cluster. The results confirmed that both genetic and phenotypic diversity in a combined way could efficiently evaluate the variation present in different sesame accessions in any breeding program.
Sesame is an important ancient oilseed crop of high medicinal value. In the present study, 37 cha... more Sesame is an important ancient oilseed crop of high medicinal value. In the present study, 37 characters including both quantitative and qualitative traits of sixty genotypes were characterized following IPGRI morphological descriptors for sesame. Multivariate analysis was computed to distinguish the varieties into different groups. Though thirty six microsatellite markers including genomic and Est-SSR markers were initially selected, but, finally, the accessions were genotyped by eight polymorphic primers. Altogether, 27 alleles were detected among the 60 genotypes, with an average of 3.37 alleles per locus. The number of alleles ranged from 2 to 6 alleles. From data of microsatellite markers, dissimilarity coefficients between varieties were computed following Jaccard’s coefficient method. Principal co-ordinate analysis was used to represent the varieties in bi-directional space. Dendrogram was constructed using NJ method based on dissimilarity matrix. Cluster analysis based on morphological and molecular marker classified sesame genotypes into two major groups. Mantel test showed an insignificant correlation between phenotypic and molecular marker information. The genotypes belonging to the same geographical area did not always occupy the same cluster. The results confirmed that both genetic and phenotypic diversity in a combined way could efficiently evaluate the variation present in different sesame accessions in any breeding program.
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Papers by Arna Das
medicinal value. In the present study, 37 characters including
both quantitative and qualitative traits of sixty genotypes were
characterized following IPGRI morphological descriptors for
sesame. Multivariate analysis was computed to distinguish the
varieties into different groups. Though thirty six microsatellite
markers including genomic and Est-SSR markers were initially
selected, but, finally, the accessions were genotyped by
eight polymorphic primers. Altogether, 27 alleles were detected
among the 60 genotypes, with an average of 3.37 alleles per
locus. The number of alleles ranged from 2 to 6 alleles. From
data of microsatellite markers, dissimilarity coefficients between
varieties were computed following Jaccard’s coefficient
method. Principal co-ordinate analysis was used to represent
the varieties in bi-directional space. Dendrogram was constructed using NJ method based on dissimilarity matrix.
Cluster analysis based on morphological and molecular marker
classified sesame genotypes into two major groups. Mantel
test showed an insignificant correlation between phenotypic
and molecular marker information. The genotypes belonging
to the same geographical area did not always occupy the same
cluster. The results confirmed that both genetic and phenotypic
diversity in a combined way could efficiently evaluate the
variation present in different sesame accessions in any breeding program.
medicinal value. In the present study, 37 characters including
both quantitative and qualitative traits of sixty genotypes were
characterized following IPGRI morphological descriptors for
sesame. Multivariate analysis was computed to distinguish the
varieties into different groups. Though thirty six microsatellite
markers including genomic and Est-SSR markers were initially
selected, but, finally, the accessions were genotyped by
eight polymorphic primers. Altogether, 27 alleles were detected
among the 60 genotypes, with an average of 3.37 alleles per
locus. The number of alleles ranged from 2 to 6 alleles. From
data of microsatellite markers, dissimilarity coefficients between
varieties were computed following Jaccard’s coefficient
method. Principal co-ordinate analysis was used to represent
the varieties in bi-directional space. Dendrogram was constructed using NJ method based on dissimilarity matrix.
Cluster analysis based on morphological and molecular marker
classified sesame genotypes into two major groups. Mantel
test showed an insignificant correlation between phenotypic
and molecular marker information. The genotypes belonging
to the same geographical area did not always occupy the same
cluster. The results confirmed that both genetic and phenotypic
diversity in a combined way could efficiently evaluate the
variation present in different sesame accessions in any breeding program.