AFLP-based genetic diversity and its comparison with diversity based on SSR, SAMPL, and phenotypic traits in bread wheat

Data on AFLP (eight primer pairs) and 14 phenotypic traits, collected on 55 elite and exotic bread wheat genotypes, were utilized for estimations of genetic diversity. We earlier used these 55 genotypes for a similar study using SSRs and SAMPL. As many as 615 scorable AFLP bands visualized included...

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Bibliographic Details
Published in:Biochemical genetics 2004-02, Vol.42 (1-2), p.43-59
Main Authors: Roy, J K, Lakshmikumaran, M S, Balyan, H S, Gupta, P K
Format: Article
Language:English
Subjects:
Amplified fragment length polymorphism
Bread
Cluster analysis
Cultivars
Data processing
DNA Primers - genetics
Genetic diversity
Genetic Markers
Genetic Variation
Genotypes
Germplasm
Leaf area
Models, Genetic
Phenotype
Polymerase Chain Reaction - methods
Polymorphism, Restriction Fragment Length
Primers
Repetitive Sequences, Nucleic Acid
Triticum
Triticum - genetics
Triticum aestivum
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Summary:Data on AFLP (eight primer pairs) and 14 phenotypic traits, collected on 55 elite and exotic bread wheat genotypes, were utilized for estimations of genetic diversity. We earlier used these 55 genotypes for a similar study using SSRs and SAMPL. As many as 615 scorable AFLP bands visualized included 287 (46.6%) polymorphic bands. The phenotypic traits included yield and its component traits, as well as physiomorphological traits like flag leaf area. Dendrograms were prepared using cluster analysis based on Jaccard's similarity coefficients in case of AFLP and on squared Euclidean distances in case of phenotypic traits. PCA was conducted using AFLP data and a PCA plot was prepared, which was compared with clustering patterns in two dendrograms, one each for AFLP and phenotypic traits. The results were also compared with published results that included studies conducted elsewhere using entirely different wheat germplasm and our own SSR and SAMPL studies based on the same 55 genotypes used in the present study. It was shown that molecular markers are superior to phenotypic traits and that AFLP and SAMPL are superior to other molecular markers for estimation of genetic diversity. On the basis of AFLP analysis and keeping in view the yield performance and stability, a pair of genotypes (E3876 and E677) was recommended for hybridization in order to develop superior cultivars.
ISSN:0006-2928
1573-4927
DOI:10.1023/B:BIGI.0000012143.48298.71