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Abstract
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Article Information:
Genetic Diversity of Hexaploid Wheat Based on Polymorphism in Quality Characteristics
Sarwat Afshan and Farzana Nasir Naqvi
Corresponding Author: Sarwat Afshan
Submitted: 2011 April, 21
Accepted: 2011 June, 10
Published: 2011 July, 20 |
Abstract:
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High Molecular Weight Glutenin Subunits (HMW-GS) were used as markers to assess the genetic
diversity among 52 local wheat genotypes and their yield producing capacity with the object of exploiting
diversity in the commercial varieties and landraces grown in different regions of Pakistan. HMW-GS profiling
of wheat genotypes was done through SDS-PAGE; polymorphism was revealed at HMW-GS encoding loci;
Glu-A1, Glu-B1 and Glu-D1; alleles 3, 6 and 4 were identified, respectively. The most common composition
of HMW-GS in the population was 2*, 17+18, and 2+12. ANOVA revealed significant variation among the
varieties for yield parameters and also there is correlation found between these parameters. The average
intrapopulation heterozygosity for the three Glu-1 loci was high in Punjab (60.36%) compared to the other
populations that is Sindh (48.88%), Baluchistan (33.33%), Azad Jammu Kashmir (30.36%) and Khyber
Pakhtunkhwa (55.98%). Among populations Punjab had maximum genetic similarity of 93.04% with Sindh
thus a small genetic distance of 7.21% which showed that the two populations are more identical. Genetic
distance was large between the population of Azad Jammu Kashmir and Khyber Pakhtunkhwa. Though the
bread-making quality of wheat is good but the heterogeneity is low among the wheat varieties of Pakistan
showing a need for improving the genetic pool of the local genotypes for the future breeding programs.
Key words: Bread-making, genetic diversity, genetic pool, heterogeneity, HMW-glutenins, quality, yield parameters
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Cite this Reference:
Sarwat Afshan and Farzana Nasir Naqvi, . Genetic Diversity of Hexaploid Wheat Based on Polymorphism in Quality Characteristics. Asian Journal of Agricultural Sciences, (4): 335-341.
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ISSN (Online): 2041-3890
ISSN (Print): 2041-3882 |
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