Evaluation of Genetic Diversity of Sugar Beet (Beta vulgaris L.) Crossing Parents Using Agro-morphological Traits and Molecular Markers

Authors
M. M. Majidi 1
Z. Abbasi 2
A. Arzani 3
M. M. Majidi 1
1 Department of Agronomy and Plant Breeding, College of Agriculture, Isfahan University of Technology, Isfahan 84156-83111, Iran
2 1Department of Agronomy and Plant Breeding, College of Agriculture, Isfahan University of Technology, Isfahan 84156-83111, Iran
3 1Department of Agronomy and Plant Breeding, College of Agriculture, Isfahan University of Technology, Isfahan 84156-83111, Iran.
Abstract
Eight pollinators (as pollen parents) and four CMS lines (as seed parents) differing in salinity and drought tolerance were evaluated using agro-morphological traits and microsatellite markers. Root yield, leaf weight, sugar content, sodium content (Na+), potassium content (K+), a-amino nitrogen content, alkalinity coefficient, molasses sugar, white sugar content, extraction coefficient of sugar, dry matter, sugar yield, and white sugar yield were evaluated. The genetic diversity of 14 individual plants within each parent (a total of 168 genotypes) was also assessed using 18 microsatellite (SSR) markers. The results showed that 43 and 32.6% of the total variation in agro-morphological traits could be explained by the first 2 principal components, which could discriminate salinity and drought tolerant parents. Based on SSR analysis, a total number of 104 alleles were detected with an average number of 5.7 alleles per primer pair and an average polymorphism information content (PIC) of 0.64 with the highest PIC belonging to EST-SSR FDSB502. Cluster analysis based on SSR markers clearly discriminated 112 plants belonging to pollen parents from 56 plants of seed parents. In conclusion, the SSR markers have been shown to be efficient and reliable for assessing genetic diversity in sugar beet crossing parents.

Keywords

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Journal of Agricultural Science and Technology
Volume 16, Issue 6
November and December 2014
Pages 1397-1411