Genetic Diversity Analysis of 130 Accessions Beta vulgaris Germplasms with Phenotype and Molecular Marker

doi:10.11924/j.issn.1000-6850.casb18050020

Abstract

Abstract: The aim is to study the genetic diversity and genetic distances of sugar beet germplasms. Phenotype and molecular markers were combined to analyze the genetic diversity of 130 accessions B. vulgaris germplasms from three aspects, and the genetic distances were also analyzed. 130 accessions B. vulgaris germplasms showed more abundant genetic diversity. The Shannon- wiener indexes of 22 descriptive characters were between 0.0451 and 1.1867 with an average of 0.8559. The coefficients of variation (CV ) of 23 numerical characters were from 2.94% to 594.84% with an average of 59.10%. The polymorphism information contents (PIC ) of 34 SSR markers were 0.1289-0.7847 with an average of 0.4887. Morphological markers and molecular markers were combined to calculate genetic distances, and these 130 germplasms were divided into five related groups. Sugar yield, brix of root and root rot disease index exhibited significant differences between all adjacent groups. These results suggest that the analyzed B. vulgaris germplasms have abundant genetic diversity, the genetic distance analysis has biological significance and can be the reference for germplasm innovation.

References

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