Multiple-Genome-Based Simple Sequence Repeat Is an Efficient and Successful Method in Genotyping and Classifying...

Area of Science:

• Plant genetics
• Agricultural science
• Biotechnology

Background:

• Jujube (Ziziphus jujuba) is a vital crop native to China, prized for its nutritional value and resilience in arid regions.
• Evaluating jujube genetic diversity is crucial for conservation, breeding, and improving traits, but traditional methods for developing Simple Sequence Repeat (SSR) markers are inefficient.
• Existing research demands faster and more effective methods for identifying genetic variations within jujube germplasm.

Purpose of the Study:

• To develop a rapid and efficient method for identifying polymorphic SSR markers in jujube.
• To establish a reliable system for classifying and identifying diverse jujube germplasm resources.
• To aid in the conservation and breeding programs for Ziziphus jujuba.

Main Methods:

• Developed a novel Multiple-Genome-Based SSR identification (MGB-SSR) approach using genomes from three jujube cultivars.
• Screened for polymorphic SSRs within the jujube genome using the MGB-SSR method.
• Utilized 12 identified SSR primer pairs to genotype 249 distinct jujube plants and establish digital identification.

Main Results:

• The MGB-SSR approach efficiently identified polymorphic SSRs in the jujube genome.
• Successfully classified 249 jujube genotypes using 12 SSR markers, creating unique digital IDs for each plant.
• Four SSR markers were effective in differentiating triploid jujube genotypes, a first in such studies.

Conclusions:

• The MGB-SSR method is a highly efficient tool for rapid SSR marker discovery in jujube.
• This study successfully differentiated jujube germplasm resources for the first time using 12 SSR markers.
• The findings provide valuable data for classifying Chinese jujube germplasm, assisting researchers and breeders in identifying unknown varieties.