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Chinese Agricultural Science Bulletin ›› 2022, Vol. 38 ›› Issue (36): 67-73.doi: 10.11924/j.issn.1000-6850.casb2022-0009

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Longan Germplasms Resources: Genetic Diversity Analysis and Fingerprint Construction Based on SSR Markers

GUO Dongliang(), HUANG Shilian, WANG Jing, HAN Dongmei, LI Jianguang()   

  1. Institute of Fruit Tree Research, Guangdong Academy of Agriculture Sciences, Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization, Ministry of Agriculture and Rural Affairs, Guangdong Provincial Key Laboratory of Tropical and Subtropical Fruit Tree Research, Guangzhou 510641
  • Received:2022-01-04 Revised:2022-05-02 Online:2022-12-25 Published:2023-01-17

Abstract:

The objective of this study is to provide technical support for molecular identification and variation analysis of longan germplasm. 85 longan germplasm resources were used as materials. SSR detection, population diversity and molecular fingerprint analysis of longan germplasms were carried out by fluorescence labeled capillary electrophoresis. A total of 29 alleles were obtained by using 7 pairs of SSR primers, and the number of alleles in each pair ranged from 3 to 7, with an average of 4.14. The number of effective alleles (Ne) ranged from 1.52 to 3.133, with an average of 2.175, and the effective alleles accounted for 52.49%. The average Shannon genetic diversity index (I) of the population was 0.877. The variation range of the observed heterozygosity (Ho) was 0.341-0.782, with an average of 0.51. The expected variation range of heterozygosity (He) was 0.342-0.681, with an average of 0.514, greater than 0.5. The genetic distance of the 85 longan germplasms was 0.00-0.635, and the average genetic distance was 0.299. The construction of fingerprints of the 85 longan germplasms can provide an effective means for the identification of many homonymous foreign bodies or homonymous anomalies in production.

Key words: longan germplasm resources, genetic diversity, simple sequence repeat (SSR) markers, fingerprint