Acta Agriculturae Boreali-Sinica ›› 2023, Vol. 38 ›› Issue (S1): 437-443. doi: 10.7668/hbnxb.20193703

Special Issue: Aquatic products

• Animal Husbandry·Fisheries·Veterinarian • Previous Articles     Next Articles

Genetic Diversity Analysis of Macrobrachium nipponense from Dalonghupao

LAN Ruolin1,2, MA Wenzhi2, ZHANG Limin2, SUN Bo2, CHANG Yumei2, LIANG Liqun2   

  1. 1 College of Fisheries and Life Science,Dalian Ocean University,Dalian 116023,China
    2 National and Local Joint Engineering Laboratory of Freshwater Fish Breeding;Key Laboratory of Freshwater Aquatic Biotechnology and Genetic Breeding,Ministry of Agriculture and Rural Affairs;Heilongjiang Province's Key Laboratory of Fish Stress Resistance Breeding and Germplasm Characteristics on Special Habitat,Heilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Harbin 150070, China
  • Received:2023-05-19 Published:2023-12-28

Abstract:

To learn more about the genetic characteristics of Macrobrachium nipponense and provide theoretical support for breeding selection,it used microsatellite molecular marking technology to compare the genetic diversity of Macrobrachium nipponense in Dalonghupao. The results showed that all 12 microsatellite loci were highly polymorphic loci (PIC>0.5). In the population of Taihu 2,the observed number of alleles ranged from 4 to 11,the effective number of alleles ranged from 3.686 4 to 7.480 5,the observed heterozygosity was 0.318 2—0.833 3,the expected heterozygosity was 0.744 9—0.884 8,the PIC of each locus was 0.691 9—0.851 7. The population of Taihu 2 was with high genetic diversity. In the population of Dalonghupao,the observed number of alleles ranged from 1—2,the effective number of alleles was 1.000 0—2.000 0,the observed heterozygosity was 0.000 0—1.000 0,the expected heterozygosity was 0.000 0—0.517 2,the PIC of each locus was 0.000 0—0.375 0. The population of Dalonghupao was with low genetic diversity. Seven loci in both populations deviated significantly from Hardy-Weinberg equilibrium,and three loci in the population of Dalonghupao could not be tested for Hardy-Weinberg equilibrium. Seven loci in the population of Taihu 2 showed heterozygous deletion,while seven loci in the population of Dalonghupao showed heterozygous excess. AMOVA analysis showed that 36.15% (P<0.01)of the total genetic variation was among populations and 63.85% (P<0.01)was among individuals. The genetic similarity between the population of Dalonghupao and the population of Taihu 2 was 0.276 9 and the genetic distance was 1.284 3,which showed that the genetic similarity between the two populations was low,and the genetic distance was far,and there were great genetic differences. The genetic differentiation index (FST)of the two populations was 0.361 53 (P<0.01),and the degree of genetic differentiation was obvious. The population genetic structure analysis showed an optimal K value of 3,indicating that the two populations had three possible ancestors. The level of genetic diversity of Dalonghupao wild population was low,which prompting us to protect the germplasm resources of the population of Dalonghupao.

Key words: Macrobrachium nipponense, Genetic diversity, Microsatellite, Taihu 2, Molecular marker

Cite this article

LAN Ruolin, MA Wenzhi, ZHANG Limin, SUN Bo, CHANG Yumei, LIANG Liqun. Genetic Diversity Analysis of Macrobrachium nipponense from Dalonghupao[J]. Acta Agriculturae Boreali-Sinica, 2023, 38(S1): 437-443. doi: 10.7668/hbnxb.20193703.

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