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Acta Prataculturae Sinica ›› 2023, Vol. 32 ›› Issue (9): 181-197.DOI: 10.11686/cyxb2022441

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Study on sampling strategy of Potentilla anserina in the wild based on SSR molecular markers

Tian TIAN1,2,3(), Jun-qiao LI1,2,3(), Bin MA4, Xin-ci WANG1,2,3, Jun-ru QU1,2,3   

  1. 1.College of Ecology and Environment Qinghai Nationality University,Xining 810007,China
    2.Qinghai Provincial Key Laboratory of High Value Utilization of Characteristic Economic Plants,Xining 810007,China
    3.Tibetan Plateau Juema Industry Research Institute,Xining 810007,China
    4.Qinghai Huangyuan Seed Station,Xining 811699,China
  • Received:2022-11-09 Revised:2023-01-12 Online:2023-09-20 Published:2023-07-12
  • Contact: Jun-qiao LI

Abstract:

In this study, a SSR molecular marker method was used to evaluate sampling strategies of Potentilla anserina in Qinghai, Gansu, Sichuan, and the Tibetan Autonomous Region. The research aim was to provide a theoretical basis for future research on P. anserina sampling and breeding. The P. anserina was randomly selected at the sampling site as the first sample, then take samples at 1, 2, 3, 4, 5, 10, 15, 20, 25, 30, 40, 50, 60, 80, 90, 100, 120, 150, 160, 200, 250, 300, 400, 500, 1000, 1500, 2000, 2500, 5000, 10000, 15000, 20000, 30000, 40000, 50000 m from the first sample. 20 SSR primer loci were used for PCR amplification of 210 wild individuals from 6 populations, and the amplified fragment length was determined using capillary electrophoresis. SSR data were analyzed using POPGENE, NTSYS and GenAIEx 6.5 software packages. The result showed that: 1) The genetic variation was mainly founded in the population [estat variance (Est.Var)=12.745, 84%], and the variation among populations is low (Est.Var=2.477, 16%). 2) The genetic diversity among the six populations is variable. Qilian County was found to have the highest genetic diversity [average heterozygosityH)=0.2797, Shannon-Weiner index (I)=0.4287], and Henan County had the lowest genetic diversity (H=0.2273, I=0.3542). This indicates that the genetic variation among the six populations is relatively low, so it is suggested to increase the interval during sampling. 3) When collecting individual P. anserina samples in the same population, the shortest sampling distance is 5 km. If there are small mountains, sampling can be carried out across the mountains. Sampling between different populations can be divided into two situations: 1) When there is a larger mountain range with a height of 1000-1500 m, samples of the P. anserina population can be collected on either side of the mountain range to establish population variation. 2) In the plains where there is no large mountain range for isolation, the sampling distance to establish P. anserina population variation is not less than 100 km.

Key words: Potentilla anserine, SSR molecular markers, capillary electrophoresis, sampling strategy