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Home > Archive>Volume 24, Issue 3, 2023 >624-635. DOI:10.13430/j.cnki.jpgr.20221014002
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The Genetic Diversity Analysis of Rice Germplasm Resources in Yunnan Province of China
Author:
Affiliation:

1.Institute of Grain Crops， Yunnan Academy of Agricultural Sciences， Kunming 650205;2.Yunnan Research Center of Major Crop Seed Processing Engineering Technology， Kunming 650205;3.Yunnan Key Laboratory of Rice Genetic Improvement， Kunming 650205;4.Seed Management Station of Shuifu， Yunnan Shuifu 657800;5.Mengma Town Agricultural Comprehensive Service Center， Yunnan Menglian 665801;6.Agricultural Technology Extension Center of Menglian County， Yunnan Menglian 665899

Fund Project:

Foundation projects： Yunnan Major Science and Technology Special Plan （202102AE090016）；Modern Agricultural Industry Technology System Construction Special Fund （CARS-01-102）；Yunnan Science and Technology Innovation Platform Construction Plan （2015DH012）； Food Security Seed Industry Support Special Plan （530000210000000013809）；Yunnan Science and Technology Talent and Platform Plan （202105AE160009）

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    Abstract:

    The genetic diversity analysis of 135 rice germplasm resources collected from different altitudes in Yunnan province， P.R. China， were genotyped by using the gene chip GSR40K. The rice germplasm resources at different altitudes were found with rich genetic diversity， and they were divided into five subgroups： indica， partial indica， intermediate， japonica and partial japonica. Eighty-two genes with expected breeding value were genotyped by haplotype markers and functional markers. All accessions were found with the genes related to the grain shattering. Nearly 70% of rice varieties were detected with rice blast resistant genes， whereas only a small proportion of accessions containing insect resistance and fragrance genes were identified. The accessions in this collection were divided into seven subgroups by cluster analysis and principal component analysis. The differentiation of each marker site among the 7 subgroups was evaluated by the Gst value of genetic differentiation index， indicating that there was high genetic differentiation among the 7 subgroups. Moreover， at least 0.09% of the genomic segments in this collection are completely different， and only 0.08% are frequently communicated and fixed， suggesting an extremely low frequency of gene exchange between different subpopulations. Based on the difference of altitude among subpopulations， the differential genomic regions among populations were proposed associating with altitude adaptability. Collectively， these results provided scientific basis for effective protection and efficient utilization of rice resources in rice breeding.

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History
  • Received:October 14,2022
  • Revised:October 26,2022
  • Online: April 27,2023
  • Published: April 27,2023
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