甘肃胡麻地方品种遗传多样性和群体结构分析

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中图分类号：S563.2 文献标志码：A 文章编号：1008-0864（2025）09-0069-10

Analysis ofGenetic Diversity and Population Structure ofFlax Local VarietiesinGansu

LIU Jie¹，WANG Bin²，HOU Jingjing²，WU Bing1*，ZHAO Li1* （1.CollegeofLifeScienceandTechnology，GansuAgriculturalUniversity，Lanzhou73oo，China；2.CropResearchIstitute， GansuAcademy ofAgricultural Sciences，Lanzhou 73oo7O，China）

Abstract：FlaxisamajoroilseedcropinaridregionsofChina，andGansuisoneof the mainproductionareasofflax in China.Studying the genetic diversityand population structure of flax local varieties in Gansu province is of great significance for uncovering rich and superior allelic variations and improving sesame breeding efciency.Using SSR molecular marker，the genetic diversityand population structureof94flax local varieties from13counties（cities and districts）in Gansu province wereanalyzed.The results showed that 46 aleles were got by 21SSR primers with 2～3 alelesper primer;thepolymorphism information contents were0.158～0.522 withanaverageof0.343，theobserved heterozygosity（ Ho ）wasO.060～O.957withanaverageof O.448，the expectedheterozygosity（ He ）was 0.126～0.569 withanaverageofO.408，and theShannondiversity index were0.267～0.86O with anaverageof 0.613.Withagenetic distance thresholdof O.028，the 94 sesame resourceswere grouped into 4 groups.It showed that the genetic diferences between sesame local varieties in Gansu province were small，the genetic distances were close，and the genetic background was narrow.

Keywords：flax; local variety；genetic diversity；population structure

胡麻产业面临着种植面积连续萎缩、生产成本高、单产低、对国际市场依赖度高的现实困境，但胡麻在油料作物中的地域优势、文化优势、品质优势具有重要且无法替代的价值。（剩余12173字）