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Di truyền quần thể của rùa Blanding (Emys blandingii) tại miền trung tây Hoa Kỳ
Tóm tắt
Rùa Blanding (Emys blandingii) đã giảm sút đáng kể ở Bắc Mỹ do các hoạt động của con người, khiến quần thể trở nên nhỏ hơn và ngày càng bị phân mảnh hơn về không gian. Chúng tôi đã lấy mẫu 212 con rùa để đánh giá sự biến đổi tại tám locus microsatellite trong và giữa 18 quần thể E. blandingii trên toàn bộ khu vực phân bố chính của nó tại miền trung tây Hoa Kỳ (Illinois, Iowa, Minnesota, và Nebraska). Tất cả các locus và quần thể đều có tính đa hình cao. Phân tích của chúng tôi cũng phát hiện cấu trúc di truyền đáng kể trong và giữa các địa phương được lấy mẫu, đồng thời tiết lộ dòng gene tổ tiên của E. blandingii trong khu vực này, di chuyển về phía bắc và phía đông từ một trú ngụ cổ đại ở trung tâm Great Plains, phù hợp với các khoảng thời gian tái định cư sau kỷ băng hà. Dữ liệu cũng chỉ ra những 'liên kết' bất ngờ giữa các quần thể địa lý khác nhau ở Nebraska và Illinois. Nghiên cứu của chúng tôi khuyến khích các quyết định bảo tồn cần lưu ý đến sự độc đáo di truyền của các quần thể E. blandingii trong toàn bộ khu vực phân bố chính của chúng.
Từ khóa
#Blanding’s turtle #di truyền quần thể #di truyền học #bảo tồn #microsatelliteTài liệu tham khảo
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