השוואת שיטות

	סלקציה סוחפת (D של טאג'ימה)	מבחן HKA
תחום	גנטיקה	גנטיקה
משפחה	Process / pipeline	Process / pipeline
שנת המקור	1989	1987
הוגה השיטה	Fumio Tajima	Richard Hudson, Martin Kreitman & Montserrat Aguade
סוג	Neutrality test	Statistical test
מקור מכונן	Tajima, F. (1989). Statistical method for testing the neutral mutation hypothesis by DNA polymorphism. Genetics, 123(3), 585–595.	Hudson, R. R., Kreitman, M., & Aguadé, M. (1987). A test of neutral molecular evolution based on nucleotide data. Genetics, 116(1), 153–159.
כינויים	Tajima's D test, Selective sweep analysis, Neutrality test	HKA test, Polymorphism divergence test
קשורות	4	4
תקציר	Tajima's D is a statistical test designed to detect selective sweeps—recent, rapid fixation of advantageous mutations—from patterns of genetic variation in DNA sequences. Developed by Fumio Tajima in 1989, this test measures deviations from neutrality by comparing different measures of DNA sequence diversity. A significant Tajima's D value indicates departure from neutral evolution, suggesting positive selection, population structure, or demographic events.	The Hudson-Kreitman-Aguade (HKA) test is a statistical method that tests for neutral evolution by comparing levels of within-population polymorphism and between-population divergence at multiple loci. Developed by Hudson, Kreitman, and Aguade in 1987, this test uses the principle that neutral loci should show expected relationships between polymorphism and divergence. Loci deviating from these relationships are candidates for selection. The HKA test is particularly useful for detecting selection in genome-wide surveys because it uses relative comparisons across loci rather than requiring external calibration.