The impact of sample selection strategies on genetic diversity and representativeness in germplasm bank collections

Table 2 Average values for 7 diversity measures characterizing the markers

Method^a	Sample Size (%)	pmiss	he	ho	shan	mrd	Npoly	ndiag
Pop		0.0466	0.0400	0.0655	0.0962	0.1333	161,104	525
CHi	5	0.0989	0.0466	0.0485	0.0984	0.1533	112,843	2004
CHn	5	0.0458	0.0393	0.0649	0.0944	0.1532	112,136	644
DMi	5	0.0532	0.0400	0.0627	0.0958	0.1364	113,974	751
DMn	5	0.0560	0.0401	0.0617	0.0960	0.1353	113,550	797
CHi	10	0.0859	0.0407	0.0519	0.0981	0.1492	128,160	1606
CHn	10	0.0425	0.0395	0.0669	0.0951	0.1493	127,227	600
DMi	10	0.0522	0.0400	0.0630	0.0958	0.1360	128,184	719
DMn	10	0.0540	0.0400	0.0623	0.0959	0.1379	128,252	774
CHi	20	0.0727	0.0405	0.0557	0.0976	0.1443	141,212	1173
CHn	20	0.0459	0.0395	0.0651	0.0950	0.1444	138,439	603
DMi	20	0.0515	0.0400	0.0632	0.0958	0.1357	140,265	687
DMn	20	0.0526	0.0400	0.0628	0.0959	0.1369	140,189	696
CHi	30	0.0649	0.0405	0.0585	0.0976	0.1414	147,391	960
CHn	30	0.0472	0.0393	0.0641	0.0947	0.1416	144,521	634
DMi	30	0.0512	0.0400	0.0633	0.0958	0.1356	146,291	656
DMn	30	0.0518	0.0400	0.0631	0.0959	0.1362	146,273	660
CHi	40	0.0595	0.0406	0.0608	0.0976	0.1392	151,177	825
CHn	40	0.0499	0.0394	0.0630	0.0948	0.1393	148,610	595
DMi	40	0.0511	0.0400	0.0634	0.0958	0.1355	150,016	626
DMn	40	0.0513	0.0400	0.0633	0.0958	0.1358	150,062	623
CHi	50	0.0553	0.0406	0.0626	0.0976	0.1374	153,933	720
CHn	50	0.0553	0.0406	0.0626	0.0976	0.1374	153,933	720
DMi	50	0.0507	0.0400	0.0635	0.0958	0.1356	152,828	587
DMn	50	0.0507	0.0400	0.0635	0.0958	0.1356	152,828	587
SEmin		0.000022	0.000002	0.000011	0.000006	0.000006	11.5	2.3
SEmax		0.000194	0.000017	0.000064	0.000040	0.000039	292.8	12.6

Sampling method (method) and sample size: proportion of missing values (pmiss), expected and observed heterozygosity (he, ho), entropy Shannon index (shan), Modified Rogers’ distance (mrd), number of retained markers (npoly), and number of markers fixed for only a few accessions (ndiag). Minimum and maximum values of standard errors of the means (SEmin, SEmax)
^aPop Population, CHi Core Hunter, independent sample, CHn Core Hunter, nested sample, DMi D-method, independent sample, DMn D-method, nested sample, SE minimum and maximum standard error of mean

ISSN: 1471-2229