Table 1.

statistics on basic characteristics of the seven LGs

Group	Marker number	Total distance (cM)	Average distance (cM)	Gaps < 5 (%)
LG1	517	153.21	0.3	100.00
LG2	278	137.78	0.5	98.56
LG3	635	172.18	0.27	99.37
LG4	577	215.72	0.37	98.79
LG5	299	113.66	0.38	98.66
LG6	991	232.68	0.23	99.80
LG7	1542	350.18	0.23	100.00
total	4839	1375.41	0.28	99.57

Gap < 5: indicating the percentages of gaps in which the distance between adjacent markers was smaller than 5 cM