Table 1.

Relative abundance of preputial gland volatiles in the four groups.

GC Peak	RT min	Compounds	BB	CC	BC	CB
1	9.65	E-β-farnesene	4.95 ± 2.40	3.67 ± 1.85	4.71 ± 2.46	7.02 ± 2.10
2	10.77	E,E-α-farnesene	2.55 ± 1.35	1.95 ± 1.12	2.54 ± 1.51	3.75 ± 1.24
3	14.18	Z-7-Tetradecenol	0.35 ± 0.18	0.37 ± 0.22	0.33 ± 0.20	0.48 ± 0.25
4	14.58	1-Tetradecanol	0.22 ± 0.10	0.18 ± 0.06	0.17 ± 0.09	0.21 ± 0.09
5	16.68	Z-5-Tetradecenol acetate	0.41 ± 0.22	0.79 ± 0.40	0.62 ± 0.38	0.82 ± 0.25
6	17.15	1-Tetradecanol acetate	0.56 ± 0.25	0.71 ± 0.33	0.69 ± 0.33	0.84 ± 0.22
7	17.61	Z-11-Hexadecenol	0.12 ± 0.05	0.10 ± 0.05	0.11 ± 0.06	0.12 ± 0.07
8	17.99	1-Hexadecanol (branched)	0.23 ± 0.08	0.15 ± 0.09	0.15 ± 0.08	0.22 ± 0.06
9	18.29	Z-9-Hexadecenol	0.53 ± 0.26	0.43 ± 0.15	0.37 ± 0.21	0.50 ± 0.20
10	18.68	1-Hexadecanol	13.01 ± 5.35	8.83 ± 1.66	8.24 ± 3.63	10.23 ± 2.94
11	19.16	1-Pentadecanol acetate	0.19 ± 0.05	0.16 ± 0.10	0.17 ± 0.07	0.21 ± 0.09
12	19.86	Z-9-Hexadecenol acetate	0.82 ± 0.23a	0.62 ± 0.12a,b,c	0.81 ± 0.11b	0.97 ± 0.08c
13	20.18	1-Heptadecanol (branched)	0.12 ± 0.08	0.06 ± 0.03	0.05 ± 0.02	0.08 ± 0.03
14	20.38	1-Hexadecanol acetate (branched)	1.06 ± 0.28	0.77 ± 0.21	1.00 ± 0.21	1.11 ± 0.14
15	20.58	Isomer of Z-11-Hex decenol acetate	2.39 ± 0.63	3.37 ± 0.97	2.56 ± 0.54	3.00 ± 0.43
16	20.69	Z-11-Hexadecenol acetate	0.52 ± 0.33	0.39 ± 0.22	0.61 ± 0.15	0.53 ± 0.18
17	21.18	1-Hexadecanol acetate	63.83 ± 8.40	69.11 ± 4.74	68.35 ± 6.17	61.79 ± 5.16
18	22.25	1-Heptadecanol acetate (branched)	0.17 ± 0.06a	0.48 ± 0.10a,b,c	0.20 ± 0.08b	0.24 ± 0.06c
19	22.41	1-Heptadecanol acetate (branched)	1.70 ± 0.25a,b	0.84 ± 0.21a,c,d	1.09 ± 0.13b,d	1.47 ± 0.21d
20	22.93	1-Heptadecanol acetate	0.81 ± 0.20	0.56 ± 0.24	0.73 ± 0.13	0.83 ± 0.16
21	24.08	Dodecyl octanoate	0.88 ± 0.17a,b,c	1.46 ± 0.31a	1.47 ± 0.25b	1.34 ± 0.12c
22	24.24	Z-7-Octadecenol acetate	0.58 ± 0.19	0.86 ± 0.52	0.52 ± 0.27	0.61 ± 0.16
23	24.70	Octadecanol acetate	3.99 ± 0.98	4.15 ± 1.15	4.20 ± 0.91	3.64 ± 0.47

Data are presented as mean ± SD, n = 6 for each group; compounds were identified using mass library (NIST 2002). ^a–eMeans in a row marked by a same superscript letter show significant differences (P < 0.05, using one-way ANOVA with LSD post hoc t-test or Kruskal–Wallis H with post hoc Mann–Whitney U test). BB: BALB/c strain; CC: C57BL/6 strain; BC: hybrid of BALB♀ × C57♂; CB: hybrid of C57♀ × BALB♂; RT: retention time.