Recombinational landscape of porcine X chromosome and individual variation in female meiotic recombination associated with haplotypes of Chinese pigs

Table 2 Variability of recombination fraction (θ) in SSC-X regions of >10 cM among INRA F₁ sows.

No. of sub-family¹	F₁ sows	Number of offspring	Marker intervals²
			SW980-SW1903	SW1903-SW2456	SW2456-SW259	UMNP71-SW1943	SW1943-SW1608	SW1608-S0218
			θ	θ	θ	θ	θ	θ
1	910002	76	NA³	NA	0.184	0.303 ⁴	0.105	0.158
	910009	72	NA	NA	0.127	0.417	0.085	0.086
	910010	96	NA	NA	0.106	0.271	0.137	0.108
	910013	55	NA	NA	0.109	0.091	0.164	0.127
2	910014	83	0.228	0.316	0.241	0.253	0.146	0.064
	910016	38	0.184	0.342	0.132	0.211	0.132	0.184
	910020	69	0.206	0.232	0.159	0.159	0.159	0.059
3	910018	45	0.231	0.154	0.077	0.222	0.133	0.308
4	910069	62	0.213	0.295	0.161	0.145	0.097	0.210
	910071	68	0.246	0.123	0.154	0.206	0.132	0.091
	910072	63	0.206	0.111	0.175	0.206	0.143	0.143
	910074	83	0.241	0.190	0.177	0.120	0.181	0.157
5	910084	50	0.190	0.190	0.190	0.280	NA	NA
	910086	27	0.222	0.231	0.269	0.148	NA	NA
6	910095	62	0.177	0.113	0.210	0.242	0.081	0.161
	910096	42	0.171	0.250	0.175	0.262	0.024	0.073
	910097	37	0.243	0.081	0.027	0.189	0.189	0.054
Kosambi distance (cM)			22,86	21,63	16.58	24.20	13.17	12.80
Morton test			2,46	28.43	20.11	37.10	14.17	24.66
df			12	12	16	16	14	14
P value⁵			0.998	0.005	0.216	0.002	0.437	0.038

¹Each sub-family consists of F₁ full-sisters.
²The recombination coldspot SW259-UMNP71 was not considered.
³Not applicable because animal is not a double-heterozygote for both flanking markers.
⁴The θ of the F₁ full-sisters within the first subfamily for the interval UMNP71-SW1943 are highlighted in bold because they showed the largest difference in θ (P = 0.0004).
⁵Probability for inter-individual variability of θ.

ISSN: 1471-2164