Table 3.

Joint segregation of CDKN2L1 genotypes with pigmentation and tumor phenotypes in X. helleri × (X. maculatus Jp 163 B × X. helleri) backcross hybrids

Phenotype†	No. of parentals	No. of recombinants	r‡	χ2
Lp	7	10	0.59	0.5
Hp	30	11	0.27	8.8**
Lp + Hp	37	21	0.36	6.1*
UV-HNL	28	3	0.10	20.2**
UV-HCM	17	2	0.11	11.8**

^†Lp, light pigmentation phenotype; Hp, heavy pigmentation phenotype; UV-HNL, UV-induced hyperplastic nodular lesions; UV-HCM, UV-induced histologically confirmed melanomas. 

^‡Recombination fraction. 

^*, P < 0.05. 

^**, P < 0.01. 

^**, P < 0.001.