Complex sentence: The "W1"- "W11" series and "SB1" have been mapped to "KIT", while major alleles for white leg and facial markings have been mapped to or near to the "KIT" gene.
Split into simpler sentences: The "W1"- "W11" series and "SB1" have been mapped to "KIT". Similarly, major alleles for white leg and facial markings have also been mapped to or near to the "KIT" gene.