Carefoot W C
Br Poult Sci. 1987 Mar;28(1):69-73. doi: 10.1080/00071668708416937.
A mating was made between a Gold-Pencilled Hamburgh bantam male and a double-laced bantam female to produce a double heterozygote of the linked eumelanin restrictor (Db) and eumelanin extension (Ml) genes. A male so produced was mated to a pen of Partridge Wyandotte bantam females, thus providing a backcross to the double recessive. Three crossovers occurred among the 31 female progeny suggesting linkage of approximately 10 units between Db and Ml. The pattern gene Pg has previously been shown to be linked with both Db and Ml by approximately 17 and 10 units respectively. The locus of Ml appears therefore to lie between the loci of Db and Pg.
将一只金色 pencilled 汉堡矮脚公鸡与一只双饰边矮脚母鸡进行交配，以产生连锁的真黑素限制基因（Db）和真黑素扩展基因（Ml）的双杂合子。这样产生的一只雄性与一群鹧鸪怀恩多特矮脚母鸡进行交配，从而提供了与双隐性个体的回交。在 31 只雌性后代中出现了三次交叉，表明 Db 和 Ml 之间的连锁约为 10 个单位。此前已表明模式基因 Pg 分别与 Db 和 Ml 连锁，距离约为 17 和 10 个单位。因此，Ml 的位点似乎位于 Db 和 Pg 的位点之间。
