twPa−1,twPa−2,twPa−3: three newt-haplotypes in the mouse

Abstract

SUMMARYtwPa−1is a new lethalt-haplotype isolated in the South of France. Homozygous embryos die at the time of implantation or shortly there-after following general disorganization.twPa−1complements all previously knownt-haplotypes and has thus to be considered as the first representant of a new complementation group.twPa−2andtwPa−3are viable, male sterile haplotypes, buttwPa−2is low transmitter.