Molecular identification of tracheal genes.

1Complementation group name. 2Mutations in known genes that failed to complement tested mutations in complementation group. 3The relative strengths of the sequenced alleles of each gene were similar unless noted in brackets next to an allele that it was weak [w] or moderate [m] compared to the other, presumed null allele(s), or stronger than the presumed null and likely antimorphic [a]. 4Previously known tracheal function. 5P, presumptive patterning gene; M, presumptive morphogenesis gene.