LINKAGE STUDIES IN LATHETICUS ORYZAE WATERH. II. LINKAGE OF "BROWN BODY" AND "CREASED ABDOMINAL STERNITES" WITH PEARL.

Abstract

Two new mutants for the tenebrionid long-headed flour beetle Latheticus oryzae are described: creased abdominal segments (cas), and brown body (bwb). Both are autosomal recessives: cas is incompletely penetrant, producing a groove most often on the apparent 1st abdominal segment, but fairly often on the apparent 2nd and occasionally even on the apparent 3rd and 4th abdominal segments; bwb has lowered viability of about 30-40% and modifies the normally orangish body color to a color in the range of yellow ocher to Mikado brown. It is shown that both bwb and cas and cas and p give recombination values of about 36%. Since bwb and p fail to show that they are linked, it is inferred that the order of these genes in the 2nd linkage group is bwb-cas-p.