[Genetic analysis and gene mapping of two novel quail-like mutants from the silkworm (Bombyx mori)].
Two novel body marking mutants were discovered during silkworm (Bombyx mori) breeding. The mutants have no obvious eye-spots compared with normal marking (+) individuals, but their star spots and semilunar markings on dorsal sides are normal, and there are dots and lines with longitudinal wave markings on dorsal sides of the 6th to 7th abdominal segments which consist quail markings in between star spots and semilunar markings. The whole body markings are very similar to that of quail mutant (q); thus these mutants are named as quail-like mutants (q-l). Young larvae of one mutant are in brown color, and develop normally. Their cocoons are regular and uniform in size. Thus, this mutant is designated as brown quail-like (q-lb). Another mutant's larvae are in light purple skin; thus this mutant is named as purple quail-like (q-lp). They take little amount of mulberry leaves, and are weak and develop slowly and unevenly. Their larval bodies and cocoons are small. Genetic analysis revealed that both q-lb and q-lp were recessive genes, and they were allelic, with q-lb recessive to q-lp. These genes are different from quail mutant (q) and located on the chromosome 8 after tested by the morphological markers, P3(2), p(2), Ze(3), L(4), re(5), E(6), q(7), I-a(9), ms(12), ch(13), oa(14), cts(16), mln(18), msn(19), rb(21) and so(26) and SSR markers.
The Sericultural Research Institute of Jiangsu University of Science and Technology, Zhenjiang 212003, China.
Qiaoling
Q
Zhao
Key Laboratory of Silkworm and Mulberry Genetic Improvement, Ministry of Agriculture; Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang 212018, China.
Wenbo
W
Wang
Key Laboratory of Silkworm and Mulberry Genetic Improvement, Ministry of Agriculture; Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang 212018, China.
Anli
A
Chen
Key Laboratory of Silkworm and Mulberry Genetic Improvement, Ministry of Agriculture; Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang 212018, China.
Zhiyong
Z
Qiu
Key Laboratory of Silkworm and Mulberry Genetic Improvement, Ministry of Agriculture; Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang 212018, China.
Dingguo
D
Xia
Key Laboratory of Silkworm and Mulberry Genetic Improvement, Ministry of Agriculture; Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang 212018, China.
Heying
H
Qian
Key Laboratory of Silkworm and Mulberry Genetic Improvement, Ministry of Agriculture; Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang 212018, China.
Xingjia
X
Shen
D000483:Alleles; D000818:Animals; D012831:Bombyx / Q000033:anatomy & histology / Q000235:genetics*; D002874:Chromosome Mapping; D005260:Female; D008040:Genetic Linkage; D008297:Male; D018895:Microsatellite Repeats / Q000235:genetics; D009154:Mutation; D010641:Phenotype; D011784:Quail / Q000033:anatomy & histology / Q000235:genetics*