PMID- 32918398 OWN - NLM STAT- MEDLINE DCOM- 20211129 LR - 20211129 IS - 1744-7917 (Electronic) IS - 1672-9609 (Linking) VI - 28 IP - 5 DP - 2021 Oct TI - Molecular basis of the silkworm mutant re(l) causing red egg color and embryonic death. PG - 1290-1299 LID - 10.1111/1744-7917.12871 [doi] AB - The coloration and hatchability of insect eggs can affect individual and population survival. However, few genetic loci have been documented to affect both traits, and the genes involved in regulating these two traits are unclear. The silkworm recessive mutant re(l) shows both red egg color and embryo mortality. We studied the molecular basis of the re(l) phenotype formation. Through genetic analysis, gene screening and sequencing, we found that two closely linked genes, BGIBMGA003497 (Bm-re) and BGIBMGA003697 (BmSema1a), control egg color and embryo mortality, respectively. Six base pairs of the Bm-re gene are deleted in its open reading frame, and BmSema1a is expressed at abnormally low levels in mutant re(l) . BmSema1a gene function verification was performed using RNA interference and clustered randomly interspersed palindromic repeats (CRISPR)/CRISPR-associate protein 9. Deficiency of the BmSema1a gene can cause the death of silkworm embryos. This study revealed the molecular basis of silkworm re(l) mutant formation and indicated that the Sema1a gene is essential for insect embryo development. CI - (c) 2020 Institute of Zoology, Chinese Academy of Sciences. FAU - Luo, Jiang-Wen AU - Luo JW AD - State Key Laboratory of Silkworm Genome Biology, Key Laboratory of Sericultural Biology and Genetic Breeding, College of Biotechnology, Southwest University, Chongqing, 400715, China. FAU - An, Er-Xia AU - An EX AD - State Key Laboratory of Silkworm Genome Biology, Key Laboratory of Sericultural Biology and Genetic Breeding, College of Biotechnology, Southwest University, Chongqing, 400715, China. FAU - Lu, Ya-Ru AU - Lu YR AD - State Key Laboratory of Silkworm Genome Biology, Key Laboratory of Sericultural Biology and Genetic Breeding, College of Biotechnology, Southwest University, Chongqing, 400715, China. FAU - Yang, Ling AU - Yang L AD - State Key Laboratory of Silkworm Genome Biology, Key Laboratory of Sericultural Biology and Genetic Breeding, College of Biotechnology, Southwest University, Chongqing, 400715, China. FAU - Gai, Ting-Ting AU - Gai TT AD - State Key Laboratory of Silkworm Genome Biology, Key Laboratory of Sericultural Biology and Genetic Breeding, College of Biotechnology, Southwest University, Chongqing, 400715, China. FAU - He, Song-Zhen AU - He SZ AD - State Key Laboratory of Silkworm Genome Biology, Key Laboratory of Sericultural Biology and Genetic Breeding, College of Biotechnology, Southwest University, Chongqing, 400715, China. FAU - Wu, Song-Yuan AU - Wu SY AD - State Key Laboratory of Silkworm Genome Biology, Key Laboratory of Sericultural Biology and Genetic Breeding, College of Biotechnology, Southwest University, Chongqing, 400715, China. FAU - Hu, Hai AU - Hu H AD - State Key Laboratory of Silkworm Genome Biology, Key Laboratory of Sericultural Biology and Genetic Breeding, College of Biotechnology, Southwest University, Chongqing, 400715, China. FAU - Li, Chun-Lin AU - Li CL AD - State Key Laboratory of Silkworm Genome Biology, Key Laboratory of Sericultural Biology and Genetic Breeding, College of Biotechnology, Southwest University, Chongqing, 400715, China. FAU - Lu, Cheng AU - Lu C AD - State Key Laboratory of Silkworm Genome Biology, Key Laboratory of Sericultural Biology and Genetic Breeding, College of Biotechnology, Southwest University, Chongqing, 400715, China. FAU - Tong, Xiao-Ling AU - Tong XL AD - State Key Laboratory of Silkworm Genome Biology, Key Laboratory of Sericultural Biology and Genetic Breeding, College of Biotechnology, Southwest University, Chongqing, 400715, China. FAU - Dai, Fang-Yin AU - Dai FY AUID- ORCID: 0000-0002-0215-2177 AD - State Key Laboratory of Silkworm Genome Biology, Key Laboratory of Sericultural Biology and Genetic Breeding, College of Biotechnology, Southwest University, Chongqing, 400715, China. LA - eng GR - CARS-18-ZJ0102/Earmarked Fund for China Agriculture Research System/ GR - 31830094/National Natural Science Foundation of China/ GR - 2013AA102507/Hi-Tech Research and Development 863 Program of China Grant/ PT - Journal Article DEP - 20201013 PL - Australia TA - Insect Sci JT - Insect science JID - 101266965 RN - 0 (Insect Proteins) RN - 0 (Semaphorins) SB - IM MH - Animals MH - *Bombyx/embryology/genetics MH - Embryo, Nonmammalian MH - Embryonic Development/genetics MH - *Insect Proteins/genetics MH - Ovum/*pathology MH - Phenotype MH - Pigmentation MH - Semaphorins/*genetics OTO - NOTNLM OT - BmSema1a OT - CRISPR/Cas9 OT - embryonic mortality OT - red egg OT - silkworm EDAT- 2020/09/13 06:00 MHDA- 2021/11/30 06:00 CRDT- 2020/09/12 05:36 PHST- 2020/08/26 00:00 [revised] PHST- 2020/05/21 00:00 [received] PHST- 2020/09/01 00:00 [accepted] PHST- 2020/09/13 06:00 [pubmed] PHST- 2021/11/30 06:00 [medline] PHST- 2020/09/12 05:36 [entrez] AID - 10.1111/1744-7917.12871 [doi] PST - ppublish SO - Insect Sci. 2021 Oct;28(5):1290-1299. doi: 10.1111/1744-7917.12871. Epub 2020 Oct 13.