Genome-Wide Mapping of Growth-Related Quantitative Trait Loci in Orange-Spotted Grouper (Epinephelus coioides) Using Double Digest Restriction-Site Associated DNA Sequencing (ddRADseq)
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
Authors: Yu, Hui; You, Xinxin; Li, Jia; Liu, Hankui; Meng, Zining; Xiao, Ling; Zhang, Haifa; Lin, Hao-Ran; Zhang, Yong; Shi, Qiong
Abstract
Mapping of quantitative trait loci (QTL) is essential for the discovery of genetic structures that related to complex quantitative traits. In this study, we identified 264,072 raw SNPs (single-nucleotide polymorphisms) by double digest restriction site associated DNA sequencing (ddRADseq), and utilized 3029 of these SNPs to construct a genetic linkage map in orange-spotted grouper (Epinephelus coioides) using a regression mapping algorithm. The genetic map contained 24 linkage groups (LGs) spanning a total genetic distance of 1231.98 cM. Twenty-seven significant growth-related QTLs were identified. Furthermore, we identified 17 genes (fez2, alg3, ece2, arvcf, sla27a4, sgk223, camk2, prrc2b, mchr1, sardh, pappa, syk, tert, wdrcp91, ftz-f1, mate1 and notch1) including three (tert, ftz-f1 and notch1) that have been reported to be involved in fish growth. To summarize, we mapped growth-related QTLs in the orange-spotted grouper. These QTLs will be useful in marker-assisted selection (MAS) efforts to improve growth-related traits in this economically important fish.
The Development of a Manufacturing Route to an MCHr1 Antagonist
ORGANIC PROCESS RESEARCH & DEVELOPMENT
Authors: Golden, Michael; Legg, Danny; Milne, David; Bharadwaj, Arun M.; Deepthi, K.; Gopal, Madan; Dokka, Nagaraju; Nambiar, Sudhir; Ramachandra, Puranik; Santhosh, U.; Sharma, Parhalad; Sridharan, R.; Sulur, Manjunatha; Linderberg, Mats; Nilsson, Anders; Sohlberg, Roger; Kremers, John; Oliver, Samuel; Patra, Debasis
Abstract
Process development work to provide an efficient manufacturing route to a MCHr1 antagonist is presented herewith. Features of this development work include a scalable manufacturing route to the useful 6-oxa-2-azaspiro[3.3]heptane building block and the use of a (soluble) alternative to sodium triacetoxyborohydride.