World Aquaculture Society Meetings


Your browser does not support the most current secure communications protocol. The World Aquaculture Society is committed to the security of your private information. In order to accept credit card data on this site we are recquired to be in compliance with Payment Card Industry (PCI) standards. Current PCI standards will not allow us to accept traffic from browsers that do not support TLS 1.2 after June 30, 2018. We are alerting you to the important need to update your browser. Changes to our web server made on or before June 30, 2018 will make unavailable with the browser you are currently using. [More..]


Weiwei You *, Xuan Luo, Caihuan Ke
College of Ocean and Earth Sciences
Xiamen University
Xiamen 361102, PR China

China is the most important abalone producing countries, while the abalone cultured production reached to 110,380 tons in 2013, which covered more than 80% of the whole production in the world. Genetic improvement plays an important place in the development of abalone industry in the past decade. Small abalone (H. diversicolor) is commercially important species cultured along the coast of Southern China. Genetic breeding project has been conducted since 2003. Different geographical population were collected or introduced to establish the abundant germplasm banks, and genetic background were analysed by molecular markers. Then pedigree based inbred lines were built and divergent selection were conducted for several generations. In the other way, complete diallel cross were conducted among intraspecies abalone. At last, intraspecies hybridization between two inbred lines of small abalone, which originated from Japan population and Taiwan population, showed exciting heterosis on disease-resistant ability "Dongyou I" small abalone was conferred for "new species certificate" by Ministry of Agriculture and now are large-scale cultured in China.  

"Dongyou I " was backcrossed with Japan and Taiwan population, respectively. Growth and survival for reciprocal backcross progenies were significantly different. Japan population was then selected as recurrent parents for grading cross with Taiwan population. Survival rate of F3 (83.4%) progenies were higher than that of F2 (77.6%) and F1 (71.4%) at grow-out stage. Genetic variation for backcross progenies from different populations were also studied by microsatellite markers.

Studying on the growth-related genes, analyzing the expression patterns of these genes and identification of growth traits-associated SNPs would benefit our understanding in the molecular mechanisms underlying growth traits, and also provide useful information for breeding fast growth abalone new variety. Three growth-related candidate genes were cloned and function of the 3 genes were studied by real-time qRT-PCR and the whole mount in situ hybridization. The single nucleotide polymorphisms (SNPs) in the 3 genes were screened through high-throughput sequencing and genotyped. The association of these SNPs with growth traits and gene expression levels were analyzed. This study will provide important information to our understanding of marker-assisted selection breeding in H. diversicolor.

Copyright © 2001-2018 World Aquaculture Society All Rights Reserved.