Genomic selection for white spot syndrome virus resistance in whiteleg shrimp boosts survival under an experimental challenge test

被引：46

作者：

Lillehammer, Marie ^{[1
]}

Bangera, Rama ^{[2
]}

Salazar, Marcela ^{[3
]}

Vela, Sergio ^{[2
]}

Erazo, Edna C. ^{[3
]}

Suarez, Andres ^{[3
]}

Cock, James ^{[3
]}

Rye, Morten ^{[2
]}

Robinson, Nicholas Andrew ^{[1
,4
]}

机构：

[1] Nofima, Breeding & Genet, N-1430 As, Norway

[2] Benchmark Genet Norway AS, N-6600 Sunndalsora, Norway

[3] Benchmark Genet Colombia, Bogota, Colombia

[4] Univ Melbourne, Sch BioSci, Sustainable Aquaculture Lab Temperate & Trop SALT, Parkville, Vic 3010, Australia

来源：

SCIENTIFIC REPORTS | 2020年 / 10卷 / 01期

关键词：

PENAEUS LITOPENAEUS VANNAMEI; DIFFERENTIAL GENE-EXPRESSION; BODY-WEIGHT; WSSV; PARAMETERS; HEPATOPANCREAS; JAPONICUS; EMPHASIS; IMMUNITY; DISEASES;

D O I：

10.1038/s41598-020-77580-3

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

White spot syndrome virus (WSSV) causes major worldwide losses in shrimp aquaculture. The development of resistant shrimp populations is an attractive option for management of the disease. However, heritability for WSSV resistance is generally low and genetic improvement by conventional selection has been slow. This study was designed to determine the power and accuracy of genomic selection to improve WSSV resistance in Litopenaeus vannamei. Shrimp were experimentally challenged with WSSV and resistance was evaluated as dead or alive (DOA) 23 days after infestation. All shrimp in the challenge test were genotyped for 18,643 single nucleotide polymorphisms. Breeding candidates (G(0)) were ranked on genomic breeding values for WSSV resistance. Two G(1) populations were produced, one from G(0) breeders with high and the other with low estimated breeding values. A third population was produced from "random" mating of parent stock. The average survival was 25% in the low, 38% in the random and 51% in the high-genomic breeding value groups. Genomic heritability for DOA (0.41 in G(1)) was high for this type of trait. The realised genetic gain and high heritability clearly demonstrates large potential for further genetic improvement of WSSV resistance in the evaluated L. vannamei population using genomic selection.

引用

页数：13