NDLI: Responses to two-way selection on growth in mass-spawned F1 progeny of Argopecten irradians concentricus (Say)

Content Provider	Springer Nature Link
Author	Wang, Hui Liu, Jin Li, Yanhong Zhu, Xiaowen Liu, Zhigang
Copyright Year	2014
Abstract	In the present study, the effect of one-generation divergent selection on the growth and survival of the bay scallop (Argopecten irradians concentricus) was examined to evaluate the efficacy of a selection program currently being carried out in Beibu Bay in the South China Sea. A total of 146 adult scallops were randomly selected from the same cultured population of A. i. concentricus, and divided into two groups in shell length (anterior-posterior measurement): large (4.91–6.02 cm, n=74) and small (3.31–4.18 cm, n=72). At the same time, a control group was also randomly sampled (4.21–4.88 cm, n =80). Mass-spawned F 1 progenies from the three size groups were obtained and reared under identical conditions at all growth phases. The effects of two-way (or upward-downward) selection on fertilization rate, hatching rate, survival rate, daily growth in shell length and body weight were assessed in the three size groups. Results show that significant differences (P<0.01) were found in hatching rate, survival rate and daily growth of F1 progenies, but not in fertilization rate (P>0.05), among the three groups. The hatching rate, survival rate and daily growth of the progeny of large-sized parents were greater than those of the control group (P<0.05), which in turn were larger than those of small-sized group (P<0.05). Responses to selection by shell length and body weight were 0.32 ± 0.04 cm and 2.18 ± 0.05 g, respectively, for the upward selection, and −0.14 ± 0.03 cm and −2.77 ± 0.06 g, respectively, for the downward selection. The realized heritability estimates of shell length and body weight were 0.38 ± 0.06 cm and 0.22 ± 0.07 g for the upward selection, and 0.24 ± 0.06 cm and 0.37 ± 0.09 g for the downward selection, respectively. The change in growth by bidirectional selection suggests that high genetic variation may be present in the cultured bay scallop population in China.
Starting Page	349
Ending Page	357
Page Count	9
File Format	PDF
ISSN	02544059
Journal	Chinese Journal of Oceanology and Limnology
Volume Number	32
Issue Number	2
e-ISSN	19935005
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2014-03-06
Publisher Place	Berlin, Heidelberg
Access Restriction	Subscribed
Subject Keyword	Argopecten irradians concentricus (Say) two-way selection response to selection realized heritability F1 progeny mass-spawned Oceanography
Content Type	Text
Resource Type	Article
Subject	Water Science and Technology Oceanography

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