|Appears in Collections:||Aquaculture Journal Articles|
|Peer Review Status:||Refereed|
|Title:||Sex ratios in the progeny of androgenetic and gynogenetic YY male Nile tilapia, Oreochromis niloticus L.|
|Authors:||Ezaz, M Tariq|
Myers, James M
Powell, Stephen F
|Citation:||Ezaz MT, Myers JM, Powell SF, McAndrew B & Penman D (2004) Sex ratios in the progeny of androgenetic and gynogenetic YY male Nile tilapia, Oreochromis niloticus L., Aquaculture, 232 (1-4), pp. 205-214.|
|Abstract:||To investigate alternative routes to develop YY males and to examine some of the factors responsible for departures from predicted sex ratios in the Nile tilapia (Oreochromis niloticus), YY males were produced (i) by androgenesis from XY male parents; and (ii) by mitotic gynogenesis from XY neofemale parents. Progeny testing of these androgenetic and gynogenetic males, and gynogenetic females, showed that most families (i.e. sibling groups of males and in some cases females) gave monosex progeny only, when individuals were crossed to XX fish (i.e. all-male progeny from tested androgenetic or gynogenetic males; all-female progeny from tested gynogenetic females). There were significant differences among androgenetic families in deviations from expected progeny sex ratios, while among the gynogenetic families, the largest sex ratio deviations occurred in the same family for both male and female gynogenetics. The factor(s) that cause departures from the sex ratios predicted by chromosomal sex determination appear to be autosomal, heritable, polymorphic and able to influence sex ratios in both directions. Furthermore, the results suggest that YY and XX lines could be developed in which such factors had been selected against, for example, by elimination of families showing departures from monosex progeny.|
|Rights:||The publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.|
|Affiliation:||University of Stirling|
University of Stirling
University of Stirling
|ezazetal_aquaculture_2004.pdf||106.08 kB||Adobe PDF||Under Embargo until 31/12/2999 Request a copy|
Note: If any of the files in this item are currently embargoed, you can request a copy directly from the author by clicking the padlock icon above. However, this facility is dependant on the depositor still being contactable at their original email address.
This item is protected by original copyright
Items in the Repository are protected by copyright, with all rights reserved, unless otherwise indicated.
If you believe that any material held in STORRE infringes copyright, please contact firstname.lastname@example.org providing details and we will remove the Work from public display in STORRE and investigate your claim.