Browsing by Author "Ponzoni, R.W."
Now showing items 21-40 of 70
-
Fundamental considerations about design and sample size in strain comparisons and their implications
(2011)Type: Journal ArticleWell-known formulae for the calculation of the necessary number of animals in strain comparisons are presented. Their use is illustrated with an example with fish. Use of the formulae in the planning and design of strain ... -
Genetic analysis of Nile tilapia (Oreochromis niloticus) selection line reared in two input environments
(2009)Type: Journal ArticleAscertaining the appropriate selection environment for Nile tilapia (Oreochromis niloticus) in Africa is a critical issue. Two data sets derived from two selection lines originating from a common base population were ... -
Genetic analysis of the GIFT strain (Nile Tilapia, Oreochromis niloticus) in Malaysia
(2010)Type: Conference PaperThe Genetically Improved Farmed Tilapia (GIFT) strain is well known worldwide because of its high performance. A first phase of the project ended in 1997 after five generations of selection. In 2002, the GIFT population ... -
Genetic and environmental factors affecting growth of Nile tilapia (Oreochromis niloticus) juveniles: Modelling spatial correlations between hapas
(2006)Type: Journal ArticleThe aim of this study was to quantify the environmental and genetic effects on early growth of Nile tilapia, Oreochromis niloticus. -
Genetic and non-genetic indirect effects for harvest weight in the GIFT strain of Nile tilapia (Oreochromis niloticus)
(2016)Type: Journal ArticleThe main objective of this study was to quantify the heritable variation for growth rate of GIFT, and the contribution of IGEs to this heritable variation. Here we describe the experiment conducted for this purpose, and ... -
Genetic evaluation of a complete diallel cross involving three populations of freshwater prawn (Macrobrachium rosenbergii) from different geographical regions of India
(2011)Type: Journal ArticleEstimates of additive genetic, reciprocal and average heterosis effects were obtained from a three by three complete diallelcross experiment for giant freshwater prawn Macrobrachium rosenbergii. The data were generated in ... -
Genetic improvement and dissemination of rohu (labeo rohita, Ham.) in India
(2007)Type: Book ChapterExperts carried out selective breeding of Rohu carp for greater harvest weight and yielded an average of 17% genetic gain per generation in 5 generations of selection. -
Genetic improvement and effective dissemination: keys to prosperous and sustainable aquaculture industries
(2006)Type: Book ChapterThere is an increasing demand for fish in the world due to a growing population, better economic situation in some sectors, and greater awareness of health issues in relation to food. Since capture fisheries have stagnated, ... -
Genetic improvement of carp reduces poverty, hunger in Asia
(2008)Type: Journal ArticleBreeding programs for carp species carried out in a number of Asian countries have delivered genetically fast growing strains to farmers and producers. The economic benefits resulting from the programs are substantial. The ... -
Genetic improvement of farmed tilapias: composition and genetic parameters of a synthetic base population of Oreochromis niloticus for selective breeding
(2007)Type: Journal ArticleThe present study is based on data recorded from fish of the third generation of the GIFT project (Genetic Improvement of Farmed Tilapias). The objective of the study was to compose a synthetic base population of Nile ... -
Genetic improvement of farmed tilapias: Genetic parameters for body weight at harvest in Nile tilapia (Oreochromis niloticus) during five generations of testing in multiple environments
(2012)Type: Journal ArticleThe main objective of this paper was to report more reliable estimates of the genetic variation and the genotype by test environment interaction for harvest body weight in the GIFT population in the Philippines than could ... -
Genetic improvement of farmed tilapias: Response to five generations of selection for increased body weight at harvest in Oreochromis niloticus and the further impact of the project
(2017)Type: Journal ArticleSelection for increased body weight at harvest in Nile tilapia (Oreochromis niloticus) was carried out for five generations from 1991 to 1996, as a part of the project Genetic Improvement of Farmed Tilapias (GIFT). The ... -
Genetic improvement of fillet traits and flesh quality in aquaculture species
(2010)Type: Conference PaperAbstract only -
Genetic improvement of Israeli blue (Jordan) tilapia, Oreochromis aureus (Steindachner), through selective breeding for harvest weight
(2014)Type: Journal ArticleGenetic parameters and selection responses were obtained for harvest body weight of blue tilapia (Oreochromis aureus) from data collected over three generations in a selected population. A total of 18 194 records representing ... -
Genetic improvement of Nile tilapia (Oreochromis niloticus) with special reference to the work conducted by the WorldFish Center with the GIFT strain
(2011)Type: Journal ArticleWe mainly (but not exclusively) draw on research and development work carried out by The WorldFish Center (WorldFish). We review in detail the current state of development of a selection program that has had a main focus ... -
Genetic improvement programs for aquaculture species in developing countries: prospects and challenges
(2009)Type: Conference PaperAquaculture in developing countries is largely based on unimproved fish strains. There is ample evidence indicating the potential of genetic improvement programs and a range of selection methods may be used. Examples of ... -
Genetic improvement programs for red tilapia Oreochromis spp in Asia
(2011)Type: Conference PaperRed tilapia (Oreochromis spp) has become popular in Asian countries due to its greater economic value relative to Nile tilapia. As there is a growing demand for quality seed of this species, the WorldFish Center has initiated ... -
Genetic parameter and genotype by environment interaction for body weight of Oreochromis shiranus
(2006)Type: Journal ArticleGenetic and phenotypic parameter estimates for tagging and harvest body weights were obtained from the F1 base (377 offspring of 59 full-sib families), F2 (1241 offspring of 52 full- and 33 half-sib families) and F3 (1052 ... -
Genetic parameters and correlated responses in female reproductive traits in the GIFT strain
(2016)Type: Journal ArticleThe aim of this study was to examine genetic variation in reproductive traits and to estimate correlated responses in such traits to selection for high growth rate in the GIFT strain of Nile tilapia (Oreochromis niloticus). -
Genetic parameters for survival during the grow-out period in the GIFT strain of Nile tilapia (Oreochromis niloticus) and correlated response to selection for harvest weight
(2015)Type: Journal ArticleThe aims of this study were the estimation of genetic parameters for survival rate from tagging until harvest and the evaluation of the correlated response in survival rate to selection for harvest weight in the genetically ...
