Assessment of Genetic Variability, Heritability and Genetic Advance for Yield in Advanced Breeding Line (Oryza sativa L.) of  Low Land Rice in Meghalaya

Rai, Ashish; Rai, Mayank; Borpatragohain, Bidisha; vendra, Shi; mar, Ku

doi:10.20546/ijcmas.2020.903.085

Cited by 1 publication

(2 citation statements)

References 4 publications

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“…[12][13][14][15] Other studies found that the genetic variation coefficient of growth traits of crustaceans ranged from 20% to 35%, which was much higher than that of terrestrial animals (7%-10%). 16 In this study, we found that the growth traits of P. monodon have a high level of genetic variation, es-pecially for BW, which can obtain rapid breeding progress. However, it also shows that the genetic regulation mechanism is complex, and the breeding improvement stability is poor.…”

Section: Discussion Genetic Variation Of Growth Traitsmentioning

confidence: 84%

“…At the same time, the high heritability traits could be improved by pure breed continuous breeding, and the low heritability traits can be improved by using different line cross-breeding. 16 In addition, related studies have shown that compared with terrestrial animals, aquaculture animals had greater fecundity, and genetic inbreeding leads to a rapid decline in traits during breeding. Selecting a family breeding strategy to control inbreeding decline was appropriate to ensure stable breeding progress.…”

Section: Evaluation Of Multi-trait Genetic Parameters For Growth Traitsmentioning

confidence: 99%

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Evaluation of genetic parameters of growth traits in G2 selected generation of Penaeus monodon

Jiang,

Wang,

Yang

et al. 2024

Israeli Journal of Aquaculture - Bamidgeh

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Fifteen whole sib families of the second-generation Penaeus monodon were constructed using artificial mating design in 2020. After labeling the families with fluorescent markers, the growth traits and genetic parameters were evaluated in a cement pond for 56 days. The results showed that the coefficient of variation of growth traits was 11.52-47.53%, indicating a high genetic variation. The heritability range of growth traits of the G2 population of P. monodon was 0.25±0.03-0.41±0.13, which belonged to medium and high heritability, and the statistical test results were significant (P<0.01). The heritability of body length and body weight were 0.38±0.11 and 0.41±0.13, respectively. The evaluation results of genetic correlation among growth traits were highly positive, and the statistical test results were significant (P<0.01). The genetic correlation between body weight and body length was the highest (0.99), and the genetic correlation between the width of the first carapace and the height of the first abdominal segment was the lowest (0.71). The phenotypic correlation between body weight and body length was the highest (0.93), and the lowest was head breastplate width and first abdominal segment height (0.53). These results showed that the G2 generation population of P. monodon has high genetic improvement potential, and the combination of family selection and individual selection achieved better genetic gain. The growth traits were highly positively correlated. Body length and body weight could be selected as the key traits for fast growth line selection, while the other growth traits could be indirectly selected through positive genetic correlation.

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Section: Discussion Genetic Variation Of Growth Traitsmentioning

confidence: 84%

Section: Evaluation Of Multi-trait Genetic Parameters For Growth Traitsmentioning

confidence: 99%

Evaluation of genetic parameters of growth traits in G2 selected generation of Penaeus monodon

Jiang,

Wang,

Yang

et al. 2024

Israeli Journal of Aquaculture - Bamidgeh

View full text Add to dashboard Cite

show abstract

Assessment of Genetic Variability, Heritability and Genetic Advance for Yield in Advanced Breeding Line (Oryza sativa L.) of Low Land Rice in Meghalaya

Cited by 1 publication

References 4 publications

Evaluation of genetic parameters of growth traits in G2 selected generation of Penaeus monodon

Evaluation of genetic parameters of growth traits in G2 selected generation of Penaeus monodon

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