Concurrent inbreeding and selection in the domestic fowl

Shultz, Fred T.

doi:10.1038/hdy.1953.1

Cited by 24 publications

(9 citation statements)

References 22 publications

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“…Economically important egg traits in chicken (yolk volume, egg weight) are known to have high heritability (Olsen and Knox, 1940;Shultz, 1953;Zhang et al, 2005). We know little about the genetic control of egg size and number in non-model animal taxa, and most of what we know comes from the common fruit fly Drosophila melanogaster, for which the egg size-number tradeoff is well-known (Mackay et al, 2012;Jha et al, 2015).…”

Section: Genetic Controls On Offspring Size and Fecundity In Animals:mentioning

confidence: 99%

Plant and Animal Reproductive Strategies: Lessons from Offspring Size and Number Tradeoffs

Dani

Kodandaramaiah

2017

Front. Ecol. Evol.

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The tradeoff between offspring size and number is ubiquitous and manifestly similar in plants and animals despite fundamental differences between the evolutionary histories of these two major life forms. Fecundity (offspring number) primarily affects parental fitness, while offspring size underpins the fitness of parents and offspring. We provide an overview of theoretical models dealing with offspring size and fitness relationships. We follow that with a detailed examination of life-history constraints and environmental effects on offspring size and number, separately in plants and animals. The emphasis is on seed plants, but we endeavor to also summarize information from distinct animal groups-insects, fishes, reptiles, birds, and mammals. Furthermore, we analyse genetic controls on offspring size and number in two model organisms-Arabidopsis and Drosophila. Despite the deep evolutionary divergence between plants and animals, we find four trends in reproductive strategy that are common to both lineages: (i) offspring size is generally less variable than offspring number, (ii) offspring size increases with increasing parent body size, (iii) maternal genes restrict offspring size and increase offspring numbers, while zygotic genes act to increase offspring size; such parent-offspring conflicts are enhanced when there is sibling rivalry, and (iv) variation in offspring size increases under sub-optimal (harsh) environmental conditions. The most salient difference between plants and animals is that the latter tend to produce larger (fewer) offspring under sub-optimal conditions while seed plants invest in smaller (many) seeds, suggesting that maternal genetic control over offspring size increases in plants but decreases in animals with parental care. The time is ripe for greater experimental exploration of genetic controls on reproductive allocation and parent-offspring conflicts in plants and animals under sub-optimal (harsh) environments.

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Section: Genetic Controls On Offspring Size and Fecundity In Animals:mentioning

confidence: 99%

Plant and Animal Reproductive Strategies: Lessons from Offspring Size and Number Tradeoffs

Dani

Kodandaramaiah

2017

Front. Ecol. Evol.

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“…Glazener, Blow, Bostian and Dearstyne (1951) reported that the regression of broiler weight at 12 weeks of age on inbreeding was -0.13. Shultz (1953) reported a reduction in reproductive fitness, and a decline in November egg number and November egg weight in inbred lines of chickens.…”

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confidence: 96%

Genetic Variations in the Progenies of the Diallel Crosses of Inbred Lines of Chicken

Yao

1961

Poultry Science

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“…It appears usual for egg weight to be reduced by inbreeding (Roberts et al, 1952;Shultz, 1953a). However, Mueller's (1952) investigation showed no advantage from crosses involving inbred lines when these were compared with crossbreds from noninbred stock.…”

Section: Egg Sizementioning

confidence: 82%

The genetic basis of egg quality

Baker

1960

British Poultry Science

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Concurrent inbreeding and selection in the domestic fowl

Cited by 24 publications

References 22 publications

Plant and Animal Reproductive Strategies: Lessons from Offspring Size and Number Tradeoffs

Plant and Animal Reproductive Strategies: Lessons from Offspring Size and Number Tradeoffs

Genetic Variations in the Progenies of the Diallel Crosses of Inbred Lines of Chicken

The genetic basis of egg quality

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