Offspring sex ratio in domestic goats: Trivers-Willard out of natural selection

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F15%3A10301885" target="_blank" >RIV/00216208:11310/15:10301885 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00023752:_____/15:43914774

Výsledek na webu

<a href="http://dx.doi.org/10.17221/8170-CJAS" target="_blank" >http://dx.doi.org/10.17221/8170-CJAS</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.17221/8170-CJAS" target="_blank" >10.17221/8170-CJAS</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Offspring sex ratio in domestic goats: Trivers-Willard out of natural selection

Popis výsledku v původním jazyce

The Trivers-Willard hypothesis (TWH) predicts the ability of mothers to adaptively adjust off-spring sex ratio through differential maternal investment based on their relative body condition. In the present study we have analyzed an extensive data set onthe secondary sex ratio (SSR) including 59 335 goat kids born in 30 633 litters to 11 644 mothers on farms all over the Czech Republic during the years 1992-2004. We found a male-biased SSR 0.568, which significantly deviates from the predicted balancedFisherian equilibrium 1:1 (P < 0.0001). A generalized estimating equation model controlled for mother's identity revealed a significant effect of maternal age and season of conception (P < 0.001). Conversely, neither paternal age, gestation length, norlitter size were found to explain the sex ratio variation. We also failed to prove any effect of variables associated with maternal condition, particularly her body weight, breed, arbitrary ranking of genetic quality, and hornedness that

Název v anglickém jazyce

Offspring sex ratio in domestic goats: Trivers-Willard out of natural selection

Popis výsledku anglicky

The Trivers-Willard hypothesis (TWH) predicts the ability of mothers to adaptively adjust off-spring sex ratio through differential maternal investment based on their relative body condition. In the present study we have analyzed an extensive data set onthe secondary sex ratio (SSR) including 59 335 goat kids born in 30 633 litters to 11 644 mothers on farms all over the Czech Republic during the years 1992-2004. We found a male-biased SSR 0.568, which significantly deviates from the predicted balancedFisherian equilibrium 1:1 (P < 0.0001). A generalized estimating equation model controlled for mother's identity revealed a significant effect of maternal age and season of conception (P < 0.001). Conversely, neither paternal age, gestation length, norlitter size were found to explain the sex ratio variation. We also failed to prove any effect of variables associated with maternal condition, particularly her body weight, breed, arbitrary ranking of genetic quality, and hornedness that

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

EG - Zoologie

OECD FORD obor

—

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Czech Journal of Animal Science

ISSN

1212-1819

e-ISSN

—

Svazek periodika

60

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

8

Strana od-do

208-215

Kód UT WoS článku

000357483200002

EID výsledku v databázi Scopus

2-s2.0-84929620058