Reprint of: General and specific combining ability of male blue catfish (Ictalurus furcatus) and female channel catfish (Ictalurus punctatus) for growth and carcass yield of their F1 hybrid progeny

Analysis of hybrid combining ability for growth and multiple stress tolerance traits in the Pacific white shrimp, Litopenaeus vannamei

“…We used the following analytical model for combining growth ability and integrated stress tolerance traits (Bosworth and Waldbieser, 2014;Tran et al, 2021):…”

“…The dominant role of SCA in the growth and multiple stress tolerance indicates that the L. vannamei population has high heterosis, rich genetic diversity, and unstable genetic variation; thus, this population is suitable for cross-breeding. Studies on aquatic animals, such as catfish (Bosworth and Waldbieser, 2014), salmon (Vandeputte et al, 2002), rainbow trout (Henryon et al, 2002), sea bass (Wang et al, 2006), and Atlantic cod (Tosh et al, 2010), have shown that the breeding traits of the progeny can be markedly influenced by the maternal genetic effects. This is in contrast to that noted in the present results.…”

“…Combining ability analysis is important in studies of aquatic animal hybrid breeding, which is an important genetic improvement approach; combining ability analysis is also a prerequisite for the utilization of heterosis (Hedgecock and Davis, 2007). There have been many reports regarding combining abilities in aquatic animals (Deng et al, 2010;Bosworth and Waldbieser, 2014;Costa et al, 2019;Chaivichoo et al, 2020). Chaivichoo et al (2020) reported that the total combining ability was higher in male catfish than in female catfish 0.25 to 362.64 vs. 0.23 to 190.32, suggesting that the growth performance of a hybrid is largely dependent on additive genetic variation from its male parent, followed by variation from its female parent.…”

A study of heterosis, combining ability and heritability between two male sterile lines and ten inbred lines of Tagetes patula

“…Several reports have suggested that trait heritability is not a constant but may vary according to the environmental conditions (Alza and Fernandez-Martinez 1997;Andalo et al 1998;Galloway 2001;Agrawal 2002;Galloway and Etterson 2007;Riginos et al 2007;Ebrahimiyan et al 2013). Thus, plant phenotypes appeared to be significantly influenced by the levels of light, nutrients, water, temperature and CO 2 , or by herbivore pressures (Bossdorf et al 2009). Genetic variance and heritability of a trait were observed to be reduced in stressful environments as compared to under optimum growing conditions; in other words, the narrow-sense heritability of a trait was lowered when conditions were unfavorable (Hoffmann and Merilä 1999;Rajabi et al 2008).…”