Abstract:This study was carried out to identify parents and hybrids by determination of general combining ability (GCA), specific combining ability (SCA), and heterosis in pure lines and their hybrids, which were selected from our gene sources, to determine new hybrid combinations that could be alternative or higher in yielding compared with M × N hybrid used in production. Combining ability and heterosis effects were studied for the eight quantitative characters through line × tester mating design. Chinese origin line… Show more
“…Apart from improving productivity, hybridization is necessary to set aside the degenerating effect of recurrent rearing and protecting gene erosion. The superior strains/ hybrids are identified using either of the three genetic parameters: general combining ability, special combining ability or heterosis for important biological and silk yielding traits (Sahan, 2020). Biological and silk yielding traits are under multiple gene control and are also affected by nutrition and rearing conditions (Mirhosseini et al, 2005;Zhao et al, 2007;Hemmatabadi et al, 2016).…”
Section: Discussionmentioning
confidence: 99%
“…The primary objective of silkworm hybridization is to evolve robust strains to replace the old ones. The new strains are resistant to diseases, and have high productivity potential and environment adaptive compared to earlier strains (Kang et al, 2004;Sahan, 2020). Scores of hybrids have been synthesized with superior biological traits like fecundity, egg hatchability, larval development, pupation rate and silk yielding traits including cocoon weight, cocoon silk percentage, silk yield, silk filament (Talebi et al, 2010;Ghazy, 2012;Ghazy et al, 2017;Fouad, 2020;Sahan, 2020).…”
Authors' Contribution GAB, ZR and MAM conceived and designed the experiments. GAB and MAM conducted rearing and recorded growth and economic cocoon parameters. GAB and ZR measured filament length and anlyzed the data.
“…Apart from improving productivity, hybridization is necessary to set aside the degenerating effect of recurrent rearing and protecting gene erosion. The superior strains/ hybrids are identified using either of the three genetic parameters: general combining ability, special combining ability or heterosis for important biological and silk yielding traits (Sahan, 2020). Biological and silk yielding traits are under multiple gene control and are also affected by nutrition and rearing conditions (Mirhosseini et al, 2005;Zhao et al, 2007;Hemmatabadi et al, 2016).…”
Section: Discussionmentioning
confidence: 99%
“…The primary objective of silkworm hybridization is to evolve robust strains to replace the old ones. The new strains are resistant to diseases, and have high productivity potential and environment adaptive compared to earlier strains (Kang et al, 2004;Sahan, 2020). Scores of hybrids have been synthesized with superior biological traits like fecundity, egg hatchability, larval development, pupation rate and silk yielding traits including cocoon weight, cocoon silk percentage, silk yield, silk filament (Talebi et al, 2010;Ghazy, 2012;Ghazy et al, 2017;Fouad, 2020;Sahan, 2020).…”
Authors' Contribution GAB, ZR and MAM conceived and designed the experiments. GAB and MAM conducted rearing and recorded growth and economic cocoon parameters. GAB and ZR measured filament length and anlyzed the data.
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