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Venkata, Arjuna Rao Palakollu,Kumari, Panda Kusuma,Dev, Tavva Surya Santosh Mohan,Rao, Muktinutalapati Venkata Subba,Manga, Vangury 한국작물학회 2012 Journal of crop science and biotechnology Vol.15 No.3
Genetic analysis of sodium and sodium/potassium (Na/K) ratios in leaf and stem was carried out through diallel analysis involving two tolerant, one moderately tolerant, and two sensitive genotypes as parents. Three-week-old seedlings were subjected to a critical level of salinization (17 decisiemens per meter of electrical conductivity). Leaf and stem sampling (from 5 parents and 20 hybrids arranged in a randomized block design with three replications of 10 each) was done 30 days after salinization when susceptible parents were severely effected. Predominance of non-additive gene action for stem sodium and dominance component for leaf Na/K were noticed while both additive and non-additive components played a significant role for stem Na/K. A single group of genes seems to be operative for these characters. Hybrids produced by crossing the two sensitive parents were tolerant suggesting genetic complementation and involvement of different loci in the two parents for salinity tolerance. The overall dominant nature of tolerance and the additive gene action for these salinity related characters suggested the possibility of breeding pearl millet lines through hybridization and selection to pyramid the favorable genes.
Arjuna Rao Palakollu Venkata,Panda Kusuma Kumari,Tavva Surya Santosh Mohan Dev,Muktinutalapati Venkata Subba Rao,Vangury Manga 한국작물학회 2012 Journal of crop science and biotechnology Vol.15 No.3
Genetic analysis of sodium and sodium/potassium (Na/K) ratios in leaf and stem was carried out through diallel analysis involving two tolerant, one moderately tolerant, and two sensitive genotypes as parents. Three-week-old seedlings were subjected to a critical level of salinization (17 decisiemens per meter of electrical conductivity). Leaf and stem sampling (from 5 parents and 20 hybrids arranged in a randomized block design with three replications of 10 each) was done 30 days after salinization when susceptible parents were severely effected. Predominance of non-additive gene action for stem sodium and dominance component for leaf Na/K were noticed while both additive and non-additive components played a significant role for stem Na/K. A single group of genes seems to be operative for these characters. Hybrids produced by crossing the two sensitive parents were tolerant suggesting genetic complementation and involvement of different loci in the two parents for salinity tolerance. The overall dominant nature of tolerance and the additive gene action for these salinity related characters suggested the possibility of breeding pearl millet lines through hybridization and selection to pyramid the favorable genes.
Diatta Cyril,Tovignan Thierry Klanvi,Akata Eyanawa Atchozou,Ifie Beatrice Elohor,Sarr Mame P.,Bassene César,Aidara Ousmane,Ndione Pierre Alfred,Gackou Malick,Manga Anicet Georges Bruno,Danquah Eric Yi 한국작물학회 2022 Journal of crop science and biotechnology Vol.25 No.2
Increasing sorghum production per unit area in the farmer’s feld by developing high yielding tannin-free and grain mold tolerant varieties in Senegal is the goal of the present study. Line×tester mating design was used to cross eleven tannin-free non-photoperiodic male fertile sorghum varieties with two male-sterile A-lines to produce 22 F1 hybrids. These hybrids along with the thirteen parents and one grain mold resistant hybrid check were evaluated under natural grain mold infestation in two contrasted sites using a 6×6 lattice design with three replications. Results on combining ability suggested that additive gene actions were important in the control of grain mold resistance while non-additive gene actions were preponderant in the inheritance of grain yield. The parental lines F2-20, Macia, Faourou, and Dorado were the best general combiner for grain mold resistance. Of these, Dorado was identifed as the best combiner for yield and yield components. Additionally, the hybrid CE310-31A×Sureño was identifed as the best hybrids combination for yield, yield components and grain mold resistance. Furthermore, the hybrid crosses CE310-31A×F2-20, CE310-31A×Sureño and AVG-1×Dorado showed the best mid-parent heterosis for grain yield and resistance to grain mold. Moreover, based on their combining ability and heterosis, seven hybrids were identifed for their resistance to grain mold and high yielding. These hybrids could be tested in multilocation trials for a subsequent release.