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[9001929.] رقم البحث : 9001929 - |
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Genetic Variance, Heritability and Genetic Advance for Some Agronomic Traits in Some Sugarcane Genotypes / التباين الوراثي والتوريث لبعض الصفات الزراعية في سلالات قصب السكر |
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قطاع الدراسات الزراعية / |
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Egyptian sٍugar journal / / vol.10 - 5/7/2018 |
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اسماء فتحى محمود - مؤلف رئيسي |
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Walied Eldesouky |
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sugar technology
sugarcane |
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The present study was carried out at the breeding station of Hawamdia Sugarcane Research Station (HSCRS), Giza, Egypt to examine the response of the 36 sugarcane genotypes of sugarcane for floral induction. and evaluate the genetic potential of six families of sugarcane during the cultivation in the first selection cycle for seven traits,i.e., stalk length , stalk diameter, stalk weigth, stalk number/stool, stool yield, brix % and pith . The analyses of the variance of sex comparisons of the bi-parental showed that there were statistical differences among the families that were estimated for all characteristics under this study. Differences between families were higher than differences within the family for all studied traits. 14 full-sib families, i.e. 94/181-1x 87/29-1, 94/181-1 x EN3-4, 94/181-1 x EH16-1, 82/4-21 x 2006/170-40,82/4-21 x EH128-2,82/4-21 x IK84,82/4-21 x B36-21,82/4-21 x EI45-43,PH7115 x B36-21,2004/119-2 x 2005/287-1,2004/119-2 x CP82/1592,EN3-4 x CP57-614,G10 x 2006/294-11 and G10 x PR1013 were the best families overall other full-sib families for most studied characters, indicating the efficient of selection within these families. High genetic coefficient of variation estimates (GCV %) were observed for stalk weight (26.82%), stalk number per stool (20.00%) and stool yield (35.38%), indicating the effectiveness of selection among evaluated families for these traits and selection within families for the other traits in the next stage would be more effective. Genetic gains expected from selection of the top 50% among families followed by a 20% individual genotype selection within elite families would be much larger than those expected from simple mass selection of the best 10%. The combined family and within family selection were about 15.5, 1.4, 21.00, 2.16, 10.3,4.18 and 0.05 times better than individual selection alone for stalk length, stalk diameter, stalk weight, stalk number per stool, stool yield , Brix, and pith, respectively. |
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