2008 Joint Annual Meeting (5-9 Oct. 2008): Predicting Progeny Performance in Sugarcane from Coefficient of Parentage, AFLP, TRAP and Euclidean Derived Parental Genetic Relationships.
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716-3 Predicting Progeny Performance in Sugarcane from Coefficient of Parentage, AFLP, TRAP and Euclidean Derived Parental Genetic Relationships.



Wednesday, 8 October 2008: 8:45 AM
George R. Brown Convention Center, 370B
Sreedhar Alwala, Louisiana State University - Agronomy & Environmental Management, Louisiana State University, 104 Sturgis Hall, Baton Rouge, LA 70803, Collins Kimbeng, Louisiana State University - Agronomy & Environmental Management, Dept. of Agronomy LSU, 104 MB Sturgis Hall, Baton Rouge, LA 70803, Keith P. Bischoff, Louisiana Agricultural Experiment Station, 2St. Gabriel Research Station, LSU Agricultural Center, St. Gabriel, LA 70776 and Kenneth Gravois, Louisiana State University - Agronomy & Environmental Management, St. Gabriel Research Station, 5755 Lsu Ag. Rd., St. Gabriel, LA 70776
Knowledge of genetic diversity/similarity among parents could be useful in planning crosses in a commercial breeding program.  Genetic similarity (GS) among nine sugarcane parental genotypes was estimated using target region amplification polymorphism (TRAP), amplified fragment length polymorphism (AFLP) markers, coefficient of parentage (f) and euclidean (E) methods.  The TRAP-, AFLP-, f- and E-estimated GS’s relationship to progeny performance was assessed among five bi-parental crosses involving nine parents.   Thirty randomly selected clones from each of the five families were evaluated in a randomized complete block design field trial with two replications during the years 2004 and 2006.  Phenotypic data for stalk height, stalk count, stalk diameter, cane yield and theoretical recoverable sugars (TRS) were collected from which genetic parameters namely family means, genetic variances (σ2g), average mid parental heterosis (AMPH) and percent heterotic clones (PHC) values were calculated.  The ANOVA results indicated that significant differences existed among the clones within families for all the traits.  The results also indicated that heterosis for TRS could be predicted by family means and σ2g.  AFLP-GS could be used as a good predictor of genetic parameters for most of the traits including TRS.  The TRAP-, f- and E-GS could also be used as a good predictor for TRS.  From all the four GS estimates, it was found that divergent crosses have to made to achieve maximum heterosis for the trait TRS however the same could not ascertained for other traits. 
See more of: Genetic Improvement of Sugarcane, Sorghum, and Industrial Crops/Div. C01/Div. C07 Business Meeting
See more of: C01 Crop Breeding & Genetics