Sugarcane Family And Individual Clone Selection Based On Best Linear Unbiased Predictors (BLUPS) Analysis At Single Stool Stage
Abstract: A field trial was carried out to evaluate 544 sugarcane clones (genotypes) and 3 check cultivars under un-replicated augmented design with eight unbalanced blocks at Giza Agricultural Research Station, Egypt (latitude of 30° 0' N, and longitude of 31° 12' E) in 2016/2017 seasons. The present work deals with the estimation of variance components, heritability, prediction accuracy and efficiency of selection in a population of 19 sugarcane families at single stool stage of breeding program using REML/BLUP (Restricted Maximum Likelihood/Best Linear Unbiased Prediction). Based on one-way and augmented block design without replication, the results showed low genetic variability among the evaluated families in stalk length, diameter, weight and number per stool. The narrow-sense heritability estimates ranged between the lowest (5.98%) for stalk number/stool to the highest (52.06%) for Brix%. Analysis of variance revealed significant differences among the evaluated clones for all the traits. The mean estimated through components via BLUP facilitated the selection of six families; number (1, 10, 3, 9, 17 and 2) as superior ones, respectively. The use of the augmented block design without replication in family selection experiments proved inadequate due to the low estimates of selective accuracy and family mean heritability. Owing to the large number of families and the use of the REML/BLUP procedure, either using or not using the checks in the analysis did not alter the estimated genetic parameters. Based on the individual BLUP in sugarcane selection, high differences within family for the yield main components were detected. The highest genotypic effects and high-predicted values for stalk weight per stool were recorded by the sugarcane clones number (375, 495, 31 and 359), while the highest for Brix% were recorded by clone’s number (429, 259, 432 and 258). The results suggested that individual clone selection by BLUP procedure could indicate a higher number of promising clones for quantitative traits within families with high genotypic effects.
Publication year 2018
Pages 155 – 168
Organization Name
Author(s) from ARC
Publication Type Journal
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