Abstract
Germplasm as a source of genes in sweetpotato breeding requires information on appearance and genetic parameters. The objectives of this research were to determine the performance and genetic parameters of sweet potato accessions. The research was conducted at Kendalpayak Research Station, Malang, East Java, Indonesia. The materials used were thirty sweet potato accessions from Indonesian Legumes and Tuber Crops Research Institute (ILETRI) germplasm collection. The research was arranged in a Randomized Block Design (RBD) with two replications. The variables observed included: the vines length, the weight of vines, the number and weight of the saleable root per plot, the number and weight of the non-saleable root per plot, the number and weight of root per plant, the root yield, the harvest index, and the dry matter content. The results of ANOVA showed a significant difference among the tested genotypes in almost all traits observed except on weight of non-saleable root. PCV estimation was higher than GCV estimation for all the observed characters. The weight of the saleable root per plot, the weight of root per plant, and the root yield that showed a wide range of PCV and GCV as well as high broad-sense heritability indicated that these traits had additive gene effect and more reliable for effective selection. The broad GCV in a population is effective for selection to obtain the superior variety.
Highlights
Sweet potato (Ipomoea batatas L.) is one of the important staples food in Indonesia
PCV estimation was higher than genotypic coefficient of variation (GCV) estimation for all the observed characters
Results of this study showed that based on broad GCV dan high heritability, the weight of the saleable root per plot, the weight of root per plant, and the root yield are more reliable for effective selection
Summary
Sweet potato (Ipomoea batatas L.) is one of the important staples food in Indonesia. It is the fourth source of carbohydrate after rice, corn and cassava. It contain fiber, vitamins, minerals, antioxidants, and have a low glycemic content. Sweet potatoes play an important role in the supply of industrial raw materials and animal feed (Wera et al, 2014; Pradhan et al, 2015). The development and improvement of sweet potato’s productivity is needed to meet those needs. Productivity improvements can be made through the breeding programs
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