IMPROVING STORAGE ROOT PROTEIN CONTENT IN SWEET POTATO THROUGH OPEN-MATING POLLINATION

Abstract

Normal 0 false false false IN X-NONE X-NONE MicrosoftInternetExplorer4 Normal 0 false false false EN-US X-NONE X-NONE A field experiment was conducted at the Research Station of Brawijaya University from April to August 2009. An augmented, r andomi z e d complete block design with seven blocks was utilized with seven parental clones as standard treatment s and seven half-sib families as augmented treatmen ts . E ach block consisted of seven parental clones plus one randomly assigned family of half-sibs. In addition , the first block contained 29 accessions, the 2 nd block had 120, the 3 rd block had 194, the 4 th block had 45, the 5 th block had 28, the 6 th block had 186, and the 7 th block had 108. Ten cuttings of each parental clone was planted in each block, along with a single plant of each accession at a spacing of 75 cm in the row and 100 cm between the rows. There were five improved clones identified with high protein content and high yield . Broad-sense heritability and genetic advance of storage root weight, storage root number, percentage dry matter and protein content were high, whereas vegetative biomass and harvest index were low. The result s showed that storage root weight, storage root number, percentage dry matter and protein content could be used as the basis for a crop improvement program in sweet potato. Keywords: broad sense heritability, expected genetic advance, improved clones, high yied, protein content , sweet potato