DUS characterization of rice (Oryza sativa L.) germplsm

Abstract

Thirty six traditional rice cultivars conserved in germplasm collection of Regional Agricultural Research Station, Nandyal, Acharya N. G. Ranga Agricultural University were characterized for 23 qualitative and six quantitative characters following the Distinctiveness, Uniformity and Stability (DUS) descriptors, as per PPV & FRA, 2007 during kharif 2020. Out of 29 characters studied five characteristics  were found monophormic, ten were dimorphic, five  were of trimorphic,  seven were tetramorphic and decorticated grain  shape recorded five states of expression. This study will be useful for farmers for identification of varieties and researchers for selecting desirable genotypes for breeding programmes and also to register varieties under PPV & FR Act of 2001. Hybridization between parents selected from  cluster III and cluster IV followed by cluster I and cluster IV  and  cluster II and cluster IV with the importance to traits like stem length, test weight and decorticated grain length in segregating populations can be suggested for development of better varieties from this 36 genotypes.