Yield and blast resistance evaluation of upland rice lines with new plant type characters

Abstract

The present studies were conducted to determine agronomic characters, genetic variability, broad sense heritability (h2 bs) and blast resistance of doubled haploid rice lines and to obtain new plant type (NPT) of upland rice with high yield potential and blast resistant. The research was conducted in Bogor and Sukabumi, Indonesia started from November 2010 to June 2011. There were 14 genotypes evaluated namely the new lines of rice from anther culture (FG1-66-2-1, FG1R-108-1-1, FG1R-51-2-1, FM1-14-1-1, FM1-14-1-2, FM1-25-1-1, FM1-25- 1-2, FM1-57-1-2, FM1R-32-1-1, FM1R-23-1-1, FG2-47-1-3, FM1R-19-2-4, FM2-12-1-1, FAT-4-1-2), as well as Fatmawati, Limboto and Batutegi as check varieties. The experimental design used was randomized block design (RBD). The results showed that there was variability on agronomic traits and blast resistance among lines evaluated. FG2-47-1-3 did not have complete characters of NPT, but the line had superior characteristics such as high percentage of filled grain, medium days to harvest, medium height, medium 1000-filled grain weight, stay green when harvested and high resistance to blast disease. The results also indicated that the tested population had high heritability (h2 bs) in leaf blast and neck blast resistance, plant height, filled grain per panicle, days to harvest, number of grain per panicle and 1000-filled grain weight. They showed high variance coefficient for leaf blast and neck blast resistance, flag leaf length and percentage of filled grain.