PHENOTYPIC PERFORMANCE OF SOME PROMISING BASMATI ADVANCED LINES (Oryza saliva L.) AT DIFFERENT ENVIRONMENTS

Abstract

An experiment was conducted in the experimental bnn of Shcr-e-I4angla Agricultural University. Dhaka, langladesh during the period Iioni June to December 2005 to study on the phenotypic performance of some promising I3asmati advanced lines (Or)'za sativaL.) at differeol environments. in this research work, the seeds of three I3asmati advanced lines and I3RRI dhan38 as check were used. The data obtained for ditlërcnt characters were statistically analyzed to find out the significance of the ditiCrence among the treatment combination. Genotypic and phenotypic coefficient of variation, heritability and genetic advanced were also estimated. The maximum days to 50% flowering weit recorded for the cultivar 131(1(1 dhan38 (110.25 days) while the minimum was recorded for 5-2 (91.25 days). The maximum days to maturity (141 days) were recorded for the cultivar BRRI dhan38 and the minimum was recorded for S-2 (122.75 (lays) and 5-5 (123.25 days). The highest yield per hectare was recorded for the cultivar I3RRF dhan38 (4.47 ton) and the lowest was recorded for 8-5 (3.81 it)!)). [he maximum days to 50% flowering were recorded from 15 July planting time (98.75 days) and the minimum was recorded for l' September planting time (94.5 (las). The maximum days to maturity (130.25 days) was recorded from I 5l July planting. while the minimum was recorded for V' September and 151h August planting time (126.25 days). The highest yield per Iteetare was recorded from I" August planting (4.33 ton) and the lowest was recorded for 15th August planting time (3.94 ton). The phenotypic variance (360.17) was slightly higher than the genotypic variance (330.53) for days In 50% liowering indicating high environmental influence on this characters which was supported by narrow difference between phenotypic (19.68%) and genotypic (18.85%) co-efficient of variation. Days to maturity in terms of phenotypic variation (342.01) was slightly higher than the genotypic variance (307.23) for indicating high environmental influence on this characters which was supported by narrow diiThrcnce between phenotypic (14.47%) and genotypic (13.72%) coefficient of variation. The phenotypic variance (0.33) was slightly higher than the genotypic variance (0.30) for yield per hcetare indicating high environmental influence on this characters which was supported by narrow difference between phenotypic (14.16%) and genotypic (14.16%) co-efficient of variation. Days to 50% flowering in rice cultivars independent of species showed significant positive association with days to maturity (0.925), plant height (0.906) and harvest index (0.958). Significant positive association was recorded for 1000 grain weight in rice cultivars independent of species showed with panicle length (0.689). efThetive tillers per hill (0.658), filled grain per panicle (0.569). spikelet ICrtility (0.748) and yield (0.754). Positive signilicant association was recerded for yield per heetare in rice cultivars with panicle length (0.784). effective tillers per hill (0.694). filled grain per panicle (0.569), spikelet fertility (0.906), plant height (0.509) and 1000 grain weight (0.754).