Vegetos

Abstract

The present study was performed to estimate heritability for yield and yield associated traits using twenty two rice genotypes. Nine parents and their 13 F₄ populations were planted in a randomized complete block design using three replications at The University of Agriculture, Peshawar during 2014 rice crop growing season. Highly significant differences (p<0.01) among the genotypes were observed for days to heading, flag leaf area, days to maturity, culm length, panicle length, grains panicle⁻¹, grain width, 100-grain weight, biological yield, grain yield and harvest index. Significant differences (p<0.05) among the studied genotypes were observed for spikelet panicle⁻¹. Non-significant difference (p>0.05) among the genotypes were revealed for primary branches panicle⁻¹, secondary branches panicle⁻¹ and grain length. F₄ population K-Bas/Kangri-27 exhibited early heading (87 days) and maturity (123 days), while F₄ population Bas-6129/Dok-Bas produced maximum number of primary branches panicle⁻¹ (10), spikelet panicle⁻¹ (199) and grains panicle⁻¹ (177). Bas-6129/Bas-370has showed maximum number of secondary branches panicle⁻¹ (35). K-Bas/Dilrosh displayed maximum 100-grain (3 g) weight, grain length (10 mm) and width (3mm). The F₄ population K-Bas/Kangri-27 manifested maximum biological yield (110.5 g) and grain yield (41.8 g). The F₄ population Kangri-27/K-Bas exhibited high heritability for days to heading (0.71) and 100-grain weight (0.79). Among F₄ population, K-Bas//TN-1 showed high (0.83) heritability for flag leaf area and grain length (0.87), while Dilrosh/K-Bas revealed high heritability for panicle length (0.63) and culm length (0.75). The F₄ population K-Bas/Dilrosh showed high value of heritability for primary branches panicle⁻¹ (0.61) and grains panicle⁻¹ (0.75). On the basis of high heritability and superior performance for yield and yield associated traits, F₄ populations K-Bas/Kangri-27, Bas-6129/Dok-Bas, Bas-6129/Bas-370, Kangri-27/K-Bas, TN-1/K-Bas, Dlrosh/K-Bas, and K-Bas/Dilrosh could be advanced further to develop rice cultivars.