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Heritability and Heterosis for Yield and Yield Related Traits in Rice

Heritability and Heterosis for Yield and Yield Related Traits in Rice

Muhammad Ismaeel1,2*, Syed Mehar Ali Shah1, Aziz Ur Rahman1 and Mian Ahmad Raza

1Department of Plant Breeding and Genetics, The University of Agriculture Peshawar, Khyber Pakhtunkhwa; 2Agricultural Research Station Swabi, Department of Agricultural Research, Khyber Pakhtunkhwa, Peshawar, Pakistan.

ismaeelpbg@gmail.com  

ABSTRACT

This research was carried out to assess heritability and heterosis among 30 rice genotypes for yield and related parameters at The University of Agriculture Peshawar-Pakistan, during 2011. Thirty rice genotypes including 14 parents and 16 F1 hybrids were replicated twice in a randomized complete block design (RCBD). Rice genotypes reflected significant differences (P≤0.01) for all the traits. Among the rice parents, Bas-6129 and Bas-370 showed the highest values for grains panicle-1 (214.0) while IR-8 displayed maximum values for spikelets panicle-1 (238.0), 1000-grain weight (30.9 g) and grain yield (0.97 kg m-2). F1 hybrids Dokri-Bas/Bas-6129, DR-92/DR-83, Bas-2008/Kashmir-Bas, IR-8/NIAB-IR-9 and Bas-6129/Dokri-Bas produced maximum spikelet’s panicle-1 (270.0), grains panicle-1 (233.0), 1000-grain weight (31.5 g) and grain yield (0.83 kg m-2), respectively. Maximum values of phenotypic and genotypic coefficient of variations (PCV and GCV) were displayed by the genotypes for grain yield. The rice genotypes manifested high heritability in broad sense for the traits in study except grains panicle-1. F1 hybrid DR-92/DR-83 exhibited maximum better parent heterosis for spikelets panicle-1 (32.3%) and grains panicle-1 (45.1%) while F1 hybrid combinations Bas-2008/Kashmir-Bas and Bas-6129/Dokri-Bas for 1000-grain weight (18.9%) and grain yield (50.0%). Rice parents IR-8, Bas-6129 and Bas-370, based on their excellence for yield and yield related parameters, are recommended for use in future rice hybridization programs while the F1 cross combinations DR-92/DR-83, Bas-6129/Dokri-Bas and Bas-2008/Kashmir-Bas are recommended to develop advance generations and improved rice varieties 

 

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Sarhad Journal of Agriculture

September

Vol. 34, Iss. 3, Pages 494-711

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