Heritability estimates and correlation analysis in bread wheat (Triticum aestivum L.) under normal and late plantings

Abstract

To estimate heritability and correlation coefficients in bread wheat under normal and late plantings, an experiment was carried out at the research farm of Plant Breeding and genetics, The University of Agriculture Peshawar, Pakistan during 2013. Forty wheat genotypes (39 Advance lines and 1 local check) were tested under normal and late sowing in 5×8 alpha lattice design with three replicates. Combined analysis of variance exhibited significant genotype by environment interactions for spikes m^-2, grains spike^-1, 1000-grain weight, bio-mass yield, grain yield and harvest index. Under normal planting assessments of broad-sense heritability for days to heading were (84%), grains spike^-1 (88%), 1000-grain weight (95%), bio-mass yield (89%), grain yield (96%) and harvest index (86%) under late planting estimates of broad-sense heritability for days to heading was (63%), grains spike^-1 (93%), 1000-grain weight (94%), bio-mass yield (88%), grain yield (93%) and harvest index (77%) were calculated. Grain yield showed positive and significant genotypic and phenotypic correlations with spikes m^-2, 1000-grain weight, bio-mass yield and harvest index under both planting conditions. Genotype SRN 19111 was identified to be best for 1000-grain weight, bio-mass yield and grain yield under normal planting while genotype PR-107 exhibited higher grain yield under late planting. Genotype SRN 19111 and PR-107 are recommended for further extensive testing.

Keywords: Heritability; Correlation; Variation; Wheat; Yields

http://dx.doi.org/10.19045/bspab.2017.600123