Genetic variability analysis of wheat (Triticum aestivum L.) genotypes for yield and related parameters

Abstract

The present experiment was conducted to find out the genetic variability in 100 different wheat genotypes/germplasms at Agricultural Research Station Baffa, Mansehra, Pakistan. The experiment was laid out in RCBD with three replications. The results of statistical analysis showed significant differences among genotypes for all characters like days to heading, days to maturity, plant height (cm), number of grain/spike, spike length (cm), 1000 grain weight (g), biological yield (tons/ha), grain yield (tons/ha) and harvest index (%). Genetic diversity among genotypes reflect their broad genetic background. The days to heading ranged from 109 to 141 showed by genotypes 3032 and 3008, maturity from 142-184 days by genotypes 3032 and 3023, plant height from 83 to 125 cm by genotypes 3002 and 3077, number of grains/spike from 19 to 75 by genotypes 3173 and 3082, spike length from 8.10 to 12.30 cm by genotypes 3173 and 3082, 1000 grain weight from 21 to 64 gram by genotypes 3148 and 3015, biological yield from 9.30 to 17.50 tons/ha by genotypes 3004 and 3082, grain yield from 1.80 to 5.90 tons/ha by genotypes 3078 and 3082 and harvest index from 14.17 to 44.73 % by genotypes 3144 and 3015. The significant genetic diversity amongst wheat germplasms were recorded in this experiment. Genetic variability analysis revealed that genotypes 3015, 3032 and 3082 were the most promising ones and it is suggested that these lines may be focused and involved in future wheat breeding programme. The use of reported genetic diversity will assist wheat breeders for development of high yielding varieties in future.

Estimation of genetic variability in wheat (Triticumaestivum L.)

“…The significant differences have been observed among treatments, parents, parents (lines), parents (testers), parents (Lines Vs Testers) and parents Vs crosses for all the characters except days to maturity and days to flowering (75%), phenol color reaction in Parents (testers), days to flowering (75%), number of spikelets/spike, biological yield/plant (gm), seed hardness, phenol color reaction in parents (lines Vs testers), flag leaf area (cm) 2 in parents Vs crosses (Table-1). The same result is indicated by Cheema et al, (2006) [3] , Desheva and Kyosev (2015) [8] , Ghaffar et al, (2018) [6] . In the present investigation, in general, the mean, range performance and genotypic coefficient of variation and phenotypic coefficient of variation of the parents and F1s for all eight characters are presented in Table no.…”

Performance of potential parents for a rainfed tropical wheat breeding program

“…Such differences are associated with macroenvironmental factors, especially the technological management in Itutinga, with improvement in soil structure and fertility and a greater presence of straw, which helps maintain moisture (Thind et al 2019) Multi-location analysis (Table 3) showed that the genetic variance (σ 2 g ) among cultivars, free of the cultivar × location interaction, was not null (P < 0.05) for HGT and W1000, and not significant for HW and YLD. As Ghaffar et al (2018)…”