Author(s)

Sujon Kumar^1,2,3*, Abul Bashar Mohammad Khaldun⁴, Mohammad Mosiur Rahman⁵, Mohammad Mazadul Islam⁶, Mohammad Shalim Uddin⁴, Mohammad Abdul Latif Akanda⁴

¹Triticeae Research Institute, Sichuan Agricultural University, Chengdu, China.
²Department of Biotechnology and Genetic Engineering, University of Development Alternative, Dhaka, Bangladesh.
³College of Agricultural Sciences, International University of Business Agriculture and Technology, Dhaka, Bangladesh.
⁴Oilseed Research Centre, Bangladesh Agricultural Research Institute, Gazipur, Bangladesh.
⁵Pulses Research Centre, Bangladesh Agricultural Research Institute, Gazipur, Bangladesh.
⁶Tuber Crops Research Centre, Bangladesh Agricultural Research Institute, Gazipur, Bangladesh.

The current study was conducted in the experimental field of the Department of Biotechnology and Genetic Engineering, Faculty of Life Science, University of Development Alternative, Dhaka, Bangladesh during the winter season 2017-2018. The study was performed to reduce the heterotic effect and phenotypic correlation among numerous yield characters for F₁ hybrids of hexaploid wheat (Triticum aestivum L.). The experimental design has consisted of six parental variants (Sonalika, Balaka, Prodip, Kanchan, Agrahani and Protiva), which were crossed and nine possible cross combinations (F₁ hybrids) (Prodip × Agrahani, Balaka × Agrahani, Prodip × Protiva, Protiva × Agrahani, Agrahani × Kanchan, Kanchan × Sonalika, Protiva × Prodip, Sonalika × Agrahani, and Prodip × Kanchan) were obtained. The experimental fields were selected and arranged in a randomized complete block design with four replicates, where eight characters were studied. The mean square of the analysis of variance showed that the hybrids differed significantly (p ≤ 0.01) for all studied characters except for maturity to 75% of days and height of the plant, while the parents only had no differences in grain yield. The mean square of the parent and the F₁ hybrid indicated that considerable heterosis existed in the F₁ hybrids. In general, correlation coefficients indicated that the maturity to 75% of days was significant but negatively correlated with most of the yield traits, suggesting that the genotypes which became mature early may have lower yields. Plant height was also negatively correlated with grain spike⁻¹, seed index, and harvest index. The grain yield plant⁻¹ was significant and positively correlated with all yield traits. Correlation indicates that single or multiple production-related ingredients can be used as selection time to select plants with higher yield traits with larger grains.

Wheat, Heterosis, Correlation, Genotypes, Yield

Kumar, S. , Khaldun, A. , Rahman, M. , Islam, M. , Uddin, M. and Akanda, M. (2021) The Outbreeding Enhancement and Correlation Studies in F₁ Hybrids of Hexaploid Wheat (Triticum aestivum L.) Cultivars. Agricultural Sciences, 12, 805-826. doi: 10.4236/as.2021.128052.