Exploring the impact of heat stress on inheritance patterns of key agronomic traits in upland cotton (Gossypium Hirsutum L.) through generation mean analysis

Author(s) : Javed Iqbal, Khadim Hussain , Hafiz Muhammad Ijaz, Muhammad Aleem Sarwar, Muhammad Ashfaq, Muhammad Tariq, Muhammad Zafar

Digital object identifier:

https://doi.org/10.52587/JAF040206

Abstract:

The goal of this study is to study the influence of heat stress on the hereditary patterns of different agronomic traits in upland cotton (Gossypium hirsutum L.) by utilizing generation mean analysis. A total of six parental varieties were cultivated in a controlled greenhouse environment, consisting of three heat-tolerant cultivars (CIM-600, Cyto-178, and FH-142) and three heat-susceptible cultivars (Aleppo-1, Marvi and AMSI-38). Following the development of six primary generations resulting from three crosses (CIM-600 × Allepo-1, Cyto-178 × AMSI-38 and FH-142 × Marvi), the seeds were subsequently planted at the farm of the Central Cotton Research Institute, Multan. The dominant component significantly influenced plant height more than the additive component in all crosses under normal conditions. The inheritance of traits in both situations was influenced by epistatic components (i, j, and l), except cross 1 under heat stress. It is worth noting that negative values for component [i] suggest the absence of any fixable additive genetic effect in some crosses. The presence of negative component values [j] in some crosses has led to the proposal of a digenic interaction. Diverse prior investigations have documented both similarities and differences in their respective conclusions.