Genetic Analysis of Two Bread Wheat Crosses (Triticum Aestivum L.) Using Six Populations Techniques

Kandil, A. A.; Abdel-Moneam, M. A.; Hafez, Soad H.; Gomaa, Hasnaa S.

doi:10.21608/jpp.2022.123572.1094

Genetic Analysis of Two Bread Wheat Crosses (Triticum Aestivum L.) Using Six Populations Techniques

Document Type : Original Article

Authors

Agron. Dept., Fac. of Agric., Mansoura Univ., Egypt.

10.21608/jpp.2022.123572.1094

Abstract

Non-allelic interaction scaling test (A, B, and C) coupled with joint scaling test x₂ and six parameters model were applied to test the adequacy of genetic model and estimates the genetic components for days to heading, flag leaf area, number of spikes / plant, number of grains/spike, 1000-grain weight and grain yield/plant using six populations (P₁, P₂, F₁, F₂, BC₁ and BC₂) of two wheat crosses; Gemmeiza11 × Misr1 and Gemmeiza 12 × Misr2, A randomized complete block design with three replications was used. The obtained results indicated the importance of additive genetic variance (D) in the genetic control of days to heading and flag leaf area for Gimmeiza 12 × Misr 2 and amount of spikes/plant in two crosses. Heritability in narrow sense was more than 0.50. While the dominance genetic variance (H) was found to be the prevalent type controlling for the remaining characters in two crosses, the value of (H/0)⁰⁵ was more than one for these characters and heritability in narrow sense as less than 0.50. The non-allelic interaction (A, B and C) coupled with joint scaling test (X₂) revealed that simple genetic model was adequate for explaining the inheritance of amount of spikes/plant for Gemmeiza 12 X Misr1, epistasis played a great role of controlling remaining characters in two crosses. Additive (d) and additive X dominance (J) were significant for days to heading and number of grains /spike (in twocrosses), 1000 grain weight and grain yield / plant in two crosses cross (Gemmeiza × Misr 2).

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