Heterosis and Combining Ability Estimation for Yield,Yield Components and Grains Quality Traits in Maize (Zea mays L.) | ||||
| Journal of Plant Production | ||||
| Article 5, Volume 13, Issue 7, July 2022, Page 315-319 PDF (940.38 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2022.126711.1097 | ||||
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| Authors | ||||
A. N. E attia  1; A. M. El-Galfy2; Soad H. Hafez1; Tasneem S. S. ELbehary1
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| 1Department of Agronomy, Fac. of Agric., Mansoura University, Egypt. | ||||
| 2Department of Maize Research, Institute of Field Croup, Agricultural Resarch Center, Egypt . | ||||
| Abstract | ||||
| In Experimental Farm of Agronomy Department, Faculty of Agriculture, Mansoura University, Egypt, season 2020, Heterosis and compining ability was studied in ten F1 single crosses with five parents (Sd12 , Inbred bo12 , 72 , Rg8 ,and 56) planted in a Randomized complete Block Design (RCBD) with 3 replicates. The analysis of variance showed highly significant mean squares of general combining ability (GCA) and specific combining ability (SCA) for all studied traits, i.e. length of ear, weight of ear, No. of grains per ear, 100-grain weight, shelling % and grain yield for each plant, protein %, carbohydrate % and oil %, except GCA for ear diameter and GCA and SCA for cub diameter. The proportion of GCA/SCA was fewer than unity for all considered traits. GCA effects achieved that inbred lines P1 (Sd12) and P4 (Rg8) they were perfect general combiners for grain/plant yield. Highly significant rates of SCA effects showed that the best F1 cross combinations were P1 xP3, P1 xP4, P2 xP5 and P3×P4 for grain yield / plant .The most of cross combinations manifested positive and very significant heterosis over mid and better parents for all traits studied except number grain per ear and carbohydrates percentage for better parent and shelling percentage for over mid and better parents. Highest positive significant value of heterotic effects relative to mid and better parents for grain yield per plant were obtained by P1xP4. | ||||
| Keywords | ||||
| Heterosis; Specific combining ability (SCA); General combining ability (GCA); Maize; Zea mays | ||||
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