STUDIES ON THE GENETICAL COMPONENTS USING THE TOP CROSS MATING DESIGN IN MAIZE (Zea mays L.)
Shamarka, S., Darwish, I., Barakat, A., El-Nahas, M. (2020). STUDIES ON THE GENETICAL COMPONENTS USING THE TOP CROSS MATING DESIGN IN MAIZE (Zea mays L.). EKB Journal Management System, 5(7), 343-344. doi: 10.21608/mjppf.2020.171530
Sh. A. El- Shamarka; I. H. Darwish; A. A. A. Barakat; Marwa M. El-Nahas. "STUDIES ON THE GENETICAL COMPONENTS USING THE TOP CROSS MATING DESIGN IN MAIZE (Zea mays L.)". EKB Journal Management System, 5, 7, 2020, 343-344. doi: 10.21608/mjppf.2020.171530
Shamarka, S., Darwish, I., Barakat, A., El-Nahas, M. (2020). 'STUDIES ON THE GENETICAL COMPONENTS USING THE TOP CROSS MATING DESIGN IN MAIZE (Zea mays L.)', EKB Journal Management System, 5(7), pp. 343-344. doi: 10.21608/mjppf.2020.171530
Shamarka, S., Darwish, I., Barakat, A., El-Nahas, M. STUDIES ON THE GENETICAL COMPONENTS USING THE TOP CROSS MATING DESIGN IN MAIZE (Zea mays L.). EKB Journal Management System, 2020; 5(7): 343-344. doi: 10.21608/mjppf.2020.171530

STUDIES ON THE GENETICAL COMPONENTS USING THE TOP CROSS MATING DESIGN IN MAIZE (Zea mays L.)

Menoufia Journal of Plant Production
Article 4, Volume 5, Issue 7, October 2020, Page 343-344  XML PDF (291.64 K)
Document Type: original papers
DOI: 10.21608/mjppf.2020.171530
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Authors
Sh. A. El- Shamarka1; I. H. Darwish1; A. A. A. Barakat2; Marwa M. El-Nahas3
1Prof. of Crop Science, Fac. of Agric., Menoufia Univ.
2Chief Researcher, Maize Research Department – Field Crop Research Institute - Agricultural Research Center
3Associate Prof. of Crop Science, Fac. of Agric., Menoufia Univ.
Abstract
The field experiments were carried out in two successive summer seasons 2014 and 2015 at the experimental farm of the Faculty of Agriculture, Menoufia University, in El-Raheb, Egypt to evaluate yellow inbreed lines of maize through line x tester analysis. A total of twenty-five (Zea mays L.) yellow S4 lines were used to establish the experiment materials. Two testers of yellow maize were used in this investigation to make all possible line x tester crosses. The two testers used in this study were Giza 658 and Sids 3120. Two check verities were used in this investigation their names are single cross Giza 168 and Giza 176.

The most important results

For grain yield (ard/fed), twelve, four and eight top crosses gave higher grain yield compared with the highest check Giza 168 under HD, ND and combined data, respectively. The top crosses L3 x T1 and L3 x T2 were the highest values for grain yield under this study. Therefore, the inbred line L3 was useful in maize breeding programs.
The inbred lines L3, L4, L9, L11 and L14 desirable significant GCA effects for grain yield (ard/fed).
Thirteen top crosses showed significant positive SCA effects for grain yield (ard/fed) under HD, ND and their combined. Also, the top crosses L1 x T2 and L11 x T2 were significant under high plant density.
The top cross L3 x T1 was the higher value of heterosis relative to two check varieties for grain weight per ear weight and grain yield. Also, eight top crosses were highly significant heterosis relative to two check varieties for grain yield (ard/fed).
Keywords
Genetical components; top cross mating design; maize; yellow inbreed lines
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