Combining Ability Estimates Using Line × Tester Analysis to Develop High Yielding Maize Hybrids

T. A. E. Abdallah

doi:10.12816/0011671

Article Details

Combining Ability Estimates Using Line × Tester Analysis to Develop High Yielding Maize Hybrids

Authors:

T. A. E. Abdallah

Publisher:

Egyptian Society of Plant Breeding

Main Topics:

Agriculture

Journal:

Egyptian Journal of Plant Breeding 2014 Vol.18 Issue 1, pp.45-55

Document Type:

Article

Publication Date:

3/2014

Document Language:

English

Document ID (Org No.):

64815

Frequency:

Quarterly

pISSN:

11107863

DOI:

10.12816/0011671

Descriptors:

Keywords:

Abstract:

 A line x tester analysis involving 20 testcrosses generated by 10 elite yellow maize inbred lines with two testers was conducted to evaluate grain yield and yield related traits during 2012 growing season at three locations, i.e., Sakha, Mallawy and Ismaelia Agricultural Research Stations. The objectives of the study were to estimate general and specific combining ability effects at the inbred lines and to evaluate the best cross performance of the hybrids compared to two standard checks for grain yield and its components. Analysis of variance indicated significant mean squares due to crosses for ear length, ear diameter, number of rows per ear, number of kernels per row, 200 kernels weight, and grain yield. The total variance is further partitioned into variance due to lines, testers and their interaction. The magnitude of general combining ability variance was much greater than specific combining ability variance for all studied traits, except for ear length and number of kernels per row, indicating the preponderance of additive gene action for these traits. Among the lines, the inbred line L3 (Gz 658) was found as the best general combiner for grain yield and most of the yield component traits followed by L6 (Gz 661) and L7(Gz 662). Considering the two inbred testers, T1 was best general combiner for ear diameter and number of rows per ear. Among the crosses, four crosses were found to be the superior with positive and significant SCA effects and better mean performance for grain yield. Similar superior positive and significant SCA effects were also observed in three crosses for ear length and one cross for number of kernels per row.

 تم استخدم تحليل القدرة على الائتلاف لصفة المحصول ومكوناته وذلك بعمل تهجين قمي بين عدد 10 سلالات صفراء الحبوب مع سلالتين جديدتين ككشافين وذلك لتقدير تباينات القدرة العامة والخاصة للائتلاف وكذلك تأثيراتها. في موسم 2012 تم تقييم ال20 هجين قمي مع هجيني المقارنة (الهجين الفردي الاصفر جيزة 162 وجيزة 168 ) في ثلاث محطات بحثية تابعة لمعهد المحاصيل الحقلية-مركز البحوث الزراعية وهي سخا وملوى والاسماعيلية. وقد دلت النتائج على وجود فروق عالية المعنوية بين الهجن في جميع الصفات تحت الدراسة. كما اظهرت السلالات جيزة 658 و661 و662 تأثيرات عالية المعنوية وموجبة للقدرة العامة علىالائتلاف لصفة المحصول ومعظم صفات مكونات المحصول. اظهرت اربعة هجن فردية أعلى معنوية موجبة للقدرة الخاصة علىالائتلاف وأيضا أفضل أداء لصفة المحصول. كما اظهرت ثلاثة هجن فردية تفوقا معنويا موجبا للقدرة الخاصة علىالائتلاف لصفة طول الكوز وهجين واحد لصفة عدد الحبوب في الصف.

Article Details

Combining Ability Estimates Using Line × Tester Analysis to Develop High Yielding Maize Hybrids

Authors:

T. A. E. Abdallah

Publisher:

Egyptian Society of Plant Breeding

Main Topics:

Agriculture

Journal:

Egyptian Journal of Plant Breeding 2014 Vol.18 Issue 1, pp.45-55

Document Type:

Article

Publication Date:

3/2014

Document Language:

English

Document ID (Org No.):

64815

Frequency:

Quarterly

pISSN:

11107863

DOI:

10.12816/0011671

Descriptors:

CEREAL CROPS

SORGHUM GRAIN

MAIZE

COMBINING ABILITY

EGYPT

Maize

Line x Tester

Combining ability

GCA effects

SCA effects

Issues

Article Details

Authors: T. A. E. Abdallah

Publisher: Egyptian Society of Plant Breeding

Main Topics: Agriculture

Journal: Egyptian Journal of Plant Breeding 2014 Vol.18 Issue 1, pp.45-55

Document Type: Article

Publication Date: 3/2014

Document Language: English

Document ID (Org No.): 64815

Frequency: Quarterly

pISSN: 11107863

DOI: 10.12816/0011671

Descriptors:

Issues

Authors:

T. A. E. Abdallah

Publisher:

Egyptian Society of Plant Breeding

Main Topics:

Agriculture

Journal:

Egyptian Journal of Plant Breeding 2014 Vol.18 Issue 1, pp.45-55

Document Type:

Article

Publication Date:

3/2014

Document Language:

English

Document ID (Org No.):

64815

Frequency:

Quarterly

pISSN:

11107863

DOI:

10.12816/0011671