Combining Ability of Seven New White Maize Inbred Lines for Yield and Some Agronomic Traits

2014 ◽  
Vol 19 (1) ◽  
pp. 15-24
Author(s):  
M. A. M. El-Ghonemy
Keyword(s):  
Combining Ability ◽  
Agronomic Traits ◽  
Inbred Lines ◽  
Maize Inbred Lines

scholarly journals Combining Ability Study for Grain Yield and Agronomic Traits of Quality Protein Maize (Zea mays L.) Inbred Lines Adapted to Mid-Altitude Agroecology of Ethiopia

2021 ◽  
Vol 4 (3) ◽  
pp. 286-304
Author(s):  
Lemi Mideksa Yadesa ◽  
Sentayehu Alamerew ◽  
Berhanu Tadesse
Keyword(s):  
Grain Yield ◽  
Combining Ability ◽  
Agronomic Traits ◽  
Inbred Lines ◽  
Quality Protein Maize ◽  
Lattice Design ◽  
Maize Cultivars ◽  
Maize Inbred Lines ◽  
Maize Varieties ◽  
Almost All

In spite of the importance of quality protein maize to alleviate protein deficiency, almost all maize varieties cultivated in Ethiopia are normal maize varieties, which are devoid of lysine and tryptophan. Perusing the combining ability of QPM inbred for grain yield and its components is vital to design appropriate breeding strategies for the development of nutritionally enhanced maize cultivars. A line x tester analysis involving 36 crosses generated by crossing 9  elite maize inbred lines with 4 testers were evaluated for different desirable agronomic traits during the 2019 main season at BNMRC and JARC. The experiment was conducted using alpha lattice design with 3 replications. The objectives were to determine the combining ability of quality protein maize inbred lines, adapted to mid altitude agroecology of Ethiopia for agronomic traits. The crosses were evaluated in alpha lattice design replicated 3 times. Analyses of variances showed significant mean squares due to crosses for almost all the traits studied. GCA mean squares due to lines and testers were significant (P<0.05 or P<0.01) for most studied traits. SCA mean squares were also significant for most attributes across locations. The comparative importance of GCA and SCA variances observed in the current study for most studied traits indicated the preponderance of additive genetic variance in governing these attributes. Only L3 was the best general combiner for grain yield. Inbred line L3, for days to anthesis and L5 for days to silking had negative and significant GCA effects. L5 and L6 displayed negative and significant GCA effects for plant and ear height. Crosses, L2xT4, L3xT4, L4xT4, L5xT2, L6xT3, L7xT2, L9xT1 and L9xT4 were good specific combiners for grain yield. In general, these genotypes help as a source of promising alleles that could be used for forthcoming breeding work in the development of quality protein maize cultivars with desirable traits.

Combining Ability for Yield and Some Agronomic Traits of Seven White Maize Inbred Lines

2013 ◽  
Vol 17 (2) ◽  
pp. 13-22
Author(s):  
A. A. Abd El-Mottalb ◽  
M. A. Mostafa ◽  
H. A. A. Gamea
Keyword(s):  
Combining Ability ◽  
Agronomic Traits ◽  
Inbred Lines ◽  
Maize Inbred Lines

Combining Ability of Traits Related to Nitrogen Use Efficiency in Eighteen Maize Inbred Lines

2014 ◽  
Vol 40 (5) ◽  
pp. 838 ◽  
Author(s):  
Chao CUI ◽  
Ju-Lin GAO ◽  
Xiao-Fang YU ◽  
Zhi-Jun SU ◽  
Zhi-Gang WANG ◽  
...  
Keyword(s):  
Nitrogen Use Efficiency ◽  
Combining Ability ◽  
Inbred Lines ◽  
Nitrogen Use ◽  
Maize Inbred Lines ◽  
Use Efficiency

Combining Ability of Maize Inbred Lines from Shaan A Group and Shaan B Group under Different Density Conditions

2017 ◽  
Vol 43 (9) ◽  
pp. 1328 ◽  
Author(s):  
Bo-Xin WANG ◽  
Ya-Hui WANG ◽  
Peng-Fei CHEN ◽  
Xu-Dong-Yu LIU ◽  
Zhi-Qian FENG ◽  
...  
Keyword(s):  
Combining Ability ◽  
Inbred Lines ◽  
Maize Inbred Lines
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