scholarly journals Combining ability analysis of quality protein maize (QPM) inbred lines for grain yield, agronomic traits and reaction to grey leaf spot in mid-altitude areas of Ethiopia

2017 ◽  
Vol 12 (20) ◽  
pp. 1727-1737 ◽  
Author(s):  
Tilahun Bitew ◽  
Dida Midekisa ◽  
Deresa Temesgen ◽  
Garoma Belay ◽  
Demissie Girma ◽  
...  
Keyword(s):  
Grain Yield ◽  
Combining Ability ◽  
Leaf Spot ◽  
Agronomic Traits ◽  
Inbred Lines ◽  
Quality Protein Maize ◽  
Grey Leaf Spot ◽  
Combining Ability Analysis

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 analysis for Phaeosphaeria leaf spot resistance and grain yield in tropical advanced maize inbred lines

2011 ◽  
Vol 120 (1) ◽  
pp. 86-93 ◽  
Author(s):  
Julia Sibiya ◽  
Pangirayi Tongoona ◽  
John Derera ◽  
Neil van Rij ◽  
Itai Makanda
Keyword(s):  
Grain Yield ◽  
Combining Ability ◽  
Leaf Spot ◽  
Inbred Lines ◽  
Maize Inbred Lines ◽  
Combining Ability Analysis

Combining Ability Analysis of RILs Developed from a YML32 × Q11 Cross for Grain Yield and Resistance to Gray Leaf Spot

Crop Science ◽  
2018 ◽  
Vol 58 (3) ◽  
pp. 1070-1081 ◽  
Author(s):  
Z. W. Li ◽  
L. Liu ◽  
Y. D. Zhang ◽  
D. P. Jeffers ◽  
M. S. Kang ◽  
...  
Keyword(s):  
Grain Yield ◽  
Combining Ability ◽  
Leaf Spot ◽  
Gray Leaf Spot ◽  
Combining Ability Analysis

Genetic and agronomic evaluation of short-season Quality Protein Maize

1992 ◽  
Vol 72 (4) ◽  
pp. 1171-1181 ◽  
Author(s):  
D. Spaner ◽  
D. E. Mather ◽  
R. I. Hamilton
Keyword(s):  
Grain Yield ◽  
Combining Ability ◽  
Agronomic Traits ◽  
Diallel Analysis ◽  
Quality Protein Maize ◽  
Base Population ◽  
Fusarium Ear Rot ◽  
Ear Rot ◽  
Eastern Canada ◽  
Grain Moisture

Development of early-maturing hybrid cultivars of Quality Protein Maize (QPM), a hard-endosperm high-lysine maize (Zea mays L.), could provide a balanced-protein alternative feed crop for northern temperate areas. A set of inbred lines derived from QPM germplasm was used as the base population for three experiments conducted in eastern Canada: an eight-parent one-half diallel analysis, an evaluation of inbred performance, and an evaluation of resistance to Fusarium ear rot. In the diallel analysis, general combining ability effects were significant for grain yield, moisture at harvest, and kernel opacity. Specific combining ability effects were also significant and accounted for 20 and 13% of the genotypic variability for grain yield and moisture at harvest, respectively. Some QPM hybrids yielded well, but they had relatively high levels of grain moisture at harvest, indicating a need to breed for improved adaptation. Within the base population of QPM inbreds, the variation and repeatability for most agronomic traits and for resistance to Fusarium ear rot appeared to be adequate to allow development of agronomically superior QPM inbreds and hybrids for northern temperate maize growing regions.Key words: Quality Protein Maize, opaque-2, repeatability, diallel, agronomic potential, Fusarium graminearum

scholarly journals Agro-nutritional variations of quality protein maize (Zea mays L.) in Nigeria

2014 ◽  
Vol 59 (2) ◽  
pp. 101-116
Author(s):  
Omolaran Bello ◽  
Odunayo Olawuyi ◽  
Sunday Ige ◽  
Jimoh Mahamood ◽  
Micheal Afolabi ◽  
...  
Keyword(s):  
Grain Yield ◽  
Agronomic Traits ◽  
Central Africa ◽  
Inbred Lines ◽  
Superior Performance ◽  
Quality Protein Maize ◽  
Maize Breeding ◽  
Yield Attributes ◽  
Protein Levels ◽  
Nutritional Qualities

Quality protein maize (QPM) combining the enhanced levels of lysine and tryptophan with high grain yield and desirable agronomic traits could reduce food insecurity and malnutrition in West and Central Africa. Twenty-two varieties of QPM and two local checks were evaluated for agronomic characteristics and nutritional qualities in the southern Guinea savanna of Nigeria for two years (2009 and 2010). Though crude protein levels are good indicators of quality, amino acid composition analyses, especially lysine and tryptophan that would provide a final proof are in progress. The genotypes comprised five open pollinated varieties (OPVs), nine inbred lines, eight hybrids and two local varieties. Differences among the varieties were significant (P<0.01) for grain yield, days to tasselling as well as plant and ear heights, while year x variety interaction was only significant (P<0.05) for days to tasselling. Most of the QPM inbred lines (CML 437, CML 490 CML 178) and hybrids (Dada-ba, ART98-SW5-OB, ART98-SW4- OB and TZPB-OB) have superior performance for grain yield, other yield attributes and nutritional qualities compared with the OPVs and local checks. These inbreds could be potential sources of favorable alleles useful for future maize breeding, while the hybrids could be evaluated in different environments of Nigeria for comparative advantages in different environments and quality of the grains to be released to farmers.

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