scholarly journals Combining ability and heterotic grouping of turcicum‐resistant early‐maturing maize inbreds

2021 ◽  
Author(s):  
Baffour Badu‐Apraku ◽  
Faith A. Bankole ◽  
Morakinyo A. B. Fakorede ◽  
Gregory Ogbe ◽  
Ranajit Bandyopadhyay ◽  
...  
Keyword(s):  
Combining Ability ◽  
Early Maturing ◽  
Heterotic Grouping ◽  
Maize Inbreds

scholarly journals Grouping of early maturing quality protein maize inbreds based on SNP markers and combining ability under multiple environments

2015 ◽  
Vol 183 ◽  
pp. 169-183 ◽  
Author(s):  
B. Badu-Apraku ◽  
B. Annor ◽  
M. Oyekunle ◽  
R.O. Akinwale ◽  
M.A.B. Fakorede ◽  
...  
Keyword(s):  
Combining Ability ◽  
Snp Markers ◽  
Quality Protein Maize ◽  
Early Maturing ◽  
Maize Inbreds ◽  
Multiple Environments

scholarly journals Combining Ability of Early-Maturing Yellow Maize Inbreds under Combined Drought and Heat Stress and Well-Watered Environments

Agronomy ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1585
Author(s):  
Laouali M. Nasser ◽  
Baffour Badu-Apraku ◽  
Vernon E. Gracen ◽  
Hortense N. A. Mafouasson
Keyword(s):  
Heat Stress ◽  
Grain Yield ◽  
Combining Ability ◽  
Selection Index ◽  
Climatic Conditions ◽  
Sub Saharan Africa ◽  
Yield Potential ◽  
Early Maturing ◽  
Maize Inbreds ◽  
Drought And Heat Stress

Grain-yield potential of maize (Zea mays L.) is limited by the harsh climatic conditions during dry seasons in the savanna of sub-Saharan Africa (SSA). One hundred and five hybrids derived from diallel crosses involving 15 early-maturing yellow maize inbreds were screened under combined drought and heat stress (CDHS) and well-watered (WW) conditions at four locations representative of the dry savannas of Niger, 2012–2014. The objective of the study was to examine the general combining ability (GCA) effects of the inbred lines and specific combining ability (SCA) of the crosses under CDHS and WW environments, assess yield and stability of the derived hybrids under contrasting environments and investigate inter-relationships among traits of the hybrids under contrasting environments. GCA and SCA effects for grain yield and other measured traits were significant, with preponderance of GCA effects over SCA effects under both the CDHS and WW environments. Inbred ENT 13 possessed positive and significant GCA effects for grain yield under both CDHS and WW environments indicating that the inbred could be used for developing outstanding hybrids with good levels of tolerance to CDHS. This also implied that the inbred line could serve as invaluable genetic resource for introgression of favorable alleles into tropical early-maturing maize populations for accelerated genetic gains from selection for improved grain yield. Hybrids ENT 13 × TZEI 167 and TZEI 157 × ENT 13 were the most stable and among the highest yielding hybrids across research environments. These outstanding hybrids could be tested extensively for commercialization in SSA to improve food security. Plant and ear aspects and days to 50% silking could be combined with grain yield in a selection index for improvement of yield under CDHS without yield penalties under WW environments.

Combining Ability of Early-maturing White Maize Inbreds under Stress and Nonstress Environments

2011 ◽  
Vol 103 (2) ◽  
pp. 544-557 ◽  
Author(s):  
B. Badu-Apraku ◽  
M. Oyekunle ◽  
R.O. Akinwale ◽  
A. Fontem Lum
Keyword(s):  
Combining Ability ◽  
Early Maturing ◽  
Maize Inbreds

Combining Ability of Maize Inbreds for Carotenoids and Tocopherols

Crop Science ◽  
2003 ◽  
Vol 43 (3) ◽  
pp. 818 ◽  
Author(s):  
C. O. Egesel ◽  
J. C. Wong ◽  
R. J. Lambert ◽  
T. R. Rocheford
Keyword(s):  
Combining Ability ◽  
Maize Inbreds

scholarly journals Combining ability of extra‐early biofortified maize inbreds under Striga infestation and low soil nitrogen

Crop Science ◽  
2020 ◽  
Vol 60 (4) ◽  
pp. 1925-1945
Author(s):  
Solomon A. Oyekale ◽  
B. Badu‐Apraku ◽  
Victor O. Adetimirin
Keyword(s):  
Soil Nitrogen ◽  
Combining Ability ◽  
Maize Inbreds

scholarly journals Testcross performance and combining ability of early maturing maize inbreds under multiple-stress environments

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Benjamin Annor ◽  
Baffour Badu-Apraku ◽  
Daniel Nyadanu ◽  
Richard Akromah ◽  
Morakinyo A. B. Fakorede
Keyword(s):  
Grain Yield ◽  
Combining Ability ◽  
Central Africa ◽  
Optimal Conditions ◽  
Gene Effects ◽  
Maize Production ◽  
Multiple Stress ◽  
Early Maturing ◽  
Additive Gene ◽  
West And Central Africa

Abstract Availability of multiple-stress tolerant maize is critical for improvement in maize production in West and Central Africa (WCA). A study was carried out to (i) assess a set of inbred lines for combining ability under stressed and optimal conditions, (ii) determine the performance of the testcrosses under different conditions, and (iii) identify outstanding hybrids across the conditions. Two hundred and five testcrosses were planted with five hybrid checks under Striga-infested, low soil nitrogen, drought and optimal conditions between 2015 and 2016 in Nigeria. The grain yield inheritance under optimal condition was largely regulated by additive gene effect whereas non-additive gene effects largely regulated grain yield under the three stresses. Four of the inbreds had significant positive general combining ability effects each under low N and drought, and three under Striga infestation for grain yield. The inbreds could be vital sources of beneficial alleles for development and improvement of tropical yellow maize hybrids and populations. Hybrids TZEI 443 x ENT 13 and TZEI 462 x TZEI 10 were high yielding and stable; they out-performed the three early maturing released hybrids in WCA. The new hybrids should be extensively assessed and released in the sub-region to improve food security.

Genetic Analysis of Grain Yield of IITA and CIMMYT Early-Maturing Maize Inbreds under Striga -Infested and Low-Soil-Nitrogen Environments

Crop Science ◽  
2015 ◽  
Vol 55 (2) ◽  
pp. 610-623 ◽  
Author(s):  
Beatrice E Ifie ◽  
Baffour Badu-Apraku ◽  
Vernon Gracen ◽  
Eric Y Danquah
Keyword(s):  
Genetic Analysis ◽  
Grain Yield ◽  
Soil Nitrogen ◽  
Early Maturing ◽  
Maize Inbreds
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