Genetic analysis of drought tolerance in adapted × exotic crosses of maize inbred lines under managed stress conditions

Adebayo, Moses; Menkir, Abebe; Blay, Essie; Gracen, Vernon; Danquah, Eric Yirenkyi; Hearne, Sarah

doi:10.1007/s10681-013-1029-5

Cited by 48 publications

(74 citation statements)

References 33 publications

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“…The 24 lines were divided into six groups, each of four lines, and inter-crossed in six sets to generate 96 single-cross hybrids using a North Carolina Design II scheme. The method has been presented in detail by Adebayo et al (2014). The 96 hybrids were evaluated in subsequent field trials.…”

Section: Germplasmmentioning

confidence: 99%

Combining Ability of Adapted and Exotic Drought-tolerant Maize Inbred Lines Under Full Irrigation and Rainfed Conditions in Nigeria

Adebayo

Menkir

2015

Journal of Crop Improvement

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Adoption of improved maize ( Zea mays L.) varieties in the rainforest agro-ecology of Nigeria largely depends on yielding potential and resistance to common foliar diseases. The present study aims at assessing the combining ability of a set of adapted and exotic drought-tolerant maize inbred lines under irrigated and rainfed conditions in Nigeria. Ninety-six hybrids generated using a North Carolina Design II scheme, and four checks were evaluated in a 10 × 10 triple lattice with three replications under full irrigation in the dry seasons of 2010 and 2011 and under natural disease inoculation in the rainy seasons of 2011 and 2012. Hybrids differed significantly for all measured traits. Both general combining ability (GCA) and specific combining ability (SCA) were mostly highly significant (P < 0.01) for all agronomic traits and leaf blight. Additive genetic effects were more important than non-additive genetic effects in controlling grain yield and leaf blight (GCA > 70%). EXL03, EXL06, EXL16, ADL33, and ADL47 had positive and significant female and male GCA effects for grain yield, and significant but negative GCA effects for leaf blight.

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Section: Germplasmmentioning

confidence: 99%

Combining Ability of Adapted and Exotic Drought-tolerant Maize Inbred Lines Under Full Irrigation and Rainfed Conditions in Nigeria

Adebayo

Menkir

2015

Journal of Crop Improvement

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“…This is also important for introgressing favorable alleles from accessions with possible utility for specific breeding purposes. A few studies of combining ability involving the late/intermediate maturing inbreds of IITA and CIMMYT have been conducted under nonstress conditions (Dhliwayo et al, 2009), and drought and well-watered conditions (Adebayo et al, 2013). Based on the results of these studies, some CIMMYT lines were proposed for improving IITA's intermediate germplasm.…”

mentioning

confidence: 99%

“…Very few studies in this subject-matter area have been conducted in Africa. In one such study conducted in Nigeria, lines developed at IITA, Ibadan and Obafemi Awolowo University (OAU), Ile-Ife were used in a line × tester crosses along with reciprocals (Aghughu, 1989). The study showed that IITA lines were better as female parents in hybrid combinations.…”

mentioning

confidence: 99%

Heterotic Patterns of IITA and CIMMYT Early‐Maturing Yellow Maize Inbreds under Contrasting Environments

et al. 2016

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Drought and low soil nitrogen (low-N) constitute major constraints to maize (Zea mays L.) production in West Africa (WA). Th e International Institute of Tropical Agriculture (IITA) and International Center for Maize and Wheat Improvement (CIMMYT) have developed drought and low-N tolerant inbreds for Africa. Combinations between selected IITA and CIMMYT inbreds could produce outstanding hybrids. Diallel crosses of 12 IITA and fi ve CIMMYT early yellow inbreds plus four checks were evaluated under drought, low-N and optimal conditions at four locations in Nigeria for 2 yr. Th e objectives were to examine the combining ability of the inbreds for grain yield and other traits, classify the lines into heterotic groups, identify best testers under the contrasting environments, assess genotype × environment interactions and evaluate the yield performance and stability of single-cross hybrids. Grouping of the inbred lines was done with heterotic group's specifi c combining ability (SCA) and general combining ability (GCA) (HSGCA), single nucleotide polymorphism based genetic distance (SNP-GD) and GCA eff ects of multiple traits (HGCAMT) methods. Th e GCA mean squares for all traits were greater than SCA mean squares in all environments. Th e inbreds were classifi ed into four heterotic groups each across environments by HSGCA and SNP-GD while HGCAMT method placed them into three groups. HGCAMT was the most effi cient followed by HSGCA and then SNP-GD method. Th e HGCAMT identifi ed inbreds ENT 17, ENT 15, and ENT 8 as best testers for heterotic Groups 1, 2, and 3. Hybrids TZEI 17 × ENT 15, and TZEI 149 × ENT 15 were outstanding across environments.

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“…Sourcing of novel alleles in introduced or exotic germplasm has been identified as an effective breeding strategy for diversifying the genetic base of adapted materials and for raising the odds of developing superior hybrids (Dhliwayo et al, 2009;White et al, 2011;Adebayo et al, 2013). Recurrent selection procedure has been used extensively in concentrating genes of resistance into the maize genepool.…”

Section: Introductionmentioning

confidence: 99%

“…Following combining ability studies involving inbreds from IITA and CIMMYT, some CIMMYT lines were identified to have potentials for improving IITA's early maturing and intermediate maturing germplasms for drought and low nitrogen tolerance (Adebayo et al, 2013;Ifie et al, 2015;Badu Apraku et al, 2016). However, limited studies have been conducted to examine the potentials of adapted and exotic non-borer maize inbred lines for their direct use in hybrid combinations aimed at stem borer resistance efforts.…”

Section: Introductionmentioning

confidence: 99%

Potential in a collection of adapted and exotic tropical maize inbred lines as resistance source for stem borers

Oloyede-Kamiyo¹,

Ajala²,

Job³

2018

J. Plant Breed. Crop Sci.

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Lepidopteran borers are the most devastating field pests of maize in West and Central Africa. In view of the rapidly changing climate which favours an upsurge of more destructive biotypes of insect pests, diverse sources of resistance from different genetic backgrounds need to be harnessed for crop improvement purposes. Forty tropical maize inbreds comprising adapted and exotic lines from International Institute of Tropical Agriculture (IITA) and International Maize and Wheat Improvement Centre (CIMMYT) maize breeding programs were evaluated for resistance to two species of stem borers-Sesamia calamistis and Eldana saccharina at Ibadan and Ikenne, Nigeria, under artificial infested and non-infested conditions in 2015 and 2016 cropping seasons. The experiment was laid out in a randomized complete block design in three replicates. Data were collected on agronomic traits and stem borer damage parameters. On average, the CML lines had relatively higher grain yield despite the high level of stem tunneling, stalk breakage and cob damage, with the exception of CML 67 (0.19 ton/ha) and CML 71 (0.06 tons/ha). BD 74-395 had the highest yield (1.45 t/ha) among the BDs, despite its high stalk breakage and cob damage. Among IITA lines, KU1414SR/SR, 1368 and 9030STR were the highest yielding with grain yields of 1.71, 1.39 and 1.19 t/ha, respectively. Moderate to high heritability was observed among the stem borer damage parameters. Negative genetic gain was observed in stem tunneling. Mean square of lines was significant for all the traits studied. The top-performing inbreds were similarly grouped using the rank summation index and principal component analysis. The exotic lines had good adaptability and showed potential as sources of stem borer resistance, and could therefore be explored in breeding programs for resistance to Eldana and Sesamia.

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Genetic analysis of drought tolerance in adapted × exotic crosses of maize inbred lines under managed stress conditions

Cited by 48 publications

References 33 publications

Combining Ability of Adapted and Exotic Drought-tolerant Maize Inbred Lines Under Full Irrigation and Rainfed Conditions in Nigeria

Combining Ability of Adapted and Exotic Drought-tolerant Maize Inbred Lines Under Full Irrigation and Rainfed Conditions in Nigeria

Heterotic Patterns of IITA and CIMMYT Early‐Maturing Yellow Maize Inbreds under Contrasting Environments

Potential in a collection of adapted and exotic tropical maize inbred lines as resistance source for stem borers

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