Genetic analysis of grain yield and other traits of extra-early yellow maize inbreds and hybrid performance under contrasting environments

Badu‐Apraku, B.; Oyekunle, M.

doi:10.1016/j.fcr.2012.01.018

Cited by 66 publications

(67 citation statements)

References 26 publications

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“…This result corroborates the findings of Rosielle and Hamblin (), Badu‐Apraku et al. () and Badu‐Apraku and Oyekunle (). The grain yield reduction of 4–84 % observed among inbreds and 39–91 % among hybrids revealed that the levels of drought stress imposed during the flowering and grain‐filling stages were severe enough to elucidate the differences among the inbreds and hybrids.…”

Section: Discussionsupporting

confidence: 92%

“…() showed that the general combining ability (GCA) sums of squares for grain yield and other traits of nine early‐maturing inbreds were larger than those of specific combining ability (SCA) under drought, well‐watered, Striga ‐infested and Striga ‐free conditions, indicating that additive gene action was more important than the non‐additive component in the inheritance of drought tolerance. Similar results were reported for twenty‐one diallel crosses derived from seven extra‐early yellow inbreds evaluated under contrasting environments (Badu‐Apraku and Oyekunle ). These results are consistent with the findings of several other workers (Betrán et al.…”

Section: Introductionsupporting

confidence: 84%

“…Other reports further confirm that although drought may occur at any stage of maize growth, if it coincides with flowering and grain‐filling periods, yield losses can be between 40 % and 90 % (NeSmith and Ritchie , Menkir and Akintunde , Badu‐Apraku et al. , Badu‐Apraku and Oyekunle ). Campos et al.…”

Section: Introductionmentioning

confidence: 78%

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Genetic Analysis of Grain Yield and Other Traits of Early‐Maturing Maize Inbreds under Drought and Well‐Watered Conditions

Oyekunle

Badu‐Apraku²

2013

J Agronomy Crop Science

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Maize (Zea mays L.) is an important staple food crop in West and Central Africa (WCA). However, its production is constrained by drought. Knowledge and understanding of the genetics of hybrid performance under drought is invaluable in designing breeding strategies for improving maize yield. One hundred and fifty hybrids obtained by crossing 30 inbreds in sets using the North Carolina Design II plus six checks were evaluated under drought and well‐watered conditions for 2 years at three locations in Nigeria. The objectives of the studies were to (i) determine the mode of gene action controlling grain yield and other important agronomic traits of selected early inbred lines, (ii) examine the relationship between per se performance of inbreds and their hybrids and (iii) identify appropriate testers for maize breeding programmes in WCA. General combining ability (GCA) and specific combining ability (SCA) mean squares were significant (P < 0.01) for grain yield and other traits under the research environments. The GCA accounted for 64.5 % and 62.3 % of the total variation for grain yield under drought and well‐watered conditions, indicating that additive gene action largely controlled the inheritance of grain yield of the hybrids. Narrow‐sense heritability was 67 % for grain yield under drought and 49 % under well‐watered conditions. The correlations between traits of early‐maturing parental lines and their hybrids were significant (P < 0.01) under drought, well‐watered and across environments. Mid‐parent and better‐parent heterosis for grain yield were 45.3 % and 18.4 % under drought stress and 111.9 % and 102.6 % under well‐watered conditions. Inbreds TZEI 31, TZEI 17, TZEI 129 and TZEI 157 were identified as the best testers. Drought‐tolerant hybrids with superior performance under stress and non‐stress conditions could be obtained through the accumulation of favourable alleles for drought tolerance in both parental lines.

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Section: Discussionsupporting

confidence: 92%

Section: Introductionsupporting

confidence: 84%

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Genetic Analysis of Grain Yield and Other Traits of Early‐Maturing Maize Inbreds under Drought and Well‐Watered Conditions

Oyekunle

Badu‐Apraku²

2013

J Agronomy Crop Science

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“…The risk of drought stress is severe particularly in the Sudan savanna zone due to unreliable and uneven distribution of rainfall (Eckebil, 1991 lowlands with adequate precipitation for maize production, periodic drought may occur at the most sensitive stages of the crop such as flowering and grain filling. While drought will impact the growth and ultimate performance of a crop at any stage, it is of most detriment at flowering and grain-filling resulting in yield penalties of between 40 and 90% (Menkir and Akintunde, 2001;Badu-Apraku et al, 2011a;Badu-Apraku and Oyekunle, 2012). Therefore, improved tolerance to drought is an important breeding objective to stabilize maize production in the sub region.…”

mentioning

confidence: 97%

Genetic diversity of tropical early-maturing maize inbreds and their performance in hybrid combinations under drought and optimum growing conditions

Oyekunle

Badu‐Apraku²,

Hearne³

et al. 2015

Field Crops Research

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a b s t r a c tHybrid development is enhanced by the assessment and understanding of genetic diversity and distance within inbreds. One hundred and fifty hybrids derived from 30 early-maturing inbreds plus six checks were evaluated at three locations in Nigeria for 2 years to assess their performance under drought and well-watered conditions. In addition, twenty three microsatellite markers were employed to assess genetic diversity of selected 42 inbreds. Significant differences were observed among inbreds and hybrids for most traits under both research conditions. A total of 130 alleles were detected ranging from two for nc133 to nine for phi299852 with an average of 5.7 alleles per locus. Polymorphic information content ranged from 0.17 for phi308707 to 0.77 for phi084 with an average of 0.54. Thirty-one unique alleles were detected in 21 inbreds. Microsatellite markers classified the inbred lines into five groups. Genetic distance estimates among pairs of inbreds ranged from 0.42 (TZEI 26 vs TZEI 108) to 0.85 (TZEI 24 vs TZEI 4) with an average of 0.67. Correlation between microsatellite-based GD estimates of the parental lines and their F 1 hybrids were not significant for grain yield and other traits under drought and well-watered conditions. However, significant correlations existed between F 1 hybrid grain yield and heterosis under drought and well-watered conditions. TZEI 31 × TZEI 18 was identified as the highest-yielding and stable hybrid across environments and should be promoted for adoption by farmers in West and Central Africa.

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“…Parental inbred lines TZEI-157, TZEI-7, TZEI-22 and TZEI-31 contributed 0.12, 0.10, 0.06 and 0.01 t/ha to the grain yields observed in the hybrids across infestations. One or both of the parents involved in the following crosses TZEI-7*TZEI-157, TZEI-31*TZEI-157, TZEI-22*TZEI-157, TZEI 4*TZEI-157 and TZEI-4*TZEI-22 had positive GCA effect, suggesting that favourable genes were transmitted to the progenies (Badu-Apraku and Oyekunle, 2012). This implies that these hybrids can be used as testers in subsequent maize breeding programmes.…”

Section: Analysis Of Variance For Msvd Severity Mean Score and Grain mentioning

confidence: 86%

Combining ability of tropical early maize (Zea mays L.) inbred lines for grain yield and resistance to maize streak virus disease

Ige¹,

Akromah²,

Oppong³

et al. 2017

J. Plant Breed. Crop Sci.

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Maize is an important cereal crop in sub-Saharan Africa but production is adversely affected by maize streak virus disease (MSVD). In Ghana, re-occurrence of the disease has been reported in several regions, therefore, necessitating the development of resistant hybrids as the most sustainable and economical option. The objectives of the study were to identify parents and hybrids that combine MSVD resistance with high yield and determine the influence of maternal effect on the inheritance of MSVD resistance. To achieve these, five parental inbred lines namely: TZEI-4, TZEI-7, TZEI-22, TZEI-31 and TZEI-157 were crossed in a full diallel mating design during the major season of 2015. The resulting F1 hybrids were evaluated under natural and artificial infestations during the minor and major seasons of 2015/2016 using 9 x 3 alpha-lattice design with three replications. General combining ability (GCA) and specific combining ability (SCA) mean squares were significant for MSVD severity mean score and only SCA for grain yield. Additive gene effect was preponderant for MSVD severity mean score, whereas grain yield was influenced by non-additive gene effect. Maternal effect had no significant contribution to the inheritance of MSVD resistance. GCA by environment and SCA by environment mean squares were significant for MSVD severity mean score. GCA effects revealed that inbreds TZEI-7 and TZEI-22 were resistant to MSVD. They could be good combiners for grain yield in addition to TZEI-31 and TZEI-157. Hybrids TZEI-4*TZEI-22 and TZEI-4*TZEI-31 showed resistance to MSVD as revealed by their SCA effects and heterotic values. TZEI-7*TZEI-157, TZEI-31*TZEI-157, TZEI-22*TZEI-157 and TZEI-4*TZEI-22 had positive and significant SCA effect, mid-parent heterosis and high parent heterosis for grain yield. Promising hybrids TZEI-4*TZEI-22, TZEI-22*TZEI-157, TZEI-7*TZEI-157 and TZEI-31*TZEI-157 identified in this study should be further tested in multi-locations across Ghana to determine their stability and adaptability.

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Genetic analysis of grain yield and other traits of extra-early yellow maize inbreds and hybrid performance under contrasting environments

Cited by 66 publications

References 26 publications

Genetic Analysis of Grain Yield and Other Traits of Early‐Maturing Maize Inbreds under Drought and Well‐Watered Conditions

Genetic Analysis of Grain Yield and Other Traits of Early‐Maturing Maize Inbreds under Drought and Well‐Watered Conditions

Genetic diversity of tropical early-maturing maize inbreds and their performance in hybrid combinations under drought and optimum growing conditions

Combining ability of tropical early maize (Zea mays L.) inbred lines for grain yield and resistance to maize streak virus disease

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