Combining Ability and Heterosis Studies for Grain Yield and Its Components in Hybrids of Quality Protein Maize (Zea mays L.)

Arsode, Pandurang; Krishna, K. Murali; Sunil, N.; Sree, V. Gowri; Charan, A. Ravi

doi:10.20546/ijcmas.2017.612.294

Cited by 7 publications

(8 citation statements)

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“…is is in contrast with the findings of Arsode et al [28] who reported significant negative association of days to 50% tasseling with grain yield per plant and plant height, ear length, ear girth, number of kernel-rows per ear, and number of kernels per row.…”

Section: Path Coefficient Analysescontrasting

confidence: 99%

“…is implies that higher ear height leads to increased grain yield; the genotypic correlation between ear height and grain yield (rg � 0.698; p ≤ 0.01) is predominately attributed to the direct effect (rg � 0.651; p ≤ 0.01) of ear height on the grain yield per hectare (Figure 1). Many research findings were in line with this finding [12,28,29]. Similarly, it is also in agreement with the findings of Asrarur-Rehman et al [23] and Bello et al [24].…”

Section: Path Coefficient Analysessupporting

confidence: 91%

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Correlation and Path Coefficient Analysis of Yield and Yield Components of Quality Protein Maize (Zea mays L.) Hybrids at Jimma, Western Ethiopia

Bantte

Alamerew

et al. 2020

International Journal of Agronomy

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Maize is one of the most important staple food crops in many parts of Ethiopia. However, it is not used extensively due to its poor nutritional quality and low productivity. It lacks two essential amino acids, namely, lysine and tryptophan. Knowledge of the interrelationships of grain yield and its various causal (contributory) components is very helpful to improve the efficiency of breeding programs using appropriate selection indices. This article reports the findings of a study conducted to determine the nature of relationships of grain yield and its contributing components and to identify those components with significant effects on yield with the intention of using them as selection criteria using path coefficient analysis (PCA). Therefore, PCA has shown that yield per hectare had a significant and positive phenotypic correlation with plant height, ear height, number of kernels per row, and 100-grain weight. Moreover, PCA had a significant and positive genotypic correlation with days to 50% tasseling, plant height, ear height, and 100-grain weight. The highest direct positive effect on yield per hectare was exhibited by ear height. The findings of this study showed that most genotypes are early maturing and are suitable for areas with short rainy seasons and prone to drought.

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Section: Path Coefficient Analysescontrasting

confidence: 99%

Section: Path Coefficient Analysessupporting

confidence: 91%

Correlation and Path Coefficient Analysis of Yield and Yield Components of Quality Protein Maize (Zea mays L.) Hybrids at Jimma, Western Ethiopia

Bantte

Alamerew

et al. 2020

International Journal of Agronomy

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“…Regarding ear length, only L15 x T1 cross showed positive and significant standard heterosis over Kolba. Shushay (2014) and Arsode et al (2017) for number of ears per plant, Raghu et al (2011) and Asif et al (2014) for ear length found comparable results to the current findings. Though ear diameter revealed significantly positive and negative standard heterosis, none of the crosses had wider ear diameter than the best standard checks (Kolba).…”

Section: Standard Heterosissupporting

confidence: 81%

Standard heterosis and trait association of maize inbred lines using line x tester mating design in Ethiopia

Abebe¹,

Wolde²,

Gebreselassie³

2020

Afr. J. Plant Sci.

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Maize is one of the high priority crops to feed the ever increasing population in Africa, however, its production limited by shortage of high yielding variety coupled with biotic and abiotic stresses. The study was initiated to evaluate the heterotic performances of the F 1 hybrids over the standard checks (Kolba and Jibat). Fifty entries consists 48 F 1 single crosses developed from 24 inbred lines and 2 testers using line x tester design and two commercial check hybrids used in the study. The experiment was conducted using alpha lattice design with two replications at Ambo and Holeta Agricultural Research Center. Analysis of variance revealed existence of significant genetic variation among genotypes for all studied traits except for plant aspect. Location x entry interaction for most of the traits was not significant which suggests hybrid performance was consistent across tested locations. The magnitude of standard heterosis over Kolba and Jibat for grain yield ranged from-40.31 (L13 x T1) to 32.44% (L23 x T1). Cross L23 x T1 exhibited maximum standard heterosis (32.44%) over Kolba and Jibat for grain yield followed by L11 x T1 (22.18%). Positive and significant genotypic, phenotypic correlation coefficient were recorded for yield with plant height (rg=48** and rp=40**), ear height, ear per plant, number of kernels per row, ears length, ear diameter and number of kernel rows per ear. Number of ears per plan (1.08) had the highest positive direct effect on grain yield followed by ear diameter (0.95), number of kernels per row and number of kernel rows per ear indicating the effectiveness of direct selection. Finally, crosses with high standard heterosis for yield and yield components could be used for developing high yielding maize hybrids in the future maize breeding program.

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“…The variation due to SCA effects was also significant for the studied traits, except for the total soluble solids content, indicating that non-additive gene action (domination and epistasis) was involved in the trait's inheritance (Table 6). In the development of improved cultivar, the estimation of SCA effects serves helpful information on both parental forms (maternal and paternal) used in the individual cross combination (Arsode et al 2017). Unfortunately, in the present populations, most of the hybrids had non-significant SCA effects or significant, but in the undesired direction.…”

Section: Resultsmentioning

confidence: 86%

Combining Ability Analysis of Ear Characteristics of Sweet Corn Hybrids Suitable for Organic Crop Production

Chozin

Sudjatmiko

2019

Journal of Horticultural Research

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Good knowledge of genetic merits governing the inheritance of economic traits is of paramount importance to plant breeders for crop improvement. Objectives of the study were to investigate the genetic nature of ear traits in sweet corn (Zea mays convar. saccharata var. rugosa) based on the general and specific combining ability (GCA and SCA) analysis, and to determine the breeding potential of eight promising inbred lines for the development of new hybrid cultivars well suited for organic production. Thirty-six genotypes (hybrid families) derived from a half diallel cross design were grown under organic crop management at three agro-ecological zones of the tropics. Although the genotypes varied significantly for all the observed ear traits, some of them showed clear inconsistencies in performing husked ear size (length, diameter, and weight), kernel row number, and kernel number per row across environments. The combining ability analysis showed that additive gene action was more preponderance than non-additive gene actions in governing the inheritance of the studied ear traits. The inbred lines: Caps 5, Caps 17A, Caps 17B, and Caps 22 showed their potential as good partners for the improvement of ear performances as to the development of superior sweet corn cultivars for organic production.

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Combining Ability and Heterosis Studies for Grain Yield and Its Components in Hybrids of Quality Protein Maize (Zea mays L.)

Cited by 7 publications

References 1 publication

Correlation and Path Coefficient Analysis of Yield and Yield Components of Quality Protein Maize (Zea mays L.) Hybrids at Jimma, Western Ethiopia

Correlation and Path Coefficient Analysis of Yield and Yield Components of Quality Protein Maize (Zea mays L.) Hybrids at Jimma, Western Ethiopia

Standard heterosis and trait association of maize inbred lines using line x tester mating design in Ethiopia

Combining Ability Analysis of Ear Characteristics of Sweet Corn Hybrids Suitable for Organic Crop Production

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