Combining ability and heterosis study in maize (Zea mays L.) Hybrids at different environments in Bangladesh

Karim, A. J. M. S.; Ahmed, S; Akhi, A. H.; Talukder, M. I.; Mujahidi, TA

doi:10.3329/bjar.v43i1.36186

Cited by 18 publications

(24 citation statements)

References 8 publications

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“…Hybrids play crucial role in maize production increment (Aslam, Sohail, Maqbool, Ahmad, & Shahzad, 2017;Karim, Ahmed, Akhi, Talukder, & Mujahidi, 2018) and food security. Hybrid maize varieties development needs selection of appropriate parents (inbred lines) which is the covert of success in hybrid maize development.…”

Section: Introductionmentioning

confidence: 99%

Combining ability performance and heterotic grouping of maize (Zea mays) inbred lines in testcross formation in Western Amhara, North West Ethiopia

Elmyhun

Liyew

Shita

et al. 2020

Cogent Food & Agriculture

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Development and selections of appropriate parents' are perquisites for hybrid variety development and need knowledge of heterotic grouping and combining ability. The research was investigated to identify good general combiner inbred lines and good specific combiner three-way crosses using randomized complete block design with three replications. Sixteen crosses (eight inbred lines crossed with two testers) and three standard checks were evaluated for yield and yield components. Analysis of variance disclosed significant differences among genotypes for most traits indicating existence of variability among genotypes. General combining ability (GCA) for grain yield demonstrated five inbred lines and T2 was good general combiner for grain yield. Specific combining ability (SCA) analysis revealed eight hybrids were good specific combiner for grain yield. Three hybrids ABOUT THE AUTHORS Melkamu Elmyhun is a breeder at Adet Agricultural Research Center, Amhara regional Agricultural Research Institute in Ethiopia. Melkamu has handled different research projects in field crops focusing on maize and contributed a lot for improvement of maize productivity in the region and in the country. He has participated actively in national research centers, NGOs and international research centers and has good collaboration. He has dedicated in resource management and doing research alone or in teamwork. Melkamu is highly devoted in creating genotypic variability which is the base for the development of betteryielding varieties.Chale Liyew and Abayneh Shita are researchers at Adet Agricultural Research Center, Amhara regional Agricultural Research Institute in Ethiopia. They have great skills in resource, data and trial management with great interest and participation in maize crossing.Mekuanint Andualem is a plant protection researcher at Adet Agricultural Research Center, Amhara regional Agricultural Research Institute in Ethiopia. Mekuanint has been involved in maize-breeding in early generation evaluation for disease resistance or tolerance.

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Section: Introductionmentioning

confidence: 99%

Combining ability performance and heterotic grouping of maize (Zea mays) inbred lines in testcross formation in Western Amhara, North West Ethiopia

Elmyhun

Liyew

Shita

et al. 2020

Cogent Food & Agriculture

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“…The percent heterosis for grain yield varied from -85.76 to 10.83% (Table 05). Moreover, Karim et al, (2018), Talukder et al, (2016) and Begum et al, (2018) found 5.25%, 12.53 % and 9.9% significant positive heterosis in their studied materials, respectively. Among the 28 F1, three crosses revealed positive heterosis for grain yield.…”

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confidence: 80%

Diallel analysis and estimation of heterosis in single cross maize hybrids

Karim¹,

Ahmed²,

Akhi³

et al. 2018

J biosci agric res

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Heterosis and the nature of combining ability were studied in 28 F1 hybrids made by selected 8 inbred lines using 8×8 diallel mating system (Griffing's Model I, Method IV) excluding reciprocals in maize for grain yield and yield contributing characters. The significant estimates of GCA and SCA variances suggested the importance of both additive and non-additive gene actions for the expression of the traits studied. The variances for general combining ability (GCA) were found significant for days to pollen shedding, days to silking, plant height, ear height, 1000-grain weight, and yield. Specific combining ability (SCA) was significant for all the characters except yield. Nonsignificant specific combining ability (SCA) variance for yield suggests that this trait predominantly controlled by the additive type of gene action. Variances due to GCA were much higher in magnitude than SCA for all the characters indicating the superiority of additive gene effects for the inheritance of this trait. Parents P4 and P6 were the best general combiner for high yield, P5 for grain weight and parents P7 and P8 for earliness and dwarf plant type. Seven crosses P1×P5, P1×P7, P2×P4, P3×P5, P4×P5, P4×P8, and P6×P7 exhibited positive SCA effects for grain yield. Considering BHM9 as a check, the percent heterosis for grain yield varied from-85.76 to 10.83%. Three crosses exhibited significant and positive heterosis viz. P2×P4 (10.83%), P6×P7 (9.72%) and P4×P6 (1.78%) over the check BHM9. Considering the performance of SCA effects and heterosis, two crosses P2×P4 and P6×P7 could be utilized for developing high yielding hybrid varieties as well as for exploiting hybrid potency.

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“…There are several studies regarding diallel designs in maize breeding [ 14 , 48 – 50 ], but only a few of them performed spatial analyses, mainly diallel MET analyses [ 51 ]. In addition, the use of spatial analyses has been increasing in recent years [ 43 , 45 , 52 – 57 ].…”

Section: Introductionmentioning

confidence: 99%

Accounting for spatial trends in multi-environment diallel analysis in maize breeding

et al. 2021

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Spatial trends represent an obstacle to genetic evaluation in maize breeding. Spatial analyses can correct spatial trends, which allow for an increase in selective accuracy. The objective of this study was to compare the spatial (SPA) and non-spatial (NSPA) models in diallel multi-environment trial analyses in maize breeding. The trials consisted of 78 inter-populational maize hybrids, tested in four environments (E1, E2, E3, and E4), with three replications, under a randomized complete block design. The SPA models accounted for autocorrelation among rows and columns by the inclusion of first-order autoregressive matrices (AR1 ⊗ AR1). Then, the rows and columns factors were included in the fixed and random parts of the model. Based on the Bayesian information criteria, the SPA models were used to analyze trials E3 and E4, while the NSPA model was used for analyzing trials E1 and E2. In the joint analysis, the compound symmetry structure for the genotypic effects presented the best fit. The likelihood ratio test showed that some effects changed regarding significance when the SPA and NSPA models were used. In addition, the heritability, selective accuracy, and selection gain were higher when the SPA models were used. This indicates the power of the SPA model in dealing with spatial trends. The SPA model exhibits higher reliability values and is recommended to be incorporated in the standard procedure of genetic evaluation in maize breeding. The analyses bring the parents 2, 10 and 12, as potential parents in this microregion.

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Combining ability and heterosis study in maize (Zea mays L.) Hybrids at different environments in Bangladesh

Cited by 18 publications

References 8 publications

Combining ability performance and heterotic grouping of maize (Zea mays) inbred lines in testcross formation in Western Amhara, North West Ethiopia

Combining ability performance and heterotic grouping of maize (Zea mays) inbred lines in testcross formation in Western Amhara, North West Ethiopia

Diallel analysis and estimation of heterosis in single cross maize hybrids

Accounting for spatial trends in multi-environment diallel analysis in maize breeding

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