Combining ability and nature of gene action in maize (Zea mays L) inbred lines for resistance to gray leaf spot disease (Cercospora zeae maydis) in Ethiopia

Bekeko, Zelalem; Fininsa, Chemeda; Wegary, Dagne; Hussien, Temam; Shimelis, Hussein; Asalf, Belachew

doi:10.1016/j.cropro.2018.05.010

Cited by 11 publications

(21 citation statements)

References 34 publications

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“…The predominance of additive effects on root distribution in common bean was also reported (Melo et al, 2016). On the other hand, several authors emphasize the significance, and in some situations even the predominance of non-additive gene type in the genetic control of one or more traits, such as root distribution, resistance to Fusarium, resistance to gray leaf spot, days to flowering, seed yield, pods per plant, and grain yield (Toaldo et al, 2013;Batista et al, 2017;Bekeko et al, 2018;Oghan et al, 2018;Rocha;Pereira;Vello, 2018).…”

Section: Resultsmentioning

confidence: 90%

“…The significance of the genotype mean square was estimated by the F test (p < 0.05) for root distribution (Table 2) and indicates the existence of variability among the 35 evaluated genotypes, the presence of genetic diversity between parents and their combinations, and confirms the use of contrasting genotypes in diallel mating systems (Bekeko et al, 2018). The parents used in making the diallel analysis are contrasted with each other for the market group, growth habit, and gene group.…”

Section: Resultsmentioning

confidence: 90%

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Combining ability between common bean gene groups for root distribution trait

et al. 2020

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When different gene groups are combined by hybridization, the expression of predominant genes for a trait must be known. This understanding is fundamental to the decisions made by breeders in the stages of cultivation and selection of segregating populations during the breeding program. Thus, the objective of this study was to determine the effects of combining ability and gene action for the root distribution traits of the Andean and Mesoamerican common bean gene groups. Six common bean parents from the Andean and Mesoamerican groups were hybridized in a complete diallel mating scheme, resulting in 30 F1 hybrids. The parents and hybrids were planted in the field in a simple lattice design. The target trait was root distribution, calculated as the relative number of roots in the topsoil. The effect of the general combining ability was significantly higher than that of the specific combining ability (58%) and the reciprocal effect (41%). Particularly, the combination estimates were modified according to the order of the gene groups used. The combinations IPR Uirapuru x BAF53 (Mesoamerican x Andean), BAF53 x CBS14 (Andean x Andean), and CBS14 x IPR Uirapuru (Andean x Mesoamerican) mainly exhibited an increase in the mean root distribution. However, the highest fraction of genetic variance correlated with additive components (60%), even in crosses involving different gene groups. Consequently, the additive gene action was predominant in the expression of root distribution trait in common bean, irrespective of the gene group used.

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Section: Resultsmentioning

confidence: 90%

Section: Resultsmentioning

confidence: 90%

Combining ability between common bean gene groups for root distribution trait

et al. 2020

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“…The considerably high GCA effects suggested that preliminary selection for the relative potential of the parents used in hybrid breeding could be accomplished effectively by crossing to a few tester lines and comparing the performance of the hybrids in multi-environments, while improvement of morphological and quality traits may be possible by utilizing biparental mating, followed by recurrent selection in case of significant effect due to SCA (Alika & Ojomo, 1996). Even though several reports have emphasized the importance of additive variance in grain yield variation (Badu-Apraku et al, 2016;Bekeko et al, 2018) in some studies grain yield was found to be controlled by nonadditive (Bello & Olawuyi, 2015;Estakhr & Heidari, 2012;Seymour et al, 2016) or both additive and non-additive gene action (Shiri, Aliyev, & Choukan, 2010). Ali et al (2018) reported over-dominance type of gene action played an important role in the inheritance of earliness and yield traits in maize at different locations.…”

Section: Variation In Morphological and Quality Traitsmentioning

confidence: 99%

“…Selection could be effective to improve the traits like grain yield controlled by additive gene effects. Some researchers reported the preponderance role of additive genetic effects on grain yield (Badu-Apraku et al, 2016;Bekeko et al, 2018) while others stated the significant role of non-additive genetic effects (Bello & Olawuyi, 2015;Estakhr & Heidari, 2012;Seymour et al, 2016) or importance of both additive and non-additive genetic effects (Hefny, 2010;Njeri et al, 2017;Shiri, Aliyev, & Choukan, 2010). Also, if these crops were exploited properly through heterosis breeding, the quality traits give the high economic importance of this crop.…”

Section: Introductionmentioning

confidence: 99%

Heterosis, Combining Ability and Their Inter-Relationship for Morphological and Quality Traits in Yellow Maize (Zea mays L.) Single-Crosses Across Environments

Bhusal

Lal²

2020

Agrivita.J.Agr.Sci

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The research aimed to study heterosis, combining ability and performance along with their interrelationship across three environments. Variance due to general (GCA) and specific combining abilities (SCA) and their interaction with environment was found to be significant for most of studied traits. For all the studied traits but ASI (Anthesis-silking interval), HI (Harvest index) and starch content, additive gene action was highly important than non-additive gene action for their expression as reflected by Baker's ratio which was near to unity. CML439, R13-1-1 and Tarun83-1-3-2 were the best general combiner for starch, protein and oil, respectively. R13-1-17, CML439 and Tarun83-1-3-2 were good general combiner for maturity characters and harvest index while TSK 196 and TSK 197 were good general combiner for cob length, cob girth, number of grains/row and grain yield. DMR9047×R13-1-17 and POP31Q×Tarun83-1-3-2 showed desirable heterosis and SCA effect for maturity characters. Regarding to SCA and heterosis, the prominent hybrids for grain yield were TSK197×R13-1-10, TSK194×POP31Q, DMR9047×POP31Q and R13-1-1×DMR9047. SCA established stronger relationship with per se performance of grain yield and quality traits than mid-parent (MPH) and best-parent heterosis (BPH), reflecting that an improvement in selection of SCA will results in an indirect improvement of MPH and BPH of hybrids.

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“…The diagnosis made on agricultural issues now needs to be done as part of the process of formulating the strategy. Through the diagnosis of current agricultural problems, it is hoped that the root causes of the problem will be clearly and authentically as well as conducting studies related to agricultural diseases that appear at this time which are then used as innovation materials to prepare the quality of agricultural products in the future [2].…”

Section: Introductionmentioning

confidence: 99%

Ideal Agricultural Agent as a Logical Solution and Investment

Umbara¹,

Sulistyowati²,

Noor³

et al. 2019

WJAR

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Future agricultural quality is the result of efforts made by agricultural observers at the present time. An expectation of optimal future agricultural quality is a challenge for observers of agriculture in Saudi Arabia, specifically as a material for thought for agricultural extension workers. The role of agricultural extension agents is the spearhead sharpening the achievement of future agricultural goals. Therefore, the quality of agricultural extension agents becomes the starting point for achieving these objectives. Some of the competencies that must be possessed by agricultural extension workers so that they are worthy of being declared as ideal counselors who are able to view the future as a benchmark for developing agricultural concepts at this time, namely motive, innate competency, self-concept, knowledge and skills. Through the mastery of all these competencies, the agricultural instructor deserves to be declared as the ideal agricultural extension agent as a solution and investment in the future in a logical manner.

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Combining ability and nature of gene action in maize (Zea mays L) inbred lines for resistance to gray leaf spot disease (Cercospora zeae maydis) in Ethiopia

Cited by 11 publications

References 34 publications

Combining ability between common bean gene groups for root distribution trait

Combining ability between common bean gene groups for root distribution trait

Heterosis, Combining Ability and Their Inter-Relationship for Morphological and Quality Traits in Yellow Maize (Zea mays L.) Single-Crosses Across Environments

Ideal Agricultural Agent as a Logical Solution and Investment

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