Resistance of maize to the maize weevil: III. Grain weight loss assessment and implications for breeding

Derera, John; Pixley, K.V.; Giga, D. P.; Makanda, Itai

doi:10.1016/j.jspr.2014.04.004

Cited by 29 publications

(25 citation statements)

References 20 publications

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“…The results indicated a decrease in DSI with hybridization except for crosses with female parent Maksoy 1N and S-Line 9.2 (Table 3), thus implying that hybridization can increase resistance probably by reducing the number of ABE and increasing the MDP. Derera et al (2014) also reported similar findings. Similar results were observed in the reciprocal crossing which showed no significant influence on DSI.…”

Section: Discussionsupporting

confidence: 68%

Genetics of Resistance in F2 Soybean Populations for Adzuki Bean Bruchid (Callosobruchus chinensis)

Msiska¹,

Hailay²,

Miesho³

et al. 2018

JAS

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Adzuki bean bruchid (Callosobruchus chinensis) is a significant pest of soybean in Uganda. To sustainably manage this pest, utilization of resistant soybean varieties is the key solution. Development of resistant varieties needs knowledge on modes of inheritance which is crucial in selection of parent materials. To identify parents, a study was initiated to determine the gene action and mode of inheritance of resistance to bruchids in soybean. Nine parental lines were crossed in a full-diallel at Makerere University Agricultural Institute, Uganda. The generated F1s were advanced to F2 and seeds were evaluated for response to bruchid infestation in a randomised complete block design. Ten seeds were infested with 10 randomly selected unsexed 1-3 day old bruchids. Genotypes showed significant differences in seed weight loss (swl), adult bruchid emergence (ABE) and Dobie susceptibility index (DSI) indicating that these parameters could be used to screen genotypes in genetic analysis. Mean squares of general combining ability (GCA) were significant (P < 0.05) for swl, DSI and number of ABE from the F2 seeds indicating additive gene action. Susceptibility parameters ABE and DSI showed significant specific combining ability (SCA) indicating non-additive gene action. Resistance was influenced by maternal effects indicating that direction of the cross was important. Genotypes S-Line 9.2 and S-Line 13.2A showed negative significant GCA effects for at least two of the susceptibility parameters indicating that they were the best parents for bruchid resistance breeding. The study established that additive, non additive and maternal effects governed the gene expression in soybean resistance to bruchids.

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Section: Discussionsupporting

confidence: 68%

Genetics of Resistance in F2 Soybean Populations for Adzuki Bean Bruchid (Callosobruchus chinensis)

Msiska¹,

Hailay²,

Miesho³

et al. 2018

JAS

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“…Grain resistance is one of the most sustainable control measures against the maize weevil and a major component of integrated pest management, which is cheaper and safer ecologically (Abebe et al 2009;Tefera et al 2011a). Weevil resistance has been identified in various maize germplasm (Widstrom et al 1983;Li et al 1998;García-Lara et al 2009;Dari et al 2010;Mwololo et al 2012;Derera et al 2014). However, introgression of weevil resistance and deployment of weevil resistant maize cultivars is still limited in Uganda and elsewhere in tropical and subtropical environments.…”

Section: Introductionmentioning

confidence: 99%

Response of maize population “Longe5” to two cycles of modified S1 recurrent selection for resistance to maize weevil

2015

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The maize weevil (Sitophilus zeamais Mostch.) is one of the most damaging storage pests causing significant reductions in grain weight and quality in tropical and subtropical regions. The current study determined the effectiveness of two cycles of modified S 1 recurrent selection towards the improvement of weevil resistance in the maize variety ''Longe5''. Grain yield and resistance to Turcicum leaf blight, grey leaf spot and rust diseases, which occurred naturally at the time of experimentation, were also evaluated to enhance the overall worth of the maize variety. Selections were made by identifying and self-pollinating the foliar disease resistant and vigorous plants, with potentially big well-placed ears from the base population of the Longe5 (the original cycle i.e., C 0 ), grown at the National Crops Resources Research Institute, Namulonge, in Uganda. Over 540 selfed ears were obtained from the C 0 and were screened for maize weevil resistance under controlled conditions in the laboratory, after which 162 weevil resistant genotypes were selected and recombined in an isolated field to generate the C 1 . The second cycle (C 2 ) was generated from the C 1 in a similar procedure, by recombining 190 weevil resistant genotypes. The C 0 , C 1 , and C 2 were evaluated for grain yield and reaction to foliar diseases at three locations, and the ensuing seed was screened for maize weevil resistance in the laboratory. Significant gains were obtained for maize weevil resistance. There was a reduction in grain weight loss due to maize weevil damage of 65 % in C 2 and 15 % in C 1 . There was a 33 % reduction in the number of weevil progenies emerging in C 2 and 19 % in C 1 grain. Similar positive trends were realized for grain yield and resistance to foliar diseases in C 1 and C 2 compared to C 0 . The results indicate that the modified S 1 recurrent selection was effective in improving Longe5 for maize weevil resistance.

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“…The current study examined the combined effect of hermetic bag and insect resistant maize to establish if some benefits would be gained in grain protection against P. truncatus and S. zeamais in stored maize. Grain weight loss is the most important criterion used to classify maize into either resistant or susceptible varieties (Derera et al, 2014;Mwololo et al, 2012). The treatment combination showed that storing either resistant (CKPH08028) or susceptible maize (PH3253) in hermetic PICS or SuperGrain II™ bags under same conditions had similar protection as indicated by the percentage grain weight loss except for Smartbag -1 and polypropylene bags after 180 days of storage.…”

Section: Discussionmentioning

confidence: 99%

Combined Effect of Hermetic Bag and Insect Resistant Variety for the Control of Larger Grain Borer and Maize Weevil in Stored Maize

Likhayo¹,

Tefera²,

Mugo³

et al. 2015

IJSR

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Resistance of maize to the maize weevil: III. Grain weight loss assessment and implications for breeding

Cited by 29 publications

References 20 publications

Genetics of Resistance in F2 Soybean Populations for Adzuki Bean Bruchid (Callosobruchus chinensis)

Genetics of Resistance in F2 Soybean Populations for Adzuki Bean Bruchid (Callosobruchus chinensis)

Response of maize population “Longe5” to two cycles of modified S1 recurrent selection for resistance to maize weevil

Combined Effect of Hermetic Bag and Insect Resistant Variety for the Control of Larger Grain Borer and Maize Weevil in Stored Maize

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