Combining ability and gene action of three components of horizontal resistance against rice blast

Mulbah, Quaqua S.; Shimelis, Hussein; Laing, Mark

doi:10.1007/s10681-015-1522-0

Cited by 9 publications

(8 citation statements)

References 19 publications

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“…However, the additive portion was greater than the non-additive, suggesting that additive gene effects contribute more to silicon uptake ability and resistance to rice blast. Similar results were reported [14]. The low GCA values obtained in the genotypes used (GIZA 182 and E20) indicated their importance in contributing resistance to rice blast in crosses involving them.…”

Section: Combining Ability For Resistance To Rice Blastsupporting

confidence: 83%

“…Understanding the mode of inheritance of resistance to rice blast is essential to facilitate the resistance breeding. Since the inheritance of resistance to rice blast or rice high silicon uptake ability in the genotypes depends on the genotype involved in the crossing, the pathogen race and environmental condition, it is important to assess the pattern of inheritance in every new resistance sources before the start of the breeding work [14]. The analysis of data from this study showed significant differences among the progenies tested with their parents.…”

Section: Combining Ability For Resistance To Rice Blastmentioning

confidence: 85%

“…However, other genotypes showed positive GCA effects, suggesting their poor contribution for resistance to rice blast when crossed with other parents. Parent E20 with high negative GCA effects was potentially superior and may be included in breeding programs to introduce resistance to susceptible cultivars which otherwise have acceptable traits [14].…”

Section: Combining Ability For Resistance To Rice Blastmentioning

confidence: 99%

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Inheritance of Silicon Uptake Ability in Rice Blast Resistant Varieties

Jackson

Rubaihayo

Wasswa

et al. 2019

AJRCS

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Rice blast disease is the most destructive disease to rice plants and can cause a lost in a yield ranging from 50 to 100%. To develop resistant genotypes, it is necessary to determine the source of resistance, the nature of resistance and the mode of gene action that gives resistance to the disease. It is known that Silicon enhances durable resistance to rice blast disease. The rice silicon uptake inheritance can be studied through crossing the high silicon uptake with low silicon uptake genotypes. Seven genotypes were crossed in a full-dialel design, two genotypes having very high silicon uptake ability, two having moderate silicon ability, two having low silicon uptake ability and the last one was having very low silicon ability. The F1 plants were selfed and F2 plants were tested for silicon uptake ability. Then genetic traits of the segregating F2 populations and their parents were analyzed in order to determine the heritability. A high narrow sense coefficient of genetic determination suggested that there was a considerable heritability of resistance for rice blast. The analysis of gene action revealed that additive gene effects contributed more than the non-additive effects for the inheritance of silicon uptake ability as indicated by high Baker’s ratio (above 0.8 and 0.3) for both silicon uptake and water lose respectively. Genotypes, GIZA182 and E20 were found to have the most desirable GCA among the genotypes used in the study.

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Section: Combining Ability For Resistance To Rice Blastsupporting

confidence: 83%

Section: Combining Ability For Resistance To Rice Blastmentioning

confidence: 85%

Section: Combining Ability For Resistance To Rice Blastmentioning

confidence: 99%

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Inheritance of Silicon Uptake Ability in Rice Blast Resistant Varieties

Jackson

Rubaihayo

Wasswa

et al. 2019

AJRCS

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“…While Mulbah, Shimelis, and Laing (2015) and Vanderplank (1984) attested that components of horizontal resistance include traits such as lesion size, and speed at which lesion spreads over the affected leaf area. Srinivasachary, Shailaja Hittalmani, Girish Kumar, Shashidhar, and Vaishali (2002) and Vinod, Vivekanandan, and Subramanian (1990) reported a strong relationship between sheath rot of rice and panicle exsertion.…”

mentioning

confidence: 99%

Genetic analysis of mechanisms associated with inheritance of resistance to sheath rot of rice

et al. 2017

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Understanding genetic mechanisms controlling inheritance of disease resistance traits is essential in breeding investigations targeting development of resistant genotypes. Using North Carolina design II, 32 F 1 hybrids were generated by crossing eight susceptible to four resistant parents and submitted for field evaluation. The analysis of general and specific combining ability (GCA and SCA) indicated involvement of additive and non-additive gene action controlling inheritance of horizontal resistance to sheath rot of rice. High GCA/SCA ratio and high heritability estimates revealed additive effects and were more predominant than none additive ones. The level of dominance indicated dominant genes was more important than recessive genes. Estimates of GCA and SCA analysis suggested that crop improvement programmes should be directed towards selection of superior parents or good combiners, emphasizing on GCA. As far as source of resistance is concerned, most promising genotypes were Cyicaro, Yunertian and Yunkeng. The predominance of additive genetic effects together with the relevance of dominant genes suggested possibilities of improving the resistance by introgression of resistance genes through recurrent selection coupled with phenotypic selection.

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“…Further more significant differences in the three parameters of swl, ABE and DSI indicated that genes controlling soybean resistance to C. chinensis lack dominance (Abakemal et al, 2011) and their gene action is additive, therefore the expression of the offspring were intermediate (Table 4). This suggests that selection of parents to generate resistant crosses and developing resistant pure line cultivars is possible (Mulbah et al, 2015). These results further indicated that selection would be effective and it could be used to fix resistance in cultivars (Fasahat et al, 2016).…”

Section: Discussionmentioning

confidence: 82%

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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Combining ability and gene action of three components of horizontal resistance against rice blast

Cited by 9 publications

References 19 publications

Inheritance of Silicon Uptake Ability in Rice Blast Resistant Varieties

Inheritance of Silicon Uptake Ability in Rice Blast Resistant Varieties

Genetic analysis of mechanisms associated with inheritance of resistance to sheath rot of rice

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

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