Genetic variation in the trait root distribution over segregating generations of common bean

Melo, Rita Carolina de; Schmit, Rodolfo; Cerutti, Paulo Henrique; Guidolin, Altamir Frederico

doi:10.1007/s10681-015-1568-z

Cited by 13 publications

(14 citation statements)

References 46 publications

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“…The predominance of additive gene effects for plant architecture-related traits have been studied in wheat (Gowda et al, 2012), in common bean (Moura et al, 2018), and in hybridizations between Andean and Mesoamerican common bean gene groups (Mukankusi et al, 2011). 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: 99%

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: 99%

Combining ability between common bean gene groups for root distribution trait

et al. 2020

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“…Changes in root architecture (depth, efficiency and distribution, for example) have been effective in capturing and allocating resources for plant growth and development, which indirectly leads to tolerance to abiotic stresses (Lynch 1995, 2007, 2014, da Silva and Delatorre 2009, Miguel et al 2013, de Melo et al 2016. However, breeding programs have exhaustively targeted the selection LUIS P.S.…”

Section: Introductionmentioning

confidence: 99%

“…However, breeding programs have exhaustively targeted the selection LUIS P.S. VELHO et al of genotypes only considering the traits of the aerial part of the plant, while little attention has been paid to the study on root distribution, especially under field conditions (Miguel et al 2013, Toaldo et al 2013, de Melo et al 2016.…”

Section: Introductionmentioning

confidence: 99%

Root distribution and its association with bean growth habit

Velho

Melo

Bernardy

et al. 2018

An. Acad. Bras. Ciênc.

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Associations between root distribution and bean growth habit may contribute to the selection of genotypes adapted to restrictive environments. The present work aimed to relate and compare root distribution with the growth habit in beans. 10 bean genotypes of different growth habits (I, II and III) were evaluated for root distribution in two agricultural years (2014/15 and 2015/16). The genotypes responded similarly for the trait root distribution throughout the agricultural years, without any simple effect of the genotype x year interaction. The factors genotype and years were significant for the trait. The genotypes of a determinate habit showed significant differences compared to other genotypes (II and III), which were ascribed to their poor performance in the average of years. They include the Carioca Precoce, which showed a behavior similar to the other habits. It could be considered a "plastic" genotype under restrictive conditions. The contrasts revealed significant differences between the growth habits II vs I (2.87) and III vs I (3.64) for root distribution. The differences were also significant for grain yield. Thus, genotypes of indeterminate growth habit show greater root distribution than those of a determinate habit, regardless of the agricultural years. Therefore, they are promising for use in blocks of crosses, when the purpose is the selection of cultivars adapted to low input environments.

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“…In other words, the homozygous condition of the genes is restored due to the natural process of Throughout the segregating generations, increased loci in homozygosis or decreased frequency of heterozygous genotypes naturally led to increased endogamy, which was rapidly achieved through self-pollination and distribution of genetic variance (Fehr 1987). Previous studies conducted by Toaldo et al (2013) and De Melo et al (2016) found that the F 2 and F 3 hybrid populations showed hybrid vigor or heterosis, compared to their parents. However, due to the lack of economically feasible alternatives to obtain commercial hybrids in beans (Ramalho et al 1993), the breeding program must advance the segregating generations to obtain a fixed population.…”

Section: Resultsmentioning

confidence: 86%

“…The latter consume large amounts of energy and natural resources and cause environmental pollution (Bishopp and Lynch 2015). However, since the phenotyping of this trait is expensive, research works on genetic inheritance are still scarce and incipient (Toaldo et al 2013, De Melo et al 2016.…”

Section: Introductionmentioning

confidence: 99%

Inheritance of root distribution in common bean and selection strategy

Melo

Trevisani

Corrêa

et al. 2018

Crop Breed. Appl. Biotechnol.

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The objective was to determine the predominant genetic inheritance in the trait root distribution in common bean and define the selection strategy. An experiment involving 40 genetic constitutions (segregating and fixed populations), was developed during the agricultural years 2014/15 and 2015/16. The experiment was arranged in a Federer's augmented block design with 3 replicates. The root distribution was evaluated by Bohm method. Estimates of mean contrasts between the F 4 progenies and their parents did not reveal any significant differences in any comparison. The generations F 5 and F 6 presented the same behavior. The distribution of the component of the additive genetic variance was similarly conducted for the segregating generations. Thus, since the predominant inheritance of the root distribution is additive, the selection of this trait is recommended to be performed at the end of the breeding program.

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Genetic variation in the trait root distribution over segregating generations of common bean

Cited by 13 publications

References 46 publications

Combining ability between common bean gene groups for root distribution trait

Combining ability between common bean gene groups for root distribution trait

Root distribution and its association with bean growth habit

Inheritance of root distribution in common bean and selection strategy

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