Identification of QTL Controlling Allelopathic Effects in Rice: Genetic Approaches to Biological Control of Weeds

Okuno, Kazutoshi; Ebana, Kaoru

doi:10.6090/jarq.37.77

Cited by 20 publications

(11 citation statements)

References 16 publications

(12 reference statements)

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“…, 2003) and rice (Jensen et al. , 2001; Okuno & Ebana, 2003), but so far there are no breeding programmes that I am aware of based on DNA markers for allelopathy.…”

Section: Discussionmentioning

confidence: 99%

Use of multivariate statistics to separate allelopathic and competitive factors influencing weed suppression ability in winter wheat

Bertholdsson

2011

Weed Research

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There is an increasing interest in an integrated, less herbicide-dependent approach to weed management, based on combinations of cultivation practices and competitive crops. More competitive cultivars are essential to this approach and breeders need to know how to breed such. It is known that early vigour and extensive early season vegetative growth are important traits. The questions are, which is most efficient to use in breeding and if allelopathy should be bred for? Weed suppressive ability (WSA) of 12 winter wheat, two rye and two triticale cultivars was studied in a 2-year field trial with natural weeds and under-sown Apera spica-venti and rapeseed (Brassica napus). Crop biomass, shoot length, straw length and plantlet root length and root weight were analysed. Biomass growth in autumn and spring was studied in weed-free plots using multispectral analysis. Grain yield, winter hardiness and maturity data were collected from official variety tests in Sweden. Allelopathic activity was assessed with use of a bioassay. Factor analysis showed that early season crop biomass and allelopathy were two traits explaining most of the variance in weed biomass. It was predicted by partial least square regression models that weed biomass could be reduced by 60%, if both crop biomass and allelopathy are improved to the levels of triticale. An improvement of allelopathy alone should reduce weed biomass by 18-28%. The factor analysis and multivariate models showed that WSA could be improved without a negative trade-off in grain yield or winter hardiness.

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“…, 2003) and rice (Jensen et al. , 2001; Okuno & Ebana, 2003), but so far there are no breeding programmes that I am aware of based on DNA markers for allelopathy.…”

Section: Discussionmentioning

confidence: 99%

Use of multivariate statistics to separate allelopathic and competitive factors influencing weed suppression ability in winter wheat

Bertholdsson

2011

Weed Research

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“…Granberry, 2016 Lactuca sativa X below-ground (n = 1) C P nr Ebana et al , 2001 Okuno andEbana, 2003 Oryza sativa (F2:3 families)…”

Section: Highlights On the Nature Of The Datamentioning

confidence: 99%

The genetics underlying natural variation of plant–plant interactions, a beloved but forgotten member of the family of biotic interactions

et al. 2018

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Despite the importance of plant-plant interactions on crop yield and plant community dynamics, our understanding of the genetic and molecular bases underlying natural variation of plant-plant interactions is largely limited in comparison with other types of biotic interactions. By listing 63 quantitative trait loci (QTL) mapping and global gene expression studies based on plants directly challenged by other plants, we explored whether the genetic architecture and the function of the candidate genes underlying natural plant-plant interactions depend on the type of interactions between two plants (competition versus commensalism versus reciprocal helping versus asymmetry). The 16 transcriptomic studies are unevenly distributed between competitive interactions (n = 12) and asymmetric interactions (n = 4, all focusing on response to parasitic plants). By contrast, 17 and 30 QTL studies were identified for competitive interactions and asymmetric interactions (either weed suppressive ability or response to parasitic plants), respectively. Surprisingly, no studies have been carried out on the identification of genetic and molecular bases underlying natural variation in positive interactions. The candidate genes underlying natural plant-plant interactions can be classified into seven categories of plant function that have been identified in artificial environments simulating plant-plant interactions either frequently (photosynthesis, hormones), only recently (cell wall modification and degradation, defense pathways against pathogens) or rarely (ABC transporters, histone modification and meristem identity/life history traits). Finally, we introduce several avenues that need to be explored in the future to obtain a thorough understanding of the genetic and molecular bases underlying plant-plant interactions within the context of realistic community complexity.

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“…In this way, some advances have been achieved in the identification of quantitative trait loci (QTL) associated with wheat192 and rice193, 194, 195 allelopathic character. Genes encoding hydroxamic acid biosynthesis have not yet been identified in the case of wheat, and the chemical nature of allelochemicals responsible for the allelopathic activity in rice is still unclear, even though there are some advances in the identification of genes encoding momilactone synthesis 196…”

Section: Proteomics and Genomicsmentioning

confidence: 99%

Allelopathy—a natural alternative for weed control

Macías

Molinillo

Varela

et al. 2007

Pest Management Science

392

273

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Allelopathy studies the interactions among plants, fungi, algae and bacteria with the organisms living in a certain ecosystem, interactions that are mediated by the secondary metabolites produced and exuded into the environment. Consequently, allelopathy is a multidisciplinary science where ecologists, chemists, soil scientists, agronomists, biologists, plant physiologists and molecular biologists offer their skills to give an overall view of the complex interactions occurring in a certain ecosystem. As a result of these studies, applications in weed and pest management are expected in such different fields as development of new agrochemicals, cultural methods, developing of allelopathic crops with increased weed resistance, etc. The present paper will focus on the chemical aspects of allelopathy, pointing out the most recent advances in the chemicals disclosed, their mode of action and their fate in the ecosystem. Also, attention will be paid to achievements in genomics and proteomics, two emerging fields in allelopathy. Rather than being exhaustive, this paper is intended to reflect a critical vision of the current state of allelopathy and to point to future lines of research where in the authors' opinion the main advances and applications could and should be expected.

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Identification of QTL Controlling Allelopathic Effects in Rice: Genetic Approaches to Biological Control of Weeds

Cited by 20 publications

References 16 publications

Use of multivariate statistics to separate allelopathic and competitive factors influencing weed suppression ability in winter wheat

Use of multivariate statistics to separate allelopathic and competitive factors influencing weed suppression ability in winter wheat

The genetics underlying natural variation of plant–plant interactions, a beloved but forgotten member of the family of biotic interactions

Allelopathy—a natural alternative for weed control

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