The Genetical Analysis and Exploitation of Differential Responses to Herbicides in Crop Species

Snape, J.W.; Parker, Beryl; Leckie, D.; Nevo, Eviatar

doi:10.1016/b978-0-7506-1101-5.50067-x

Cited by 5 publications

(4 citation statements)

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“…Natural populations of wild emmer have wide genotypic variations in agronomic traits (Nevo et al 2002, and references therein). These traits can be grouped as: (1) agronomic, including biomass, earliness, grain nitrogen content, and yield (Nevo 2001); (2) amino acid composition ; (3) protein quality and quantity including high grain protein, novel gliadins, and glutenins (Nevo et al 1986b;Nevo and Payne 1987;Pagnotta et al 1995;Xu et al 2004;Uauy et al 2006b;Qi et al 2006;Li et al 2007); (4) micronutrient contents (Cakmak et al 2000(Cakmak et al , 2004; (5) abiotic stress tolerances including salt, drought, and heat Khanna-Chopra and Viswanathan 1999;Peleg et al 2005Peleg et al , 2006; (6) herbicide resistances (Krugman et al 1995(Krugman et al , 1997Snape et al 1991); and (7) biotic stress tolerances including powdery mildew (Moseman et al 1984;Nevo et al 1985), Fusarium head blight (Buerstmayr et al 2003;Stack et al 2002;Oliver et al 2007), leaf rust, stem rust, stripe rust , Nevo et al 1986aAnikster et al 2005), wheat soil-borne mosaic virus (Hunger et al 1992), tan spot (Pyrenophora tritici-repentis) (Chu et al 2008;Singh et al 2006Singh et al , 2007, Stagonospora nodorum leaf blotch (Singh et al 2007;Chu et al 2008), and insects (alpha-amylase inhibitor) (Wang et al 2008).…”

Section: Traits and Genes Identiwed And Mapped In T Dicoccoidesmentioning

confidence: 97%

Wild emmer: genetic resources, gene mapping and potential for wheat improvement

2008

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Wild emmer, Triticum dicoccoides, the progenitor of cultivated wheat, harbors rich genetic resources for wheat improvement. They include many agronomic traits such as abiotic stress tolerances (salt, drought and heat), biotic stress tolerances (powdery mildew, rusts, and Fusarium head blight), grain protein quality and quantity, and micronutrient concentrations (Zn, Fe, and Mn). In this review, we summarize (1) traits and controlling genes identiWed and mapped in T. dicoccoides; and (2) the genes transferred to cultivated wheat from T. dicoccoides. These genes, controlling important agronomic traits such as disease resistance, high protein and micronutrient content, should contribute to wheat production and food nutrition. However, most of the rich genetic reservoir in wild emmer remains untapped, highlighting the need for further exploration and utilization for long-term wheat breeding programs.

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Section: Traits and Genes Identiwed And Mapped In T Dicoccoidesmentioning

confidence: 97%

Wild emmer: genetic resources, gene mapping and potential for wheat improvement

2008

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“…Early development in short days can be conferred by photoperiod insensitivity (PI). Ppd-D1a is the most potent known PI allele and the dominant source of PI in European (Snape et al 1991) and Asian cultivars (Yang et al 2009;Kiss et al 2014). Two further Ppd-1 homeologous genes have been mapped to the short arm of group 2 chromosomes in wheat and alleles conferring PI have been identified: Ppd-A1a allele, as for Ppd-D1a, is associated with an upstream deletion within a pseudo-response element (Beales et al 2007;Wilhelm et al 2009) and predominates in modern durum wheat (Bentley et al 2011); Ppd-B1a is a result of an increased gene copy number (Díaz et al 2012;Kiss et al 2014), carried by almost a quarter of wheat genotypes from Europe, Asia and America, and therefore the second most important Ppd-1a allele in global wheat germplasm (Kiss et al 2014).…”

Section: Introductionmentioning

confidence: 99%

“…Effects of Ppd-1 alleles on mean flowering date are well-documented and in the field are likely to depend on daylength progression during different growth stages (GSs), and hence interact with latitude, sowing date, temperature and other genetic components of developmental rate such as Vrn and eps status (Snape et al 1991;Foulkes et al 2004;González et al 2005;Kiss et al 2014). As well as mean flowering date, however, an adaptive trait that has received little attention to date is the extent to which duration of flowering, i.e.…”

Section: Introductionmentioning

confidence: 99%

Photoperiod sensitivity affects flowering duration in wheat

et al. 2016

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SUMMARYFlowering and successful pollination in wheat are key determinants of both quantity and quality of grain. Bread wheat line 'Paragon', introgressed with single or multiple daylength insensitivity alleles was used to dissect the effects on the timing and duration of flowering within a hierarchical plant architecture. Flowering of wheat plants was observed in a series of pot-based and field experiments. Ppd-D1a was the most potent known allele affecting the timing of flowering, requiring the least thermal time to flowering across all experiments. The duration of flowering for individual lines was dominated by the shift in the start of flowering in later tillers and the number of tillers per plant, rather than variation in flowering duration of individual spikes. There was a strong relationship between flowering duration and the start of flowering with the earliest lines flowering for the longest. The greatest flowering overlap between tillers was recorded for the Ppd-1b. Across all lines, a warmer environment significantly reduced the duration of flowering and the influence of Ppd-1a alleles on the start of flowering. These findings provide evidence of pleiotropic effects of the Ppd-1a alleles, and have direct implications for breeding for increased stress resilient wheat varieties.

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“…The cultivation of herbicide‐tolerant wheat ( Triticum aestivum L.) could soon be a reality. There are already selective cultivars tolerant to chlortoluron obtained by traditional breeding (Snape et al. , 1991; Sixto et al.…”

Section: Introductionmentioning

confidence: 99%

The response of Bromus diandrus and Lolium rigidum to dalapon and glyphosate I: baseline sensitivity

Barroso¹,

Loureiro²,

Escorial³

et al. 2010

Weed Research

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The establishment of Bromus diandrus and Lolium rigidum baseline sensitivity to glyphosate and dalapon herbicides was studied for the North Central region of Spain. A rapid method in Petri dishes and a plant assay method were evaluated. The studied populations of both weed species showed sensitivity to both herbicides. The rapid method to establish the sensitivity baseline for these species worked properly for dalapon and a good correlation was found between Petri dish and plant assays. In the case of glyphosate, the rapid method was not sensitive enough, so baseline sensitivity establishment would have to be determined with plant assays. The baseline sensitivities will allow us to determine quickly and accurately any variation in the sensitivity of these weeds against these herbicides over time and to detect, at an early stage, the beginning of any trends towards resistance.

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The Genetical Analysis and Exploitation of Differential Responses to Herbicides in Crop Species

Cited by 5 publications

References 0 publications

Wild emmer: genetic resources, gene mapping and potential for wheat improvement

Wild emmer: genetic resources, gene mapping and potential for wheat improvement

Photoperiod sensitivity affects flowering duration in wheat

The response of Bromus diandrus and Lolium rigidum to dalapon and glyphosate I: baseline sensitivity

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