Physiological determinants of fertile floret survival in wheat as affected by earliness per se genes under field conditions

Prieto, Paula; Ochagavía, Helga; Savin, Roxana; Griffiths, Simon; Slafer, Gustavo A.

doi:10.1016/j.eja.2018.07.008

Cited by 25 publications

(25 citation statements)

References 34 publications

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“…Some recent studies have shown the possible relevance of Eps genes not only in fine adjusting anthesis time, but also through affecting spikelet number (Alvarez et al, 2016) and grains per spike (Lewis et al, 2008). This is in line with the hypothesis that genes effecting developmental traits might alter the dynamics of organs initiated in response to changes in the duration (Ferrante et al, 2013;González et al, 2005b;Miralles and Richards, 2000;Prieto et al, 2018aPrieto et al, , 2018bSnape et al, 2001). The dynamics of organs such as tillers, spikelets and florets (resulting a posteriori in yield components) may well depend, at least in part, upon the time allocated for their development.…”

Section: Introductionsupporting

confidence: 75%

“…Genetic factors controlling the duration of the developmental phases would be expected to have pleiotropic effect on yield traits (Börner et al, 1993;Foulkes et al, 2004). Certainly, a number of studies have shown that modifying the duration of particular developmental phases either through genetic factors (Gawroński et al, 2014;Lewis et al, 2008;Ochagavía et al, 2018a;Pérez-Gianmarco et al, 2018;Prieto et al, 2018a) or environmental treatments (González et al, 2005a(González et al, , 2003a(González et al, , 2003bSerrago et al, 2008;Steinfort et al, 2017;Wall and Cartwright, 1974) improves spike fertility; which in turn is a major determinant of wheat yield (Slafer et al, 2014;Würschum et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

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Wheat developmental traits as affected by the interaction betweenEps-7Dand temperature under contrasting photoperiods with insensitivePpd-D1background

Basavaraddi

Savin

Griffiths

et al. 2020

Preprint

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Earliness per se (Eps) genes are important to fine tune adaptation, and studying their probable pleiotropic effect on wheat yield traits is worthwhile. In addition, it has been shown that some Eps genes interact with temperature. We studied two NILs differing in the newly identified Eps-7D but carrying insensitive Ppd-D1 in the background under three temperature regimes (9, 15 and 18 °C) and two photoperiods (12 h and 24 h). Eps-7D affected time to anthesis as expected and the Eps-7D-late allele extended both the period before and after terminal spikelet. The interaction effect of Eps-7D × temperature was significant but not cross-over: the magnitude and level of significance of the difference between NILs with the late or early allele was affected by the growing temperature (i.e. difference was least at 18 °C and largest at 9 °C), and differences in temperature sensitivity was influenced by photoperiod. Rate of leaf initiation was faster in NIL with Eps-7D-early than with the late allele which compensated for the shorter duration of leaf initiation resulting in similar final leaf number between two NILs. Eps-7D-late consistently increased spike fertility through improving floret primordia survival as a consequence of extending the late reproductive phase.

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Section: Introductionsupporting

confidence: 75%

Section: Introductionmentioning

confidence: 99%

Wheat developmental traits as affected by the interaction betweenEps-7Dand temperature under contrasting photoperiods with insensitivePpd-D1background

Basavaraddi

Savin

Griffiths

et al. 2020

Preprint

Self Cite

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“…In contrast, floral development occurred earlier, and seed numbers were maintained under high ambient temperatures in both wild-type Ppd-1 and elf3 mutants ( Ejaz and von Korff, 2017 ). In wheat, allelic variation for ELF3 is likely to underpin an Earliness per se locus ( Eps-D1 ), which interacts with temperature to regulate flowering time, spikelet number, and floret fertility ( Lewis et al , 2008 ; Prieto et al , 2018 ; Ochagavía et al , 2019 ). Early-flowering alleles of Eps-D1 accelerate flowering, reduce spikelet number, and increase floret fertility, particularly when grown at cool temperatures (9–12 °C), while late alleles increase floret fertility at warmer temperatures (18 °C) ( Lewis et al , 2008 ; Prieto et al , 2018 ; Ochagavía et al , 2019 ).…”

Section: Molecular Mechanisms Influencing Responses To Temperaturementioning

confidence: 99%

“…In wheat, allelic variation for ELF3 is likely to underpin an Earliness per se locus ( Eps-D1 ), which interacts with temperature to regulate flowering time, spikelet number, and floret fertility ( Lewis et al , 2008 ; Prieto et al , 2018 ; Ochagavía et al , 2019 ). Early-flowering alleles of Eps-D1 accelerate flowering, reduce spikelet number, and increase floret fertility, particularly when grown at cool temperatures (9–12 °C), while late alleles increase floret fertility at warmer temperatures (18 °C) ( Lewis et al , 2008 ; Prieto et al , 2018 ; Ochagavía et al , 2019 ). The variable response of the Eps-D1 alleles at lower temperatures is potentially dependent on differences in ELF3 expression, which is significantly different between early and late alleles at 12 °C, but not 18 °C ( Ochagavía et al , 2019 ).…”

Section: Molecular Mechanisms Influencing Responses To Temperaturementioning

confidence: 99%

Feeling the heat: developmental and molecular responses of wheat and barley to high ambient temperatures

Jacott

Boden

2020

Journal of Experimental Botany

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The increasing demand for global food security in the face of a warming climate is leading researchers to investigate the physiological and molecular responses of cereals to rising ambient temperatures. Wheat and barley are temperate cereals whose yields are adversely affected by high ambient temperatures, with each 1 °C increase above optimum temperatures reducing productivity by 5–6%. Reproductive development is vulnerable to high-temperature stress, which reduces yields by decreasing grain number and/or size and weight. In recent years, analysis of early inflorescence development and genetic pathways that control the vegetative to floral transition have elucidated molecular processes that respond to rising temperatures, including those involved in the vernalization- and photoperiod-dependent control of flowering. In comparison, our understanding of genes that underpin thermal responses during later developmental stages remains poorly understood, thus highlighting a key area for future research. This review outlines the responses of developmental genes to warmer conditions and summarizes our knowledge of the reproductive traits of wheat and barley influenced by high temperatures. We explore ways in which recent advances in wheat and barley research capabilities could help identify genes that underpin responses to rising temperatures, and how improved knowledge of the genetic regulation of reproduction and plant architecture could be used to develop thermally resilient cultivars.

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“…in breeding programs. For instance, as a reasonable response to the intensified drought stress and high temperatures during late season, earliness is considered as a vital solution in developing current genotypes into the vulnerable environments, based on the physiological mechanism of stress avoidance (Hu et al, 2005;Mondal et al, 2013;Mwadzingeni et al, 2016;Prieto et al, 2018). Therefore, it seems that irrespective the time of occurrence of phenological events (e.g.…”

Section: Introductionmentioning

confidence: 99%

The double-edge sword of heterogeneous ripening pattern in winter wheat cultivar mixtures: A case study under post-anthesis water stress

Haghshenas

Emam

Sepaskhah

et al. 2019

Preprint

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Wheat cultivar mixtures with heterogeneous phenology has a less-explored potential to improve crop diversity, yield stability, and agronomic features particularly in response to the currently increased environmental stresses and uncertainties. To investigate the option of using wheat cultivar mixtures with different ripening patterns for mitigating the adverse effects of postanthesis water stress, a two-year field experiment was conducted during 2014-15 and 2015-16 growing seasons at the research field of School of Agriculture, Shiraz University, Iran. The factorial experiment was a Randomized Complete Block Design with 3 replicates, in which 15 mixture treatments including monocultures and every 11 possible mixtures of four early-to middle-ripening wheat cultivars were grown under two normal and post-anthesis deficitirrigation conditions. Measured traits and estimated indices included grain yield and its components, canopy temperature, soil water content, water productivity, susceptibility index, and water use efficiency. The results indicated that under the stressful condition of post-anthesis deficit-irrigation, heterogeneity in the ripening pattern of mixtures was declined. Consequently, dissimilarities in grain yields as well as various agronomic characters of mixture treatments were also lessened. This may be an evidence for the negative effect of water shortage stress on heterogeneity within agroecosystems. Although cultivar mixtures showed some casual advantages in some traits, such beneficial effects were not consistent across all conditions. Moreover, no cultivar mixture produced higher grain yield than the maximum monoculture. Despite the general expectation for beneficial ecological services from cultivar mixtures, in many cases disadvantageous blends were found which led to a considerable reduction in grain yield and water productivity. Therefore, it is suggested that unless the performance, and preferably the involved mechanisms, of cultivar mixtures are not fully understood, use of blends as an alternative for conventional high-input wheat cropping systems may lead to adverse results. a potential solution for water deficit conditions prevailed in semi-arid areas (Haghshenas et al., 2013;Fang et al., 2014;Adu-Gyamfi et al., 2015;Wang et al., 2016).One kind of dissimilarities among the mixture components considered for designing cultivar blends are phenological differences, which are physiologically vital enough to mainly determine the fate of interaction between the crop and environment. Accordingly, Haghshenas et al., (2013) evaluated the option of mitigating the intensified post-anthesis competition within the mixed canopy of two early-and middle-ripening wheat cultivars, and reported that the intra-specific competition under various seasons and irrigation conditions was several percent lower in mixtures, compared with monocultures; however, this relative advantage did not lead to significantly higher grain yield and post-anthesis water use efficiency. Besides, the equal mixing ratio (1:1) of th...

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Physiological determinants of fertile floret survival in wheat as affected by earliness per se genes under field conditions

Cited by 25 publications

References 34 publications

Wheat developmental traits as affected by the interaction betweenEps-7Dand temperature under contrasting photoperiods with insensitivePpd-D1background

Wheat developmental traits as affected by the interaction betweenEps-7Dand temperature under contrasting photoperiods with insensitivePpd-D1background

Feeling the heat: developmental and molecular responses of wheat and barley to high ambient temperatures

The double-edge sword of heterogeneous ripening pattern in winter wheat cultivar mixtures: A case study under post-anthesis water stress

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