Floret development and grain setting differences between modern durum wheats under contrasting nitrogen availability

Ferrante, Ariel; Savin, Roxana; Slafer, Gustavo A.

doi:10.1093/jxb/ers320

Cited by 107 publications

(91 citation statements)

References 24 publications

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“…Water stress during meiosis significantly reduced ( p < 0.01) seed set compared to non-stressed plants. For the 46 tested wheat genotypes, the mean seed set under non-stressed conditions was 68%, because not all fertile florets had the potential of setting into grains, similar result has been previously reported in Ferrante et al (2013) where increase in nitrogen availability affected the number of fertile florets and the number of grains the florets produce at maturity - the relationship of wheat spike fertility and seed set was also reported by Martino et al (2015). Under stressed conditions the mean seed set was reduced to 52%.…”

Section: Resultssupporting

confidence: 83%

Both Male and Female Malfunction Contributes to Yield Reduction under Water Stress during Meiosis in Bread Wheat

et al. 2017

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Water stress during meiosis in wheat is a major constraint to yield especially for the rainfed farming regions. Pollen sterility has been proposed as the most sensitive process leading to low seed set (low % of fertile spikelets), but here we show this is not universal, and that the development of female reproductive parts is equally if not more sensitive than male parts in many wheat cultivars. The first experiment examined water stress during meiosis in 46 wheat genotypes. The reduction in seed set varied widely, ranging from 6 to 48%. The second experiment differentiated the effect of water stress on the male or the female reproductive part in 13 wheat genotypes. Water stress was imposed during meiosis, with plants cross-pollinated 5 days later with pollen from stressed or unstressed plants used to pollinate emasculated stressed or unstressed female parts. Seed set and kernel weight were measured at maturity. Contrary to the well-held view that the male reproductive part is the major contributor to seed set reduction when water stress is experienced during meiosis, the stressed-female part was also a predominant contributor in four wheat genotypes among the 13 genotypes examined. This strongly indicates that both male and female parts are responsible for yield reduction when water-stressed during meiosis and suggests that it may be possible to breed tolerant wheat cultivars combining tolerance from both male and female reproductive parts.

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Section: Resultssupporting

confidence: 83%

Both Male and Female Malfunction Contributes to Yield Reduction under Water Stress during Meiosis in Bread Wheat

et al. 2017

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“…(1983), as described in Ferrante et al . (2010, 2013). The spikelets analysed were those in basal (fourth spikelet from the base), central (middle spikelet), and apical (fourth spikelet from the top) positions of the spike.…”

Section: Methodsmentioning

confidence: 99%

“…Grain number is related to the number of fertile florets (Kirby, 1988; Slafer and Andrade, 1993; Miralles et al ., 1998, 2000) and the latter is the end result of the dynamics of floret primordia generation/degeneration during the stem elongation phase (Kirby, 1988). Most frequently, what determines the number of fertile florets is the survival of primordia initiated rather than the number of primordia produced (Ferrante et al ., 2013 and references quoted therein). Understanding what determines floret mortality might be helpful to have a better physiological model of the process (Slafer et al ., 2005).…”

Section: Introductionmentioning

confidence: 99%

Is floret primordia death triggered by floret development in durum wheat?

Ferrante

Savin

Slafer

2013

Journal of Experimental Botany

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Survival of floret primordia initiated seems critical for the determination of grain number and yield in wheat, and understanding what determines floret mortality would help in the development of more robust physiological models of yield determination. The growth of the juvenile spikes has been frequently considered the determinant of grain number, implying that floret development would depend on resource availability and that the onset of floret death would be related to spike growth. However, this model has been recently challenged from a study concluding that floret death started when the most advanced floret primordia reached a particular developmental stage. As the few previous studies on this relationship involved photoperiod treatments which affect both floret development and the onset of spike growth, conclusions cannot be considered mechanistic. This comprehensive study analysed in detail floret development in wheat as affected by resource availability (mainly soil nitrogen levels) and found that the onset of floret death may occur when development of the most advanced florets ranged from stages 5 to 9 and that the average and standard deviation of floret developmental stage coinciding with the onset of floret death was not related to the level of availability of resources. These results provide further support to the model relating the onset of floret death with the initiation of active growth of the juvenile spike in which florets are developing.

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“…During the past two decades, many studies on yieldformation processes have been conducted on winter bread and durum wheat (Triticum durum Desf. ), grown in relatively low-yielding (unfavorable soil suitability) and high-yielding (favorable soil suitability) conditions across Mediterranean and temperate climate agroecosystems (Ferrante et al, 2012(Ferrante et al, , 2013García del Moral et al, 2003;Kumudini et al, 2008;Lynch et al, 2017;Thapa et al, 2019). To a lesser extent, these studies have concerned other species such as pearl millet [Pennisetum glaucum (L.) R.…”

Section: Crop Sciencementioning

confidence: 99%

“…(2014) have concluded that grain number per square meter is the dominant driver of wheat GY. In addition, this yield component limits GY in winter bread wheat and spring durum wheat grown in both unfavorable and favorable environments (Ferrante et al., 2012, 2013; Giunta, Pruneddu, & Motzo, 2019; Lynch et al., 2017; Peltonen‐Sainio, Kangas, Salo, & Jauhiainen, 2007; Prado et al., 2017; Slafer et al., 2014). The SN tended to have a closer relationship with grains per square meter than the NG/S in high‐yield‐potential cultivars in Irish environments (Lynch et al., 2017).…”

Section: Introductionmentioning

confidence: 99%

Impact of cultivar and environment soil suitability on the contribution of yield components to grain yield variation in spring wheat

et al. 2020

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The objectives of this study were to determine how modern cultivars of spring wheat (Triticum aestivum L. var. vulgare) and different soil conditions at locations in Poland affected grain yield (GY) of 15 cultivars and multiplicative yield components. The different ways in which the components contributed to GY variation created by environmental conditions—location, growing season, and crop management—across environments of favorable and unfavorable soil suitability for wheat cultivation were also determined. To assess the relationship between GY and its components for cultivars grown under two levels of soil suitability, path coefficient analysis was used. Cluster analysis of three GY components—the number of spikes per square meter (SN), the number of grains per spike (NG/S), and the thousand‐grain weight (TGW)—derived from different cultivar × soil suitability combinations was performed to identify groups of these combinations and to assess the ways in which yield components vary in their contribution to GY in the varied environments. Grain yield and its three components were significantly affected by main and interaction effects of the cultivar and the level of soil suitability. Grain yield in favorable and unfavorable soil suitability conditions was, respectively, 6.58–5.44 Mg ha−1. This decrease was due to a reduction in SN by 6.1% and in TGW by 11.8%, but NG/S was similar in both soil groups. Grain yield variability in response to the different environmental conditions was determined by similar contributions of the three yield components, almost independently of the cultivar, but in the favorable suitability, SN had a stronger impact on GY, whereas in unfavorable soil suitability for wheat cultivation, the importance of NG/S increased.

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Floret development and grain setting differences between modern durum wheats under contrasting nitrogen availability

Cited by 107 publications

References 24 publications

Both Male and Female Malfunction Contributes to Yield Reduction under Water Stress during Meiosis in Bread Wheat

Both Male and Female Malfunction Contributes to Yield Reduction under Water Stress during Meiosis in Bread Wheat

Is floret primordia death triggered by floret development in durum wheat?

Impact of cultivar and environment soil suitability on the contribution of yield components to grain yield variation in spring wheat

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