Wheat grain number: Identification of favourable physiological traits in an elite doubled-haploid population

García, Guillermo; Serrago, Román A.; González, Fernanda G; Slafer, Gustavo A.; Reynolds, M.P.; Miralles, Daniel J.

doi:10.1016/j.fcr.2014.07.018

Cited by 46 publications

(56 citation statements)

References 49 publications

(75 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The unique exception was the experiment conducted in Mexico by Garcia et al. () in which a nonsignificant positive relationship was found.…”

Section: Genetic Variation In Fruiting Efficiency Within Elite Germplasmmentioning

confidence: 92%

“…Expanding further the analysis, when the variation was not restricted to modern cultivars but to a much larger population of double haploid lines (Garcia et al. ), the general pattern that using chaff at maturity does consistently underestimate fruiting efficiency (and the higher the efficiency the greater the magnitude of the overestimation) is further emphasized (Fig. ).…”

Section: Pathways To Increase Fruiting Efficiencymentioning

confidence: 98%

“…In addition, we added data adapted from Garcia et al. () who analyzed variation among a mapping population with a much larger degree of variation than modern cultivars that broadly fall within the same cloud of data‐points but with an even smaller slope; data from the study in which spike dry weight was measured at anthesis and values at chaff were unpublished).…”

Section: Pathways To Increase Fruiting Efficiencymentioning

confidence: 99%

“…; García et al. ). Therefore, breeding through the Green Revolution improved spike growth (and consequently spike dry weight at anthesis) bringing about a reduced rate of floret mortality increasing the number of fertile florets (e.g., Miralles et al.…”

Section: Introductionmentioning

confidence: 97%

See 3 more Smart Citations

Fruiting efficiency: an alternative trait to further rise wheat yield

Slafer

Elía

Savin

et al. 2015

Food and Energy Security

Self Cite

124

107

View full text Add to dashboard Cite

Further improvements in wheat yields are critical, for which increases in grain number would be required. In the recent past, higher grain number was achieved through increased growth of the juvenile spikes before anthesis, due to the reduction in stem growth. As current cultivars have already an optimum height, alternatives must be identified for further increasing grain number. One of them is increasing fruiting efficiency (grains set per unit of spike dry weight at anthesis). Fruiting efficiency is the final outcome of the fate of floret development and differences in this trait within modern cultivars would be related to higher survival of floret primordia. Then there are two alternative physiological pathways to improve fruiting efficiency by allowing a normal development of most vulnerable floret primordia: an increased allocation of assimilates for the developing florets before anthesis, or reduced demand of the florets for maintaining their normal development. Both alternatives may be possible, and it might be critical to recognize which of them is the actual cause of differences in fruiting efficiency. When considering this trait in breeding we must be aware of potential trade‐offs and therefore it must be avoided that increases in fruiting efficiency be constitutively related to decreases in either spike dry weight at anthesis or grain weight. In this review we described fruiting efficiency and its physiological bases, analyzing genetic variation and considering potential drawbacks that must be taken into account to avoid increases in fruiting efficiency being compensated by other traits.

show abstract

“…The unique exception was the experiment conducted in Mexico by Garcia et al. () in which a nonsignificant positive relationship was found.…”

Section: Genetic Variation In Fruiting Efficiency Within Elite Germplasmmentioning

confidence: 92%

Section: Pathways To Increase Fruiting Efficiencymentioning

confidence: 98%

Section: Pathways To Increase Fruiting Efficiencymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

See 2 more Smart Citations

Fruiting efficiency: an alternative trait to further rise wheat yield

Slafer

Elía

Savin

et al. 2015

Food and Energy Security

Self Cite

124

107

View full text Add to dashboard Cite

show abstract

“…Fischer () initially defined the critical period for the effects of light interception on grain number determination as being from when the penultimate leaf had emerged until anthesis. The stem elongation phase has, however, also been defined as from DGS 31 to DGS 65 (García et al , ). In the Renesansa and Savannah population, grain yield was positively associated with light interception in the stem elongation phase up to around 275 MJ PAR m −2 (Fig.…”

Section: Avoidance and Tolerance Of Abiotic Stressesmentioning

confidence: 99%

Decimal growth stages for precision wheat production in changing environments?

Barber

Carney

Alghabari

et al. 2015

Annals of Applied Biology

View full text Add to dashboard Cite

The utility of the Decimal Growth Stage (DGS) scoring system for cereals is reviewed. The DGS is the most widely-used scale in academic and commercial applications due to its comprehensive coverage of cereal developmental stages, the ease of use and definition provided, and adoption by official agencies. The DGS has demonstrable and established value in helping to optimise the timing of agronomic inputs, particularly with regards to plant growth regulators, herbicides, fungicides and soluble nitrogen fertilizers. Additionally the DGS is used to help parametise crop models, and also in understanding the response and adaptation of crops to the environment. The value of the DGS for increasing precision relies on it indicating, to some degree, the various stages in the development of the stem apex and spike. Coincidence of specific growth stage scores with the transition of the apical meristem from a vegetative to a reproductive state, and also with the period of meiosis, is unreliable. Nonetheless, in pot experiments it is shown that the broad period of booting (DGS 41-49) appears adequate for covering the duration when the vulnerability of meiosis to drought and heat stress is exposed. Similarly, the duration of anthesis (61-69) is particularly susceptible to abiotic stresses: initially from a fertility perspective, but increasingly from a mean grain weight perspective as flowering progresses to DGS 69 and then milk development. These associations with DGS can have value at the crop level of organisation: for interpreting environmental effects, and in crop modelling. However, genetic, biochemical, and physiological analysis to develop greater understanding of stress acclimation during the vegetative state, and tolerance at meiosis, does require more precision than DGS can provide. Similarly, individual floret analysis is needed to further understand the genetic basis of stress tolerance during anthesis.publishersversionpreprintPeer reviewe

show abstract

Sunshine

2022

Wheat

View full text Add to dashboard Cite

Wheat grain number: Identification of favourable physiological traits in an elite doubled-haploid population

Cited by 46 publications

References 49 publications

Fruiting efficiency: an alternative trait to further rise wheat yield

Fruiting efficiency: an alternative trait to further rise wheat yield

Decimal growth stages for precision wheat production in changing environments?

Sunshine

Contact Info

Product

Resources

About