Grain growth and development of old and modern Australian wheats

Loss, S. P.; Kirby, E. J. M.; Siddique, Kadambot H.M.; Perry, M. W.

doi:10.1016/0378-4290(89)90049-x

Cited by 95 publications

(54 citation statements)

References 18 publications

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“…This agrees with previous studies focused on the analysis of physiological determinants of grain weight when grain filling rate and grain filling duration were measured in thermal time units (e.g. Simmons et a!, 1982;Loss et al , 1989;Miralles and Slafer, 1995). In addition, grain filling rate was positively and significantly associated with carpel weight at anthesis in experiments I and 2 (see Calderini et al , 1999b;Calderini and Reynolds, 2000).…”

Section: Grain Wezght and Associated Traits Durzng The Post-anthesis mentioning

confidence: 87%

The Importance of the Period Immediately Preceding Anthesis for Grain Weight Determination in Wheat

Calderini¹,

Savin²,

Abeledo³

et al. 2001

Wheat in a Global Environment

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Although individual grain weight is an important source of variation for grain yield, there is still poor understanding of the causes determining final grain weight. Almost all studies conducted for understanding the determinants of grain weight have been focused on the post-anthesis period. However, there is important evidence that preanthesis conditions could also modify final grain weight. Three experiments including different sowing dates, genotypes and temperature regimes between booting and anthesis, were carried out in Argentina and Mexico to analyse the effect of temperature and associated traits during the pre-and post-anthesis periods on grain weight under field conditions. In these experiments final grain weight could not be explained by average or maximum temperature during the post-anthesis period. However, average temperature between booting and anthesis was closely related to the observed grain weight differences, probably as a consequence of the effects of this factor on carpel growth. Differences in grain weight between genotypes and grain position were successfully explained by differences in carpel weight at anthesis. These results suggest that our knowledge to determine grain weight could improve if the immediately preanthesis period conditions were taken into account.

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Section: Grain Wezght and Associated Traits Durzng The Post-anthesis mentioning

confidence: 87%

The Importance of the Period Immediately Preceding Anthesis for Grain Weight Determination in Wheat

Calderini¹,

Savin²,

Abeledo³

et al. 2001

Wheat in a Global Environment

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“…Recent studies in Western Australia Loss et al, 1989;Siddique et al, 1989a, b,c) have identified major changes in moving from the old variety, Purple Straw (released 1860) to the modern variety, Kulin (1986). Modern varieties, adapted to the growing environment of the Western Australian wheatbelt, differed from the old ones in developing faster, flowering earlier, forming less and more erect leaves and having a reduced phyllochron interval.…”

Section: Introductionmentioning

confidence: 99%

Root:shoot ratios of old and modern, tall and semi-dwarf wheats in a mediterranean environment

Siddique¹,

Belford²,

Tennant³

1990

Plant Soil

321

177

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A field study tested the hypothesis that modern wheat varieties invest a lesser proportion of the total dry matter (root plus shoot) in the root system compared to old varieties. The study was carried out on a duplex soil (sand over clay) at Merredin, Western Australia in a Mediterranean type environment. We also compared the root:shoot dry matter ratios of near-isogenic lines for Rht dwarfing genes.Root:shoot ratios decreased with crop growth stage and were closely related

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“…To estimate sustained grain growth rate (SGR), a linear regression was applied to data from the linear phase of grain growth as described previously (Loss et al 1989).…”

Section: Data Collectionmentioning

confidence: 99%

Truncation of grain filling in wheat (Triticum aestivum) triggered by brief heat stress during early grain filling: association with senescence responses and reductions in stem reserves

Shirdelmoghanloo

Cozzolino

Lohraseb

et al. 2016

Functional Plant Biol.

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Abstract. Short heat waves during grain filling can reduce grain size and consequently yield in wheat (Triticum aestivum L.). Grain weight responses to heat represent the net outcome of reduced photosynthesis, increased mobilisation of stem reserves (water-soluble carbohydrates, WSC) and accelerated senescence in the grain. To compare their relative roles in grain weight responses under heat, these characteristics were monitored in nine wheat genotypes subjected to a brief heat stress at early grain filling (37 C maximum for 3 days at 10 days after anthesis). Compared with the five tolerant varieties, the four susceptible varieties showed greater heat-triggered reductions in final grain weight, grain filling duration, flag leaf chla and chlb content, stem WSC and PSII functionality (F v /F m ). Despite the potential for reductions in sugar supply to the developing grains, there was little effect of heat on grain filling rate, suggesting that grain size effects of heat may have instead been driven by premature senescence in the grain. Extreme senescence responses potentially masked stem WSC contributions to grain weight stability. Based on these findings, limiting heat-triggered senescence in the grain may provide an appropriate focus for improving heat tolerance in wheat.

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Grain growth and development of old and modern Australian wheats

Cited by 95 publications

References 18 publications

The Importance of the Period Immediately Preceding Anthesis for Grain Weight Determination in Wheat

The Importance of the Period Immediately Preceding Anthesis for Grain Weight Determination in Wheat

Root:shoot ratios of old and modern, tall and semi-dwarf wheats in a mediterranean environment

Truncation of grain filling in wheat (Triticum aestivum) triggered by brief heat stress during early grain filling: association with senescence responses and reductions in stem reserves

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