Source—sink relationships and grain mass at different positions within the spike in wheat

Slafer, Gustavo A.; Savin, Roxana

doi:10.1016/0378-4290(94)90080-9

Cited by 205 publications

(143 citation statements)

References 41 publications

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“…Balancing biomass (source) with yield components (sink) through breeding While a number of studies have suggested that yield and radiation use efficiency can be increased by improving source and sink balance (Slafer and Savin 1994;Reynolds et al 2012), this is the first time the hypothesis has been tested in a realistic breeding context. Results indicate that selecting parents with high expression of biomass (source) and crossing to sources with good expression of sink traits (HI, KNO, TKW etc.)…”

Section: Discussionmentioning

confidence: 99%

Strategic crossing of biomass and harvest index—source and sink—achieves genetic gains in wheat

et al. 2017

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Section: Discussionmentioning

confidence: 99%

Strategic crossing of biomass and harvest index—source and sink—achieves genetic gains in wheat

et al. 2017

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“…Grain growth could be considered as controlled by either the supply of photo-assimilates (source limitation) or the capacity of the grains to accumulate available carbohydrates (sink limitation). Numerous experiments have been reported in which the supply of assimilate per grain was modified, suggesting a sink limitation for both, wheat and barley, and sometimes a co-limitation in wheat (Slafer and Savin, 1994;Miralles and Slafer, 1995;Dreccer et al, 1997;Kruk et al, 1997;Bingham et al, 2007a;Serrago et al, 2011). However, under relatively dry environments, grain filling appears to be under stronger sink limitation in barley than in wheat (Josephides, 1993;López-Castañeda and Richards, 1994).…”

Section: Introductionmentioning

confidence: 99%

Comparative behavior of wheat and barley associated with field release and grain weight determination

Prado

Gallardo

Serrago

et al. 2013

Field Crops Research

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a b s t r a c t Double-cropping using the wheat-soybean sequence is a common practice in Argentina to promote the intensification of crops within rotations. However, the late release of the fields by a delayed harvest time in wheat determines soybean yield penalizations. In this context, barley could represent a better option than wheat preceding soybean in the crop rotation since there is some evidence that finishes its cycle earlier than wheat. However, it is not clear which period of barley shortens crop cycle allowing an earlier field release than wheat. The objectives of this study were to compare wheat and barley in terms of (i) field release and (ii) grain weight determination through the analysis of their physiological mechanisms. Field experiments during two consecutive growing seasons testing five different environments (three sowing dates in 2007 and two in 2008) were carried out to analyze the duration of different ontogenic periods and the attributes (dry matter and water dynamics) determining grain weight during the grainfilling period in wheat and barley. Early flowering time was the main cause of the early field release by barley as the grain filling and drying period were similar in both species. A strong relationship was found between dry matter and water dynamics in both species. Barley reached a higher maximum water content than wheat and also achieved physiological maturity with higher moisture concentration than wheat (48% and 39%, respectively). Barley showed a slight increase in grain weight, respect to wheat, due to a source:sink ratio enhancement (4% and 9% for wheat and barley, respectively). These data show an opposite response to that of Mediterranean, Australian and UK environments, where barley was under stronger sink limitation than wheat during the grain-filling period.

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“…Inter-and intracultivar source-sink variation with high yielding wheat genotypes has been reviewed by Slafer & Savin (1994) and by Reynolds et al (2007). Previous studies have indicated a significant morphological variation in leaf angle, leaf weight and leaf area duration between wheat genotypes (Austin et al 1980).…”

Section: Source-sink Variation and Adaptation Between Ideotypesmentioning

confidence: 99%

“…Theoretically, there are ca. 160 grain primordiums in the wheat ear (Slafer and Savin 1994). According to Peltonen-Sainio et al (2005) there is a critical cereal flowering period ("window of opportunity for yield") in Finnish long-day growing conditions, which defines the critical yield component grains/ear number.…”

Section: Optimum Vegetation and Yield Components For High Yielding Whmentioning

confidence: 99%

A comparative ideotype, yield component and cultivation value analysis for spring wheat adaptation in Finland

Laurila¹,

Mäkelä²,

Kleemola³

et al. 2012

AFSci

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In this study Mixed structural covariance, Path and Cultivation Value analyses and the CERES-Wheat crop model were used to evaluate vegetation and yield component variation affecting yield potential between different highlatitude (> 60° N lat.) and mid-European (< 60° N lat.) spring wheat (Triticum aestivum L.) genotypes currently cultivated in southern Finland. Path modeling results from this study suggest that especially grains/ear, harvest index (HI) and maximum 1000 kernel weight were significant factors defining the highest yield potential. Mixed and Cultivation value modeling results suggest that when compared with genotypes introduced for cultivation before 1990s, modern spring wheat genotypes have a significantly higher yielding capacity, current high yielding midEuropean genotypes even exceeding the 5 t ha -1 non-potential baseline yield level (y b ). Because of a forthcoming climate change, the new high yielding wheat genotypes have to adapt for elevated temperatures and atmospheric CO 2 growing conditions in northern latitudes. The optimized ideotype profiles derived from the generic high-latitude and mid-European genotypes are presented in the results. High-latitude and mid-European ideotype profiles with factors estimating the effects of concurrent elevated CO 2 and temperature levels with photoperiodical daylength effects can be utilized when designing future high yielding ideotypes adapted to future growing conditions. The CERES-Wheat ideotype modeling results imply, that with new high yielding mid-European ideotypes, the non-potential baseline yield (y b ) would be on average 5150 kg ha -1 level (+ 108 %) vs. new high-latitude ideotypes (y b 4770 kg ha -1 , 100%) grown under the elevated CO 2(700ppm) ×temperature (+3°C) growing conditions projected by the year 2100 climate change scenario in southern Finland.

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Source—sink relationships and grain mass at different positions within the spike in wheat

Cited by 205 publications

References 41 publications

Strategic crossing of biomass and harvest index—source and sink—achieves genetic gains in wheat

Strategic crossing of biomass and harvest index—source and sink—achieves genetic gains in wheat

Comparative behavior of wheat and barley associated with field release and grain weight determination

A comparative ideotype, yield component and cultivation value analysis for spring wheat adaptation in Finland

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