Relationships between carbon isotope discrimination and leaf morphophysiological traits in spring-planted spring wheat under drought and salinity stress in Northern China

2008 ◽  
Vol 59 (10) ◽  
pp. 941 ◽  
Author(s):  
Lin Zhu ◽  
Zong Suo Liang ◽  
Xing Xu ◽  
Shu Hua Li ◽  
Ji Hai Jing ◽  
...  
Keyword(s):  
Grain Yield ◽  
Carbon Isotope ◽  
Harvest Index ◽  
Carbon Isotope Discrimination ◽  
Water Status ◽  
Flag Leaf ◽  
Wheat Yield ◽  
Gas Exchange Parameters ◽  
Isotope Discrimination ◽  
North East

The relationships between carbon isotope discrimination (Δ) and some morphophysiological traits such as specific leaf dry weight (SLDW), gas exchange parameters, and relative water content (RWC) were studied in a collection of 20 bread wheat cultivars (landraces, released cultivars and advanced lines) in three locations of the Ningxia region (North-East China), i.e. Yinchuan (limited irrigation conditions), Huinong (limited irrigation conditions + salinity) and Guyuan (rain-fed conditions). Relationships between Δ, grain yield (GY), and harvest index (HI) and above-ground biomass (AGB) were also analysed. Differences in the measured traits between different locations were highly related to the variation in water availability. Positive correlations were noted between Δ and HI and grain yield. Flag leaf Δ was positively correlated with RWC at anthesis, and negatively associated with SLDW at grain filling. Significant and negative correlations between Δ and dry matter weight per plant at anthesis and biomass at maturity were noted. Leaf temperature (LT) was found to be negatively correlated with Δ and gs. The findings suggest that Δ may be a useful indicator reflecting wheat yield, harvest index, and water status under irrigation and rain-fed conditions in the Ningxia region.

Relationships between ash content, carbon isotope discrimination and yield in durum wheat

1998 ◽  
Vol 25 (7) ◽  
pp. 835 ◽  
Author(s):  
J.L. Araus ◽  
T. Amaro ◽  
J. Casadesús ◽  
A. Asbati ◽  
M.M. Nachit
Keyword(s):  
Grain Yield ◽  
Durum Wheat ◽  
Carbon Isotope ◽  
Carbon Isotope Discrimination ◽  
Flag Leaf ◽  
Dry Mass ◽  
Ash Content ◽  
The Other ◽  
Isotope Discrimination ◽  
Mass Basis

The relationships between ash content, carbon isotope discrimination and yield were studied in durum wheat (Triticum durum Desf.) grown in a Mediterranean region (north-western Syria) under three different water regimes (hereafter referred to as environments). Ash content (on dry mass basis) was measured in the flag leaf about 3 weeks after anthesis (leaf ash) and in mature kernels (kernel ash), whereas Δ was analysed in the penultimate leaf at heading (leaf Δ) and in mature kernels (kernel Δ). Leaf Δ was weakly or not related with the other parameters. Leaf ash correlated positively with kernel Δ (P≤0.001), even in the driest environment, which gave a mean yield of 1.5 t ha-1. For the four parameters, correlations with yield remained significant (P≤0.001) after correcting for days to heading. All the parameters showed a higher broad-sense heritability than yield. The parameter that showed the best genetic correlation with grain yield was kernel ash (r2= 0.88), followed by kernel Δ (r2 = 0.69) and leaf ash (r2 = 0.64), whereas leaf Δ (r2 = 0.26) was the least correlated parameter. Except for kernel ash, these parameters always correlated positively with grain yield. The negative relationships of kernel ash (on dry mass basis) with yield and all the other parameters may be attributable to the finding that kernel ash was higher in those genotypes more affected by drought during grain filling. Thus, kernel ash was negatively related (P≤0.001) with total kernel mass per spike. Prediction of grain yield through multiple linear regression suggests that kernel ash can be used as complementary criterion to either kernel Δ or leaf ash.

scholarly journals Variation in carbon isotope discrimination and its relationship with harvest index in the reference collection of chickpea germplasm

2013 ◽  
Vol 40 (12) ◽  
pp. 1350 ◽  
Author(s):  
Lakshmanan Krishnamurthy ◽  
Junichi Kashiwagi ◽  
Satoshi Tobita ◽  
Osamu Ito ◽  
Hari D. Upadhyaya ◽  
...  
Keyword(s):  
Drought Stress ◽  
Grain Yield ◽  
Carbon Isotope ◽  
Harvest Index ◽  
Carbon Isotope Discrimination ◽  
Positive Association ◽  
Shoot Biomass ◽  
Isotope Discrimination ◽  
Terminal Drought ◽  
Reference Collection

Terminal drought is a major constraint to chickpea productivity. Carbon isotope discrimination (Δ13C), an integrator of plant behaviour influencing transpiration efficiency (TE), is an important component of yield under drought. The variation in Δ13C and its association with yield was assessed in the reference collection of chickpea germplasm. Drought stress reduced shoot biomass by 36–39% and grain yield by 23%. Mean Δ13C was low and the range of genetic variation was high under drought stress. Largely, high Δ13C accessions were early in flowering (40–50 days), moderate in shoot biomass, high in seed yields and high in harvest index (HI). Δ13C was positively correlated with seed yield in both the years under drought stress, only in 2008–09 under optimal irrigation. This positive association was very close with HI. Among the yield components, Δ13C was closely associated with pod numbers per unit area and seed size under drought stress. Path coefficients showed no direct association of Δ13C with grain yield but an indirect negative association through shoot biomass at maturity and a close positive association through HI. The closest association of HI or shoot biomass was seen in the maturity group of accessions that experienced the optimum terminal drought stress.

Carbon isotope discrimination of two-rowed and six-rowed barley genotypes under irrigated and non-irrigated field conditions

2006 ◽  
Vol 86 (2) ◽  
pp. 433-441 ◽  
Author(s):  
Qingzhen Jiang, Dominique Roche ◽  
David J. Hole
Keyword(s):  
Water Stress ◽  
Grain Yield ◽  
Carbon Isotope ◽  
Field Experiments ◽  
Carbon Isotope Discrimination ◽  
Flag Leaf ◽  
Heading Date ◽  
Hordeum Vulgare L ◽  
Isotope Discrimination ◽  
Yield Parameters

Carbon isotope discrimination (Δ) has been widely used to estimate the water-use efficiency (WUE) of C3 cereals including barley (Hordeum vulgare L.). Genetic lines of barley belong to two phenotypic classes for ear morphology, either two-rowed or six-rowed, a simply inherited trait. We tested the value of Δ as a predictor of grain yield and WUE for these two types of barley under different conditions of water availability. We also investigated if differences in plant morphology and yield parameters between these two types resulted in different carbon dynamics and different Δ values for grain, awn and flag leaf. We conducted field experiments for 3 consecutive years with genetic lines of both ear types in northern Utah and southeastern Idaho under irrigated and non-irrigated conditions, including two line-source sprinkler experiments. Correlations between grain yield and Δ values of flag leaf, awn and grain were stronger in combined analyses across ear types than in analyses within two-rowed (2R) and six-rowed (6R) types. Nevertheless, we found that Δ of mature awns and grains were a good predictor of yield for both barley types under low to moderate water stress. However, Δ was not a reliable predictor for barley yield under severe water stress. Pearson’s correlations were used to test associations between Δ values and several yield parameters (heading date, above-ground dry matter, harvest index, grain mass per fertile tiller). Our data indicated that among the field-grown genetic lines tested, the two types of barley differed in Δ values for grain, awn and flag leaf. Values of Δ for 2R barley were usually lower, suggesting higher WUE, than those for 6R types. Fundamental differences in sink size or grain mass per fertile tiller between 2R and 6R cultivars probably have important consequences on carbon/water metabolism at the whole tiller level. Key words: Barley, carbon isotope discrimination, yield, awn, drought, irrigation

Relationship of grain yield with carbon isotope discrimination and ash content in lines derived from a bread wheat cultivar

2005 ◽  
Vol 143 (4) ◽  
pp. 275-282 ◽  
Author(s):  
J. T. TSIALTAS ◽  
I. S. TOKATLIDIS ◽  
E. TAMOUTSIDIS ◽  
I. XYNIAS
Keyword(s):  
Grain Yield ◽  
Carbon Isotope ◽  
Bread Wheat ◽  
Carbon Isotope Discrimination ◽  
Selection Criterion ◽  
Ash Content ◽  
Individual Plant ◽  
Low Density ◽  
Isotope Discrimination ◽  
Relationship Of

The objective was to explore, in lines derived from a bread wheat (Triticum aestivum L.) cultivar, the association of grain yield with carbon isotope discrimination (Δ) and ash content (Ash) determined in both flag leaf and kernel. Divergent selection within the cv. Nestos, based on individual plant yield under very low density (11547 plants/ha), produced 20 lines. Progeny evaluation was conducted in two sites of Northern Hellas (Greece) at both low (11547 plants/ha) and high (5000000 plants/ha) density. The results showed significant differences between lines for grain yield, Δ and Ash. However, only the conclusions on grain yield were similar in low and high density, perhaps because the selection criterion under low density was grain yield. This, combined with the lack of any strong relationship of grain yield with either Δ or Ash, failed to confirm the usefulness of these physiological traits as indirect selection criteria, when the within-cultivar variation for grain yield is exploited. The possible association of grain yield with Δ and Ash appeared to be influenced by various factors such as drought, level of grain yield and altitude. Results also showed that less plant-to-plant variability, as expressed by the coefficients of variation (CV) of single-plant yields, was associated with decreased drought response and higher yield stability. The less stressed lines were those that used water more conservatively till anthesis and maintained a high photosynthetic rate during grain filling.

Carbon Isotope Discrimination as a Surrogate of Grain Yield in Drought Stressed Triticale

2017 ◽  
pp. 603-615 ◽  
Author(s):  
Lawrence Munjonji ◽  
Kingsley Kwabena Ayisi ◽  
Bram Vandewalle ◽  
Geert Haesaert ◽  
Pascal Boeckx
Keyword(s):  
Grain Yield ◽  
Carbon Isotope ◽  
Carbon Isotope Discrimination ◽  
Isotope Discrimination

Stability of Carbon Isotope Discrimination and Grain Yield in Durum Wheat

Crop Science ◽  
2001 ◽  
Vol 41 (3) ◽  
pp. 677-681 ◽  
Author(s):  
O. Merah ◽  
E. Deléens ◽  
I. Souyris ◽  
M. Nachit ◽  
P. Monneveux
Keyword(s):  
Grain Yield ◽  
Durum Wheat ◽  
Carbon Isotope ◽  
Carbon Isotope Discrimination ◽  
Isotope Discrimination

scholarly journals Ash content might predict carbon isotope discrimination and grain yield in durum wheat

2001 ◽  
Vol 149 (2) ◽  
pp. 275-282 ◽  
Author(s):  
Othmane Merah ◽  
Eliane Deléens ◽  
Irenée Souyris ◽  
Philippe Monneveux
Keyword(s):  
Grain Yield ◽  
Durum Wheat ◽  
Carbon Isotope ◽  
Carbon Isotope Discrimination ◽  
Ash Content ◽  
Isotope Discrimination
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