Flag leaf senescence, carbon content and carbon isotope discrimination in durum wheat grown under semi-arid conditions

2003 ◽  
Vol 31 (1-2) ◽  
pp. 161-168 ◽  
Author(s):  
M. Hafsi ◽  
W. H. Pfeiffer ◽  
P. Monneveux
Keyword(s):  
Carbon Content ◽  
Durum Wheat ◽  
Carbon Isotope ◽  
Leaf Senescence ◽  
Carbon Isotope Discrimination ◽  
Flag Leaf ◽  
Isotope Discrimination ◽  
Arid Conditions ◽  
Semi Arid

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.

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

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.

Sign in / Sign up

Export Citation Format

Share Document