Selection response for carbon isotope discrimination in a <i>Triticum polonicum</i>×<i>T. durum</i> cross: Potential interest for improvement of water efficiency in durum wheat

Hakimi, Amin Al; Monneveux, P.; Deléens, E.

doi:10.1111/j.1439-0523.1996.tb00926.x

Cited by 22 publications

(17 citation statements)

References 26 publications

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“…The significant negative associations between Δ and days to heading and days to anthesis observed in the present study, particularly under rainfed conditions, have also been reported by Al Hakimi et al. (1996).…”

Section: Discussionsupporting

confidence: 87%

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Relationship between Carbon Isotope Discrimination and Grain Yield in Spring Wheat under Different Water Regimes and under Saline Conditions in the Ningxia Province (North‐west China)

Xu¹,

Yuan²,

Li³

et al. 2007

J Agronomy Crop Science

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The relationship between grain yield and carbon isotope discrimination (Δ) was analysed in wheat grown under different water regimes in the Ningxia Province (north‐west of China). When the association was significant, the relationships between grain yield, Δ and other drought tolerance related traits, such as leaf ash content (ma), chlorophyll concentration (Chl), relative water content (RWC), stomatal conductance (gS) and the ratio of internal CO2 leaf concentration to ambient CO2 concentration (Ci/Ca), were also examined. Using correlation analysis, the relationships were determined during two consecutive years in a set of 20 spring wheat cultivars (landraces, improved varieties and advanced lines) under rainfed and irrigated conditions, including saline conditions. The relationship between Δ and yield within environments highly depended on the quantity of water stored in the soil at sowing, the quantity and distribution of rainfall during the growth cycle, and the irrigation before anthesis. Δ predicted grain yield under limited irrigation (post‐anthesis water stress) but not under pre‐anthesis water stress (rainfed conditions), fully irrigated and saline conditions. Under limited irrigation, grain Δ correlated significantly to grain yield leaf ma at heading and maturity. It also significantly positively correlated to Chl, RWC, gS and Ci/Ca assessed at anthesis. A precise characterization of the timing and intensity of the abiotic constraints experienced by the crop is consequently needed before implementing the use of Δ in wheat breeding programmes.

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Section: Discussionsupporting

confidence: 87%

“…Patterns in the relationship between grain yield and Δ can also be masked by phenological differences among genotypes that may affect yield and Δ. Under Mediterranean conditions for example, early genotypes generally show higher Δ values (Al Hakimi et al. 1996, Araus et al.…”

Section: Introductionmentioning

confidence: 99%

Relationship between Carbon Isotope Discrimination and Grain Yield in Spring Wheat under Different Water Regimes and under Saline Conditions in the Ningxia Province (North‐west China)

Xu¹,

Yuan²,

Li³

et al. 2007

J Agronomy Crop Science

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“…Einkorn wheat, (Triticum monococcum subsp. monococcum) was found previously to have a similar (Austin et al 1986) or even higher (Al Hakimi et al 1996) biomass, compared to bread wheat. Variation in grain yield was much more driven by differences in harvest index (r = 0.873***) than by differences in biomass production (r = 0.661**).…”

Section: Discussionmentioning

confidence: 74%

Carbon isotope discrimination and water use efficiency in Iranian diploid, tetraploid and hexaploid wheats grown under well-watered conditions

Khazaei

Mohammady

Zaharieva

et al. 2008

Genet Resour Crop Evol

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Carbon isotope discrimination (D) has been proposed as physiological criterion to select C 3 crops for yield and water use efficiency. The relationships between carbon isotope discrimination (D), water use efficiency for grain and biomass production (WUE G and WUE B , respectively) and plant and leaf traits were examined in 20 Iranian wheat genotypes including einkorn wheat (Triticum monococcum L. subsp. monococcum) accessions, durum wheat (T. turgidum L. subsp. durum (Desf.) Husn.) landraces and bread wheat (T. aestivum L. subsp. aestivum) landraces and improved cultivars, grown in pots under well-watered conditions. Carbon isotope discrimination was higher in diploid than in hexaploid and tetraploid wheats and was negatively associated with grain yield across species as well as within bread wheat. It was also positively correlated to stomatal frequency. The highest WUE G and grain yield were noted in bread wheat and the lowest in einkorn wheat. Einkorn and bread wheat had higher WUE B and biomass than durum wheat. WUE G and WUE B were significantly negatively associated to D across species as well as within bread and durum wheat. The variation for WUE G was mainly driven by the variation for harvest index across species and by the variation for D within species. The quantity of water extracted by the crop, that was closely correlated to root mass, poorly influenced WUE G . Environmental conditions and genetic variation for water use efficiency related traits appear to highly determine the relationships between WUE G and its different components (water consumed, transpiration efficiency and carbon partitioning).

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“…2001c). Moreover, high broad‐sense heritability values were reported for ΔG in several cereal species including durum wheat (Condon and Richards 1992, Al Hakimi et al. 1996, Merah et al.…”

Section: Discussionmentioning

confidence: 99%

Association between Yield and Carbon Isotope Discrimination Value in Different Organs of Durum Wheat Under Drought

Merah¹,

Deléens²,

Teulat³

et al. 2002

J Agronomy Crop Science

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Carbon isotope discrimination (Δ) has been proposed as a selection criterion for transpiration efficiency and grain yield in drought‐prone environments for several C3 species, including cereals. Δ analysis, however, has mainly been concerned with grain or culm tissues and little work has been devoted to other organs. The objective of this study was to describe Δ variation in different organs and to examine the relationships between Δ and grain yield across environments. Six durum wheat genotypes with contrasted grain Δ were cultivated under rainfed conditions during three successive years at Montpellier (South of France). Δ was measured on flag leaf, stalk, awns, chaff and rachis sampled at anthesis and maturity, and on mature grain. Higher genotypic variation and closer correlation with yield were noted for grain Δ compared to other plant parts. The genotype ranking across years was more consistent for grain Δ than for other organs. Consequently, the grain seems the most effective plant part for Δ analysis in durum wheat under Mediterranean conditions. The study of Δ variation in other organs may be useful, however, to evaluate the contribution of those organs to grain filling and final yield according to environmental conditions.

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Selection response for carbon isotope discrimination in a Triticum polonicum×T. durum cross: Potential interest for improvement of water efficiency in durum wheat

Cited by 22 publications

References 26 publications

Relationship between Carbon Isotope Discrimination and Grain Yield in Spring Wheat under Different Water Regimes and under Saline Conditions in the Ningxia Province (North‐west China)

Relationship between Carbon Isotope Discrimination and Grain Yield in Spring Wheat under Different Water Regimes and under Saline Conditions in the Ningxia Province (North‐west China)

Carbon isotope discrimination and water use efficiency in Iranian diploid, tetraploid and hexaploid wheats grown under well-watered conditions

Association between Yield and Carbon Isotope Discrimination Value in Different Organs of Durum Wheat Under Drought

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