Breeding Opportunities for Increasing the Efficiency of Water Use and Crop Yield in Temperate Cereals

Richards, R. A.; Rebetzke, G. J.; Condon, Anthony G.; Herwaarden, A. F. van

doi:10.2135/cropsci2002.0111

Cited by 316 publications

(236 citation statements)

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“…Water-use efficiency (WUE) has been proposed as a criterion for yield improvement under drought Condon et al 2002;Rebetzke et al 2002;Richards et al 2002), and improved WUE can increase yield in certain environments. However, the application of WUE in breeding programs has been largely limited by the time-consuming and expensive screening process under field conditions for large populations.…”

Section: Introductionmentioning

confidence: 99%

Quantitative trait loci for water-use efficiency in barley (Hordeum vulgare L.) measured by carbon isotope discrimination under rain-fed conditions on the Canadian Prairies

2012

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Barley (Hordeum vulgare L.) yield is commonly limited by low rainfall and high temperature during the growing season on the Canadian Prairies. Empirical knowledge suggests that carbon isotope discrimination (Δ(13)C), through its negative relationship with water-use efficiency (WUE), is a good index for selecting stable yielding crops in some rain-fed environments. Identification of quantitative trait loci (QTL) and linked markers for Δ(13)C will enhance its use efficiency in breeding programs. In the present study, two barley populations (W89001002003 × I60049 or W × I, six-row type, and Merit × H93174006 or M × H, two-row type), containing 200 and 127 recombinant inbred lines (RILs), were phenotyped for leaf Δ(13)C and agronomic traits under rain-fed environments in Alberta, Canada. A transgressive segregation pattern for leaf Δ(13)C was observed among RILs. The broad-sense heritability (H (2)) of leaf Δ(13)C was 0.8, and there was no significant interaction between genotype and environment for leaf Δ(13)C in the W × I RILs. A total of 12 QTL for leaf Δ(13)C were detected in the W × I RILs and 5 QTL in the M × H RILs. For the W × I RILs, a major QTL located on chromosome 3H near marker Bmag606 (9.3, 9.4 and 10.7 cM interval) was identified. This major QTL overlapped with several agronomic traits, with W89001002003 alleles favoring lower leaf Δ(13)C, increased plant height, and reduced leaf area index, grain yield, harvest index and days to maturity at this locus or loci. This major QTL and its associated marker, when validated, maybe useful in breeding programs aimed at improving WUE and yield stability of barley on the Canadian Prairies.

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Section: Introductionmentioning

confidence: 99%

Quantitative trait loci for water-use efficiency in barley (Hordeum vulgare L.) measured by carbon isotope discrimination under rain-fed conditions on the Canadian Prairies

2012

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“…In attempts to achieve this, the physiological and morphological characteristics of crop plants should be taken into account (González et al 2008;Haussmann et al 1998;Malik et al 1999;Richards et al 2002;Reynolds et al 2002).…”

Section: Introductionmentioning

confidence: 99%

Effect of terminal water stress on leaf epicuticular wax load, residual transpiration and grain yield in barley

González¹,

Ayerbe²

2009

Euphytica

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The effect of drought on barley leaf epicuticular wax load (EWL), residual transpiration rates (RTR) and grain yield was examined by subjecting 12 barley genotypes to controlled irrigation and terminal water stress conditions. The mean leaf epicuticular wax load was found to be 9% greater in the plants subjected to terminal water stress than in those provided irrigation, while the mean residual transpiration rate of the irrigated plants was 20% higher than in those subjected to water stress. Under these stress conditions, the correlation between grain yield and the epicuticular wax load was positive (P \ 0.01), while that between the grain yield and the residual transpiration rate was negative (P \ 0.05). Under the water stress conditions, the breeding lines studied showed a greater mean epicuticular wax load than the commercial varieties, while the residual transpiration rate was greater in these varieties than in the breeding lines. The greater epicuticular wax load of the breeding lines favoured their tolerance of drought, improving their yields over those of the commercial varieties.

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“…A high, significant negative correlation was estimated between WC and DW in the control (r = −54) and drought stress treatment (r = −60) (Table 3). High DW is an indicator for large plants transpiring more water than smaller plants because transpiration depends to a large extent on leaf area [48]. Water content in the leaves also depends on osmolality because the more solutes are accumulated in the leaves, the more water will be absorbed and retained [28].…”

Section: Discussionmentioning

confidence: 99%

QTL for Water Use Related Traits in Juvenile Barley

2016

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Water use efficiency (WUE) is a trait of prime interest in cases of drought stress because it provides information on biomass production in limited water conditions. In order to get information on WUE and additional water use related traits, i.e., dry weight (DW), fresh weight (FW), total leaf water (LW) and leaf water content (WC), greenhouse pot experiments were conducted on 156 barley genotypes (Hordeum vulgare L.) for control (70% maximal water capacity of soil) and drought stress conditions (20% of the maximal water capacity of soil). Significant correlations between WUE and the other water use related traits (r ≤ 0.65) were determined in juvenile barley, and genotypes suited for improving drought stress tolerance in early developmental stages were identified. Furthermore, based on the significant effects of genotypes and treatments, as well as their interaction, data were used for genome wide association studies (GWAS) resulting in the identification of 14 marker trait associations (MTAs) corresponding to four quantitative trait loci (QTL). For WUE, four MTAs were detected mostly located on barley chromosome 4H. For four MTAs, functional annotations related to the involvement in response to abiotic stress were found. These markers may be of special interest for breeding purposes in cases when they will be validated and also detected in later growth stages.

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Breeding Opportunities for Increasing the Efficiency of Water Use and Crop Yield in Temperate Cereals

Cited by 316 publications

References 0 publications

Quantitative trait loci for water-use efficiency in barley (Hordeum vulgare L.) measured by carbon isotope discrimination under rain-fed conditions on the Canadian Prairies

Quantitative trait loci for water-use efficiency in barley (Hordeum vulgare L.) measured by carbon isotope discrimination under rain-fed conditions on the Canadian Prairies

Effect of terminal water stress on leaf epicuticular wax load, residual transpiration and grain yield in barley

QTL for Water Use Related Traits in Juvenile Barley

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