Post-green revolution genetic advance in durum wheat: The case of Spain

Chairi, Fadia; Vergara-Díaz, Omar; Vatter, Thomas; Aparicio, Nieves; Nieto‐Taladriz, M. T.; Kefauver, Shawn C.; Bort, J.; Serret, María Dolores; Araus, José Luís

doi:10.1016/j.fcr.2018.09.003

Cited by 51 publications

(58 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This is higher than the findings for spring bread wheat (43.5 kg ha −1 per year or 0.51% per year) for a similar period and in the same Mediterranean environment [8]. It is also clearly higher than the increase reported for durum wheat in Spain (24 kg ha −1 y −1 ; 0.44% y −1 ) from 1980 to 2003, with no clear additional improvements occurring thereafter [26]. In northwest Mexico, under fully irrigated conditions, the genetic progress of spring durum and bread wheat varieties developed by CIMMYT was 0.49% and 0.41% per year, respectively, between 1966 and 2003 [27], and 0.88% per year when comparing eight bread wheat cultivars released between 1962 and 1988 [28].…”

Section: Agronomic Traitscontrasting

confidence: 60%

“…The yield potential achieved in Chile is clearly higher than values recorded in the Mediterranean basin. For example, high-yielding conditions in Spain usually do not surpass 8 Mg ha −1 [25,26], which is clearly lower than those achieved in the Mediterranean conditions of Chile. The high-yielding conditions in Spain usually imply several irrigations per season, particularly during the critical period from stem elongation to the middle grain filling, which alongside natural rainfall aims to balance the water lost due to accumulated evapotranspiration.…”

Section: Agronomic Traitsmentioning

confidence: 80%

See 1 more Smart Citation

Genetic Advance of Durum Wheat Under High Yielding Conditions: The Case of Chile

et al. 2019

Self Cite

View full text Add to dashboard Cite

In Chile, durum wheat is cultivated in high-yielding Mediterranean environments, therefore breeding programs have selected cultivars with high yield potential in addition to grain quality. The genetic progress in grain yield (GY) between 1964 and 2010 was 72.8 kg ha−1 per year. GY showed a positive and significant correlation with days to heading, kernels per unit ground area and thousand kernel weight. The gluten and protein content tended to decrease with the year of cultivar release. The correlation between the δ13C of kernels and GY was negative and significant (−0.62, p < 0.05, for all cultivars; and −0.97, p < 0.001, excluding the two oldest cultivars). The yield progress (genetic plus agronomic improvements) of a set of 40–46 advanced lines evaluated between 2006 and 2015 was 569 kg ha−1 per year. Unlike other Mediterranean agro-environments, a longer growing cycle together with taller plants seems to be related to the increase in the GY of Chilean durum wheat during recent decades.

show abstract

Section: Agronomic Traitscontrasting

confidence: 60%

Section: Agronomic Traitsmentioning

confidence: 80%

Genetic Advance of Durum Wheat Under High Yielding Conditions: The Case of Chile

et al. 2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…Although far less common, analyses of short-term breeding effects (Chairi et al, 2018) are also done for this reason. Cultivars of the current study were released in the US southern Great Plains from 2007 to 2016.…”

Section: Relevance Of Yield Determining Traits In the Response Of Whementioning

confidence: 99%

“…Conclusions derived from some studies considering in particular the most recent yield gains from long-term breeding gains (e.g., Acreche et al, 2008;Flohr et al, 2018;Lo Valvo et al, 2018;M. Sanchez-Garcia et al, 2012) or from studies exclusively focused in the recent past (e.g., Chairi et al, 2018) indicate that recent gains in yield have been much lower than in previous decades and in some cases rather marginal or inexistent.…”

Section: Relevance Of Yield Determining Traits In the Response Of Whementioning

confidence: 99%

Physiological Basis of Genotypic Response to Management in Dryland Wheat

et al. 2020

View full text Add to dashboard Cite

A great majority of dryland wheat producers are reluctant to intensify management due to the assumption that lack of water availability is the most critical factor limiting yield and thus, the response to management intensification would be limited. We conducted onfarm field experiments across three locations and two growing seasons in Kansas using 21 modern winter wheat genotypes grown under either standard (SM) or intensified management (IM) systems. The goals of this study were to (i) determine whether the SM adopted is adequate to reach achievable yields by farmers in the region and (ii) identify differences in responsiveness to IM among a range of modern genotypes. Across all sitesyears and genotypes, the IM increased yield by 0.9 Mg ha-1 , outyielding the SM system even in the lowest yielding conditions. As expected, the yield response to IM increased with the achievable yield of the environment and genotype. Across all sources of variation, the yield responsiveness to IM was related to increased biomass rather than harvest index, strongly driven by improvements in grain number (and independent of changes in grain weight), and by improvements in N uptake which resulted from greater biomass and shoot N concentration. The IM system generally also increased grain N concentration and decreased the grain N dilution effect from increased yield. Genotypes varied in their response to IM, with major response patterns resulting from the combination of response magnitude (large vs. small) and consistency (variable vs. consistent). Genotypes with high mean response and high variability in the response to IM across years could offer greater opportunities for producers to maximize yield as those genotypes showed greater yield gain from IM when conditions favored their response. For the background conditions evaluated, intensifying management could improve wheat yield in between c. 0.2 and 1.5 Mg ha-1 depending on genotype.

show abstract

“…Since the Green Revolution, the introduction of dwarfing genes has reduced plant heights and increased lodging resistance, both of which have played a significant role in increasing wheat yields [22,28,32,40,41]. Our results showed that plant height decreased with year of release; indeed, the length of five internodes decreased significantly with year of release, which contributed to the decline in plant height.…”

Section: Plant Height and Internode Lengthmentioning

confidence: 60%

Contribution of Proximal and Distal Grains Within Spikelets in Relation to Yield and Yield Components in the Winter Wheat Production Region of China From 1948 to 2012

et al. 2019

View full text Add to dashboard Cite

Grain number and weight within a spikelet are major yield components which determine the grain yield in wheat. The objective of this study was to explore genetic gains in grain performance within wheat spikelets at the individual grain level and its effect on grain yield and evaluate genetic progress in stem internode length and other yield-related traits. We conducted field experiments across three growing seasons in the western Yellow and Huai Valley of China; incorporating 17 bread wheat cultivars released from 1948 to 2012. Yields were significantly correlated with year of release. Yield gains equated to 3.95 g m−2 yr−1 in response to increases in total grain weight per m2 (GW) in proximal (G1 and G2) and distal (G3 and G4) grains, despite a decline in the proportional contribution of proximal grains to yield and increase in the proportional contribution of distal grains to yield with year of release. Grain number per m2 (GN), thousand-grain weight (TGW), and harvest index (HI) increased with year of release, but plant height decreased. Both grain number per spikelet of proximal and distal grain contributed to the increase in total GN. However, the contribution ratio of GN in proximal grains to total GN declined, and the proportion in distal grains increased. Average single grain weight (SGW) increased linearly at G1, G2, G3, and G4 with year of release and contributed to the increase in TGW. The G3 and G4 grain positions had much lower individual grain weights but increased at a faster rate than G1 and G2. At G1, G2, and G3 grain positions, from bottom to top spikelets, the newly released cultivars had the heaviest grains and the old cultivars had the lightest grains. New cultivars had more spikelets than old cultivars and the number of grains (proximal and distal grains) in the apical spike increased with year of release. The length of five internodes decreased significantly with year of release, more so in the upper than lower internodes, all of which contributed to the decline in plant height. In summary, increasing the number and weight of distal grains could increase grain yield, TGW, and GN.

show abstract

Post-green revolution genetic advance in durum wheat: The case of Spain

Cited by 51 publications

References 43 publications

Genetic Advance of Durum Wheat Under High Yielding Conditions: The Case of Chile

Genetic Advance of Durum Wheat Under High Yielding Conditions: The Case of Chile

Physiological Basis of Genotypic Response to Management in Dryland Wheat

Contribution of Proximal and Distal Grains Within Spikelets in Relation to Yield and Yield Components in the Winter Wheat Production Region of China From 1948 to 2012

Contact Info

Product

Resources

About