Genetic progress in Argentine bread wheat varieties released between 1918 and 2011: Changes in physiological and numerical yield components

Valvo, Patricio Javier Lo; Miralles, Daniel J.; Serrago, Román A.

doi:10.1016/j.fcr.2017.08.014

Cited by 84 publications

(70 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Historical sets of wheat varieties have been assessed to estimate the progress of breeding efforts and quantify the impact of management practices (Brancourt-Humel et al, 2003;Acreche et al, 2008;Del Pozo et al, 2014;Lo Valvo et al, 2017;Flohr et al, 2018). In some cases, similar historical trends occurred in different regions (Austin et al, 1980;Cox et al, 1988;Slafer and Andrade, 1989;Sanchez-Garcia et al, 2013;Beche et al, 2014;Lo Valvo et al, 2017;Flohr et al, 2018). The greater yield improvement mid-century was a result of the introduction of the dwarfing genes, which allowed for less lodging (Evenson, 2003).…”

Section: Grain Yield N Removal and Grain Protein Concentrationmentioning

confidence: 99%

“…For instance, genetic gain greater than 0.5% yr -1 during the 1960s to 2000s period was reported in the U.S., Australia, and Chile (Fufa et al, 2005;Sadras and Lawson, 2011;Del Pozo et al, 2014). Meanwhile, the genetic gain in wheat decreased or was nonsignificant in recent years in Spain, Brazil, and Argentina (Acreche et al, 2008;Beche et al, 2014;Lo Valvo et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…Wheat yield gain is often associated with improved harvest index, kernels m -2 , kernels per head, reduced plant height, shoot biomass and kernel weight (Brancourt-Humel et al, 2003;Zhou et al, 2007;Fischer and Edmeades, 2010;Sadras and Lawson, 2011;Sanchez-Garcia et al, 2013;Beche et al, 2014;Wu et al, 2014;Aisawi et al, 2015;Lo Valvo et al, 2017). More recently, genetic gain in yield correlated with shoot biomass at maturity in some breeding programs (Donmez et al, 2001;Shearman et al, 2005;Xiao et al, 2012;Beche et al, 2014;Wu et al, 2014) and agronomic studies across different varieties (de Oliveira Silva et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Changes in the Phenotype of Winter Wheat Varieties Released Between 1920 and 2016 in Response to In-Furrow Fertilizer: Biomass Allocation, Yield, and Grain Protein Concentration

et al. 2020

View full text Add to dashboard Cite

Plant breeding has increased the yield of winter wheat (Triticum aestivum L.) over decades, and the rate of genetic gain has been faster under high fertility in some countries. However, this response is not universal, and limited information exists on the physiological traits underlying the interaction between varieties and fertilization. Thus, our objectives were to identify the key shifts in crop phenotype in response to selection for yield and quality, and to determine whether historical and modern winter wheat varieties respond differently to in-furrow fertilizer. Factorial field experiments combined eight winter wheat varieties released between 1920 and 2016, and two fertilizer practices [control versus 112 kg ha -1 in-furrow 12 -40-0-10-1 (N-P-K-S-Zn)] in four Kansas environments. Grain yield and grain N-removal increased nonlinearly with year of release, with greater increases between 1966 and 2000. In-furrow fertilizer increased yield by~300 kg ha -1 with no variety × fertility interaction. Grain protein concentration related negatively to yield, and the residuals of this relationship were unrelated to year of release. Yield increase was associated with changes in thermal time to critical growth stages, as modern varieties had shorter vegetative period and longer grain filling period. Yield gains also derived from more kernels m -2 resultant from more kernels head -1 . Historical varieties were taller, had thinner stems, and allocated more biomass to the stem than semidwarf varieties. Yield gains resulted from increases in harvest index and not in biomass accumulation at grain filling and maturity, as shoot biomass was similar among varieties. The allometric exponent (i.e., the slope between log of organ biomass and log of shoot biomass) for grain increased with, and for leaves was unrelated to, year of release. The ability of modern varieties to allocate more biomass to the kernels coupled to an early maturity increased grain yield and grain N-removal over time. However, increases in grain yield were greater than increases in grain N-removal, reducing grain protein concentration in modern varieties.

show abstract

Section: Grain Yield N Removal and Grain Protein Concentrationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Changes in the Phenotype of Winter Wheat Varieties Released Between 1920 and 2016 in Response to In-Furrow Fertilizer: Biomass Allocation, Yield, and Grain Protein Concentration

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Wheat crop genetic gains vary among producing regions. Previous comprehensive studies (with a large number of genotypes and sites) showed that there was an annual genetic gain of 0.8% in the United States between 1980 and 2010 (Graybosch et al, 2014), 1.29% in China from 1950 to 2015 (Qin et al, 2015), 1.17% in Argentina from 1940 to 1999 (Lo Valvo et al, 2018), and 0.88% in Spain for cultivars released between 1930 and 2000 (Sanchez‐Garcia et al, 2013). Morgounov et al (2010) also reported an annual genetic gain of 0.7% yr −1 over 100 yr of wheat genetic improvement in western Siberia, and Aisawi et al (2015) reported an annual genetic gain of 0.59% (30 kg ha −1 yr −1 ) after analyzing the data from International Maize and Wheat Improvement Center (CIMMYT) cultivars released between 1966 and 2009.…”

mentioning

confidence: 99%

“…In wheat, a trend towards the stagnation of genetic gains has been reported in several producing regions. Lo Valvo et al (2018) indicated that Argentine cultivars released after 1999 achieved a genetic gain of only 14 kg ha −1 yr −1 (0.18% yr −1 ). A genetic gain plateau was also observed by Graybosch and Peterson (2010), who reported that gains stagnated in the Great Plains region of the United States between 1984 and 2008.…”

mentioning

confidence: 99%

Genetic Gain Over 30 Years of Spring Wheat Breeding in Brazil

et al. 2019

View full text Add to dashboard Cite

Wheat (Triticum aestivum L.) is one of the most important crops in the world. Brazil is one of the largest importers of this cereal, and wheat breeding programs are attempting to increase productivity and reduce external dependence. The objectives of this study were to quantify the spring wheat genetic gain in Brazil between 1984 and 2014 using data from multienvironment trials, and to verify if the genetic gain stagnated after the 2000s. This study used a highly unbalanced dataset containing grain yield (GY) data from 187 spring wheat trials that were performed at 25 locations between 2002 and 2015. In total, 126 cultivars, released between 1985 and 2014, were evaluated over 14 crop seasons. The cultivar evaluation indicated that there was a genetic gain in GY of 33.9 kg ha−1 yr−1 (r2 = 0.53, P < 0.01), which represents an increase of 1.28% yr−1. The dataset showed a linear regression for the genetic gain and indicates that wheat genetic gain has not stagnated in Brazil after the 2000s.

show abstract

Photosynthetic organs contributions to grain yield genetic gains in Chilean winter wheat

2021

View full text Add to dashboard Cite

Investigating the key traits associated with genetic gains in grain yield (GY) is essential for developing winter wheat (Triticum aestivum L.) breeding strategies. The study objectives were: (a) quantifying the photosynthetic contribution of flag leaf and ear to the grain filling; (b) analyzing if their contributions are associated with the genetic gains in GY; and (c) analyzing their relationship with other agronomical and physiological traits. Thus, six winter wheat genotypes of different release years were grown under optimal conditions in a greenhouse trial during 2019. Grain yield increased by 126 kg h -1 yr -1 , with the harvest index's change being the key factor affecting these gains. Compared to the control treatment, ear shading decreased ear contribution to grain filling by 16.35%, while both flag leaf and awn removal increased contribution to grain filling by 4.46 and 5.90%, respectively. Ear photosynthetic contribution estimated by source manipulation treatments showed a significant increase with the release year (0.54% yr -1 ). Whole ear gas exchange measures correlated positively with GY, and both dark respiration and gross photosynthesis showed positive correlations with the release year. The main findings of the study were: (a) GY gains in Chile were mainly due to the increased harvest index (HI), while the aerial biomass (AB) did not play a significant role in these gains; (b) the increased ear size besides the terminal heat stress during the study highlighted the ear role as the primary photosynthetic contributor to grain filling; and (c) using source manipulation techniques as an indirect selection trait for high ear photosynthesis appeared to be promising.

show abstract

Genetic progress in Argentine bread wheat varieties released between 1918 and 2011: Changes in physiological and numerical yield components

Cited by 84 publications

References 29 publications

Changes in the Phenotype of Winter Wheat Varieties Released Between 1920 and 2016 in Response to In-Furrow Fertilizer: Biomass Allocation, Yield, and Grain Protein Concentration

Changes in the Phenotype of Winter Wheat Varieties Released Between 1920 and 2016 in Response to In-Furrow Fertilizer: Biomass Allocation, Yield, and Grain Protein Concentration

Genetic Gain Over 30 Years of Spring Wheat Breeding in Brazil

Photosynthetic organs contributions to grain yield genetic gains in Chilean winter wheat

Contact Info

Product

Resources

About