Combining high grain number and weight through a DH-population to improve grain yield potential of wheat in high-yielding environments

Bustos, Daniela; Hasan, Ahmed Khairul; Reynolds, M.P.; Calderini, Daniel F.

doi:10.1016/j.fcr.2013.01.015

Cited by 138 publications

(116 citation statements)

References 38 publications

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“…The climatic conditions and crop management practices allowed the genetic yield potential of both wheat and pea to be expressed in the highest P rate. This is in line with previous studies including these crops maintained free of biotic and abiotic stresses in the high yielding environment of southern Chile (wheat: Bustos et al, 2013;pea: Sandaña et al, 2009). For example, for the same cultivar Pandora-INIA, Bustos et al (2013), reported grain yield, accumulated intercepted photosynthetically active radiation (IPAR) and radiation use efficiency (RUE) equivalent to 11 Mg ha -1 , 878 MJ m -2 y 3.0 g MJ -1 , respectively.…”

Section: Discussionsupporting

confidence: 78%

“…This is in line with previous studies including these crops maintained free of biotic and abiotic stresses in the high yielding environment of southern Chile (wheat: Bustos et al, 2013;pea: Sandaña et al, 2009). For example, for the same cultivar Pandora-INIA, Bustos et al (2013), reported grain yield, accumulated intercepted photosynthetically active radiation (IPAR) and radiation use efficiency (RUE) equivalent to 11 Mg ha -1 , 878 MJ m -2 y 3.0 g MJ -1 , respectively. These values are similar to those reached in our study under the highest P rate (the IPAR and RUE were on averaged 833 MJ m -2 and 3.2 g MJ -1 , respectively).…”

Section: Discussionsupporting

confidence: 78%

“…This makes it difficult to extrapolate the sensitivity of these crops (in yield and PUE) to P deficiency under high yielding environments. In the agricultural systems of southern it is essential to make these types of comparison considering that i) wheat and pea can yield over 6 and 10 Mg ha -1 , respectively (wheat: Sandaña and Pinochet, 2011;Bustos et al, 2013;pea: Sandaña et al, 2009) and ii) high amounts of P fertilization are often required to reach these yields, since soils in this environment are volcanic soils (Andisols) with high P fixing capacities. Previously, Moll et al (1982) using N, defined nutrient use efficiency as grain yield per unit of nutrient supplied (from soil plus fertilizer).…”

Section: Introductionmentioning

confidence: 99%

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Grain yield and phosphorus use efficiency of wheat and pea in a high yielding environment

Sandaña

Pinochet

2014

J. Soil Sci. Plant Nutr.

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The aim of the present study was to evaluate the response of grain yield, phosphorus (P) use efficiency (PUE, g yield g -1 P available) and related root traits of wheat and pea to different P availabilities in a high yielding environment (e.g.: yield higher than 10 Mg ha -1 for wheat). Two experiments were conducted in southern Chile. Treatments consisted of the combination of (i) two crops (spring-bred wheat and pea) and (ii) three rates of P fertilization (0 (P0), 100 (P1) and 250 (P2) kg P ha -1 ). Grain yield of wheat was more sensitive to P deficiency than pea. Wheat showed consistently higher (P < 0.01) PUE than pea, averaging 195 and 125 g yield g -1 P available, respectively. This was principally ascribed to the highest (P < 0.01) P utilization efficiency of wheat (430 vs. 249 g yield g -1 P uptake for wheat and pea, respectively). On the contrary, the P uptake efficiency was slightly different for these crops (0.44 and 0.49 g P g -1 P available, respectively). However, these crops presented different strategies for P acquisition. Wheat had a higher (P < 0.01) soil exploratory capacity than pea, while pea showed a higher (P < 0.01) P uptake per unit of root length than wheat. Wheat showed higher PUE than pea; however, crop differences are ascribed to differences in phosphorus utilization rather than to phosphorus uptake efficiency. This information could contribute to optimized soil P use and improved crop fertilization management.

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Section: Discussionsupporting

confidence: 78%

Section: Discussionsupporting

confidence: 78%

Section: Introductionmentioning

confidence: 99%

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Grain yield and phosphorus use efficiency of wheat and pea in a high yielding environment

Sandaña

Pinochet

2014

J. Soil Sci. Plant Nutr.

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“…This effect was coupled with the increase in the number of seeds per spike. An increase in the values of this parameter to counterbalance the lower number of spikes m -2 is in accordance with previous studies on the effect of sowing density in wheat (Bustos et al, 2013;Li et al, 2016).…”

Section: Discussionsupporting

confidence: 77%

Grain yield and competitive ability against weeds in modern and heritage common wheat cultivars are differently influenced by sowing density

et al. 2017

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Sowing density can have a strong impact on crop stand development during wheat growing cycle. In organic and low-input agriculture, and therefore with minimum or nil use of chemical herbicides, increased sowing density is expected to affect not only grain yield but also weed suppression. In this study we tested, under Mediterranean conditions, six common wheat cultivars (three modern and three heritage) and two three-component mixtures (arranged by combining the three modern or the three heritage cultivars). The different crop stands were tested at sowing densities of 250 (low) and 400 (high, similar to standard sowing density used by local farmers) viable seeds m -2 for two growing seasons. We did not detect a significant effect of crop stand diversity (single cultivars vs mixtures) on grain yield and weed suppression. Differences were ascribed to type of cultivars used (heritage vs modern). Compared to high sowing density, in modern cultivars grain yield did not decrease significantly with low sowing density, whereas in heritage cultivars it increased by 15.6%, possibly also because of 21.5% lower plant lodging. Weed biomass increased with low sowing density both in heritage and modern cultivar crop stand types. However, heritage crop stands had, on average, a lower weed biomass (56%) than modern crop stands. Moreover, weed biomass in heritage crop stands at low density (6.82±1.50 g m -2 ) was lower than that of modern cultivars at the same sowing density (15.54±3.35 g m -2 ), confirming the higher suppressive potential of the former. We can conclude that lower sowing density can be advisable when using heritage crop stands as it keeps productivity while decreasing plant lodging and maintaining weeds under control.

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“…Wheat's harvest index have shown a progressive increase throughout the twentieth century. Moreover, the largest contribution to the increased yield potential of modern wheat varieties came from the increase in harvest index (Zhang et al 2012;Bustos et al 2013). Our results under conventional tillage ( Fig.…”

mentioning

confidence: 99%

Genotype × tillage interaction in a recurrent selection program in wheat

Maich¹,

Rienzo²

2014

Cereal Research Communications

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The objective of this study was to test if the response to 10 cycles of a recurrent selection program conducted under conventional tillage and rain fed conditions was the same when contrasted, for several traits, under conventional and non-tillage practices. During two season (2011 and 2012) the 44 S-derived families (four/C 0 to C 10 populations) were evaluated under conventional and non-tillage systems in two fields next to each other. Days to anthesis, plant height, grain, and biomass yield and 1000-grain weight were determined. The grain number per m 2 and harvest index was also estimated. From a random sample of 10 tillers the spikelet per spike and grains per spike were measured. For each trait, a linear mixed model (regression) was fitted to the experimental data. The slopes, under conventional tillage, were significant greater than zero for grain yield, harvest index, seeds per square meter, spikelet per spike and seeds per spike. Under non-tillage the list of traits showing slopes significantly greater than zero was shorter. For most traits there was a significant difference in the intercept terms between conventional tillage and non-tillage, which is interpreted as the tillage-practice effect. The concurrent evaluation in conventional and non-tillage soil managements of ten cycles of a recurrent selection program performed under conventional tillage confirmed the occurrence of a significant genetic progress only under conventional tillage.

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Combining high grain number and weight through a DH-population to improve grain yield potential of wheat in high-yielding environments

Cited by 138 publications

References 38 publications

Grain yield and phosphorus use efficiency of wheat and pea in a high yielding environment

Grain yield and phosphorus use efficiency of wheat and pea in a high yielding environment

Grain yield and competitive ability against weeds in modern and heritage common wheat cultivars are differently influenced by sowing density

Genotype × tillage interaction in a recurrent selection program in wheat

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