Yield Stability of Hybrid vs. Pureline Hard Winter Wheats in Regional Performance Trials

Peterson, C. J.; Moffatt, J. M.; Erickson, John R.

doi:10.2135/cropsci1997.0011183x003700010019x

Cited by 27 publications

(15 citation statements)

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“…First, as noted by Reitz and Salmon (1959), breeders in the region developed wheats with maturities proper for their respective latitudes. Hybrid wheat was suggested and tried as a possible means of genetically enhancing grain yield (Peterson et al, 1997;Koemel et al, 2004), but economic factors prevented the technology from ever impacting wheat production and breeding in the Great Plains. The second leap forward was the introduction of stem rust (Puccinia graminis Pers.:Pers.…”

Section: Resultsmentioning

confidence: 99%

Genetic Improvement in Winter Wheat Yields in the Great Plains of North America, 1959–2008

2010

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Data from USDA‐coordinated winter wheat (Triticum aestivum L.) regional performance nurseries collected over the time period 1959 to 2008 were used to estimate genetic gain (loss) in grain yield, grain volume weight, days to heading, and plant height in winter wheats adapted to the Great Plains of North America. In both the Southern Regional (SRPN) and Northern Regional Performance Nurseries (NRPN), linear regression revealed significant positive relationships between relative grain yields of advanced breeding lines and calendar year of the nursery trial. The estimated genetic gain in grain yield potential since 1959 was approximately 1.1% (of the control cultivar Kharkof) yr−1 for all entries in the SRPN, and 1.3% yr−1 if only the most productive entry was considered. For the NRPN, the estimates of genetic gain in grain yield were 0.79% yr−1 for all entries, and also 0.79% yr−1 for the most productive entry. Linear regressions of relative grain yields vs. year over the time period 1984 to 2008, however, showed no statistically significant trend in the SRPN. For the same time period in the NRPN, a statistically significant positive slope of 0.83 was observed, though the coefficient of determination (R2) was only 0.28. Relative grain yields of Great Plains hard winter wheats may have peaked in the early to mid‐1990s, and further improvement in the genetic potential for grain yield awaits some new technological or biological advance.

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Section: Resultsmentioning

confidence: 99%

Genetic Improvement in Winter Wheat Yields in the Great Plains of North America, 1959–2008

2010

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“…Stability analysis provides useful parameter estimates when numbers of treatments and environments considered in the analysis are sufficiently large [36], which is the case in this study. The regression of treatment average yield on the environmental index resulted in regression coefficients shown in Table 11.…”

Section: Stability Analysis Of Grain Yieldsmentioning

confidence: 99%

Effects of Residue Management and Cropping Systems on Wheat Yield Stability in a Semiarid Mediterranean Clay Soil

Mrabet¹

2011

AJPS

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“…napus) cultivars were 34% more stable than their homozygous counterparts. Several studies have also tested stability between homozygous and heterozygous populations and found no signifi cant diff erences (Kohel and White, 1963;Kohel, 1969;Reich and Atkins, 1970;Smith and Foote, 1970;Quisenberry and Kohel, 1971;Peterson et al, 1997). Shank and Adams (1960) and Schnell and Becker (1986) observed increases in the stability of corn (Zea mays L.) hybrids over the inbred population for several measured traits.…”

Section: Researchmentioning

confidence: 99%

Impact of Heterozygosity and Heterogeneity on Cotton Lint Yield Stability

Cole

Bowman

Bourland³

et al. 2009

Crop Science

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In the last 8 yr, cotton (Gossypium hirsutum L.) growers in North Carolina have experienced variations in the year-to-year lint yield averages that range from a 56% increase to a 49% decrease. This variability results in wild fl uctuations in income and a desire for more stable yields. Genetic structure may contribute to stability. This study was conducted to determine the impact of heterozygosity and heterogeneity on lint yield stability. Lint yield was observed in 18 environments over 3 yr among four population types that included homozygous lines grown in pure stands, homozygous lines grown in blended stands, hybrids grown in pure stands, and hybrids grown in blended stands. Comparisons were made using trait means, standard deviations, and the coeffi cients of variation (CVs) calculated over environments. There was no signifi cant difference between lines grown in pure stands and blended lines with respect to yield or stability. Hybrids had a lower CV (were more stable) than homozygous lines. This stability was attributed to the hybrids and blends of hybrids out-yielding the homozygous lines and blends of homozygous lines in the low-yielding environments, but having similar yields in the high-yielding environments. These results do not support growing blends to increase stability or yield; however, growing hybrid cultivars could result in increased yields while reducing variability compared with current production practices.

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Yield Stability of Hybrid vs. Pureline Hard Winter Wheats in Regional Performance Trials

Cited by 27 publications

References 0 publications

Genetic Improvement in Winter Wheat Yields in the Great Plains of North America, 1959–2008

Genetic Improvement in Winter Wheat Yields in the Great Plains of North America, 1959–2008

Effects of Residue Management and Cropping Systems on Wheat Yield Stability in a Semiarid Mediterranean Clay Soil

Impact of Heterozygosity and Heterogeneity on Cotton Lint Yield Stability

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