Recurrent selection as breeding strategy for heat tolerance in wheat

Machado, Juarez Campolina; Souza, Moacil Alves de; Oliveira, Davi Melo de; Cargnin, Adeliano; Pimentel, Adérico Júnior Badaró; Assis, Josiane Cristina de

doi:10.12702/1984-7033.v10n01a02

Cited by 12 publications

(12 citation statements)

References 15 publications

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“…Climate Data, 2015), and recurrent selection of lines that are able to germinate and tolerate these or higher temperatures may have resulted in improved heat tolerance among University of Arkansas spinach germplasm. Recurrent selection has been shown to be a successful strategy in breeding for heat tolerance in wheat (Machado et al, 2010) and the unintended but nevertheless present selection pressure for heat tolerance in University of Arkansas spinach lines may result in future releases of heat-tolerant genotypes.…”

Section: Resultsmentioning

confidence: 99%

Effect of Temperature on Seed Germination in Spinach (Spinacia oleracea)

Chitwood

Shi

Evans

et al. 2016

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Breeding heat-tolerant spinach is an important project to meet the demand of increasing spinach production in heat conditions. Seed germination is the early stage to test, screen, and develop heat-tolerant spinach genotypes. The objective of this research was to determine temperature effect on the seed germination percentage and to select heat-tolerant spinach genotypes. A total of nine spinach genotypes were used in this research. The germination experiment was conducted using seven temperatures: 10, 15, 20, 25, 30, 32, and 35 °C under growth chambers. The temperature trials were conducted using completely randomized design (CRD) with three replicates. Spinach seed germination percentage varied among the nine spinach genotypes under the seven temperatures, indicating that genetic variation for heat tolerance existed in the nine spinach genotypes. ‘Donkey’, ‘Marabu’, and ‘Raccoon’ showed higher seed germination percentage with over 70% at 30 and 32 °C, indicating the three spinach genotypes had heat tolerance for germination. However, all spinach genotypes except ‘Ozarka II’ dropped their germination percentages sharply to less than 30%; ‘Ozarka II’ had 63% germination under 35 °C, indicating it is a good source of heat tolerance for seed germination. The higher germination percentages above 30 °C of ‘Ozarka II’, ‘Donkey’, ‘Marabu’, and ‘Raccoon’ may indicate their potential as donors of heat-tolerant traits in spinach breeding program.

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Section: Resultsmentioning

confidence: 99%

Effect of Temperature on Seed Germination in Spinach (Spinacia oleracea)

Chitwood

Shi

Evans

et al. 2016

horts

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“…The selection can be on combined heat and drought tolerance, as required by many crops. Recurrent selection has been successfully used to improve heat tolerance in wheat 129,130 and potato 131 . In wheat, the stable introduction of chromosomes from its wild relative Leymus racemosus provided heat tolerance in hot and …”

Section: Incorporation Of Heat Stress Tolerancementioning

confidence: 99%

Genetic mechanisms of abiotic stress tolerance that translate to crop yield stability

2015

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Crop yield reduction as a consequence of increasingly severe climatic events threatens global food security. Genetic loci that ensure productivity in challenging environments exist within the germplasm of crops, their wild relatives and species that are adapted to extreme environments. Selective breeding for the combination of beneficial loci in germplasm has improved yields in diverse environments throughout the history of agriculture. An effective new paradigm is the targeted identification of specific genetic determinants of stress adaptation that have evolved in nature and their precise introgression into elite varieties. These loci are often associated with distinct regulation or function, duplication and/or neofunctionalization of genes that maintain plant homeostasis.

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“…For example, it looks promising to improve heat tolerance in wheat (Machado et al 2010), or indirectly for increasing grain yield while enhancing host plant resistance in beans (de Oliveira et al 2010) as well as for achieving rapid genetic gains for grain yield in rice (Breseghello et al 2011). Likewise, multi-trait genotypic recurrent selection was able to increase the frequency of favorable alleles in the breeding material, and to select therein the best genotypes in each cycle for further breeding of new potato cultivars or parents (Bradshaw et al 2011).…”

Section: Recurrent Selection and Breeding Populationsmentioning

confidence: 99%

Population Improvement

Ríos

2015

Plant Breeding in the Omics Era

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Cyclical phenotypic selection methods such as mass selection in open-pollinated (OP) cultivars were used widely in plant breeding until the inbred-hybrid approach began in the first half of the twentieth century. Mass selection was very effective to breed distinct OP cultivars but not for selecting high-yielding cultivars. This failure was due to selecting individual plants for a low heritability trait such as edible yield, low correlation of traits used in selection with edible yield, inappropriate male gamete control resulting from weak plot isolation, and poor plot techniques unable to control local environmental effects. Hence, population improvement methods, such as recurrent selection aiming to increase the frequency of favorable alleles by selecting the superior individuals in a population, intermating them, and selecting the best among their offspring, were sought in plant breeding (Hallauer et al. 2010). Recurrent selection differs from mass selection because selected individuals from the base population undergo progeny testing, and thereafter those selected based on this progeny testing data are intermated with each other to form the new population. Selection ensuing from recurrent selection can be further used in pedigree breeding for recycling inbred lines.

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Recurrent selection as breeding strategy for heat tolerance in wheat

Cited by 12 publications

References 15 publications

Effect of Temperature on Seed Germination in Spinach (Spinacia oleracea)

Effect of Temperature on Seed Germination in Spinach (Spinacia oleracea)

Genetic mechanisms of abiotic stress tolerance that translate to crop yield stability

Population Improvement

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