Changes in Frequency of Plants Resistant to Barley Leaf Rust Caused by <i>Puccinia hordei</i> Otth. in a Barley Composite Cross Population

Reinhold, M.; Bjarko, M. E.; Sands, David C.; Bockelman, Harold E.

doi:10.1111/j.1439-0523.1993.tb00566.x

Cited by 3 publications

(6 citation statements)

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“…A similar intermediate response was obtained by Baltenberger et al (1988) after two cycles of recurrent selection for tolerance to barley yellow dwarf virus in an adapted oat population (−10%). Lower absolute responses (−3%) were found by Reinhold et al (1993) and Walker and Schmitthenner (1984) after eight cycles of recurrent selection for adult plant resistance to leaf rust in barley and three cycles of recurrent selection for tolerance to Phytophthora rot in soybean, respectively. Higher absolute gains per cycle have been reported for resistance to scab (−18%; Jiang et al, 1994) and powdery mildew (−18%; Abdalla et al, 1989) in wheat and leaf rust and powdery mildew in barley (−32 and −19%, respectively; Parlevliet and Van Ommeren, 1988).…”

Section: Resultsmentioning

confidence: 93%

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Recurrent Selection for Partial Resistance to Crown Rust in Oat

2002

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the absence of significant genetic interactions between host and pathogen genotypes (Parlevliet, 1985), the use Crown rust (caused by the fungus Puccinia coronata Cda. f. sp.of this type of resistance in crop cultivars should prevent avenae Eriks.) is a major disease of cultivated oat (Avena sativa L.). Partial resistance is a form of incomplete resistance characterized by a major shifts in the composition of the pathogen populareduced rate of epidemic development and is potentially more durable tion increasing the durability of the disease resistance than complete race-specific resistance. Four rapid cycles of selection (Geiger and Heun, 1989). for partial crown rust resistance were conducted in an oat recurrent Recurrent selection is a population improvement proselection population after the completion of the seventh cycle of cedure that increases the frequency of desirable alleles selection for grain yield. The objectives of this research were to: (i) through repeated cycles of selection and systematic redetermine the effectiveness of rapid cycle recurrent selection for parcombination. This breeding method has been widely tial crown rust resistance; (ii) assess the indirect effect on grain yield, used for improving quantitative traits in cross-pollinated flowering date, and plant height; and (iii) estimate phenotypic and crops. The expression of partial resistance to fungal genetic correlations between traits and broad-sense heritabilities. Recurrent selection parents and check cultivars were evaluated in six pathogens is usually controlled by several genes with environments. Four cycles of selection for partial resistance reduced additive gene action (Veillet et al., 1996; Geiger and the area under the disease progress curve (AUDPC) 42%. This in- Heun, 1989;Parlevliet, 1978). Although these attributes creased resistance was not reflected in higher grain yields under modsuggest that recurrent selection could be an appropriate erate crown rust epidemics, but it produced a 4.7% grain yield gain and effective breeding method for improving disease per cycle in an environment with a severe rust infection. Selection resistance in plants, it has received only limited attention for partial resistance indirectly delayed the flowering date by 2 d. in self-pollinated crops. Recurrent selection has been Entry mean broad-sense heritability estimates were intermediate (41used successfully to increase the resistance in soybean 64%) for AUDPC. Our results show the usefulness of rapid cycle [Glycine max (L.) Merr.] to Phytophthora rot (caused recurrent selection as a population improvement procedure capable of effectively increasing the level of partial resistance to crown rust by Phytophthora megasperma Drechs. f. sp. glycinea in a high-yielding oat population.Kuan and Erwin) (Walker and Schmitthenner, 1984), in barley (Hordeum vulgare L.) to leaf rust (caused by Puccinia hordei Otth.) (Parlevliet and Van Ommeren, 1988;Reinhold et al., 1993), and powdery mildew J.E.

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Section: Resultsmentioning

confidence: 93%

“…glycinea Kuan and Erwin) (Walker and Schmitthenner, 1984), in barley ( Hordeum vulgare L.) to leaf rust (caused by Puccinia hordei Otth.) (Parlevliet and Van Ommeren, 1988; Reinhold et al, 1993), and powdery mildew (caused by Erysiphe graminis DC. f. sp.…”

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Recurrent Selection for Partial Resistance to Crown Rust in Oat

2002

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“…If there are many alleles for resistance in the population, then more selection cycles will result in the increased accumulation of those untapped alleles in the selected population (Jenkins et al, 1954). Repeated recurrent selection cycles for the improvement of partial resistance have been reported in other crops ranged from 4 to 8 (Walker & Schmitthenner, 1984;Reinhold et al, 1993). By alternating sporophytic and gametophytic selection in population improvement one could enhance the effectiveness of selection for a desired trait improvement, although, the magnitude of improvement per cycle would be slower.…”

Section: Resultsmentioning

confidence: 96%

“…One approach to accumulate such partial resistant genes is through a recurrent selection scheme in which susceptible genotypes are constantly removed followed by recombination of the remaining selected genotypes (Parlevliet, 1983). Recurrent selection has been used successfully to increase resistance in oat to crown rust (Diaz-Lago et al, 2002); in soybean to Phytophthora rot (Walker & Schmitthenner, 1984); in barley to leaf rust (Parlevliet & Ommeren, 1988;Reinhold et al, 1993) and soil borne diseases in beans (Garcia et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Sporophytic and gametophytic recurrent selection for improvement of partial resistance to Alternaria leaf blight in sunflower (Helianthus annuus L.)

Rani

Ravikumar

2006

Euphytica

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Alternaria leaf blight, caused by Alternaria helianthi Hanf., is one of the most important diseases of sunflower causing significant yield losses in several tropical countries. Yet, so far, only partial resistance for the disease has been discovered in the germplasm through conventional sporophytic selection. Therefore, the main objective of the present investigation was to compare sporophytic and gametophytic recurrent selection with the aim to enhance the level of resistance to Alternaria leaf blight. The base population was synthesized by random mating three populationstwo interspecific derivatives involving different species of Helianthus and one germplasm accession based on their partial resistance to disease incidence. The base population was subjected to 1-2 cycles of both sporophytic and gametophytic selection. The gametophytic selection was practiced by applying pathogen culture filtrate to the stigma and style one hour before pollination. The selection response was measured by scoring the percent disease index at flowering, 15 days after flowering, and at physiological maturity and by quantifying economic yield gain. A significant reduction in mean per cent disease index values and a gain in seed yield were observed for both the types of selection cycles, but more so for gametophytic selection. The populations improved through gametophytic selection appear to be more promising as the pollen selection allowed the selection of rare favorable allelic combinations that would hardly be detected at the sporophytic level. A combination of gametophytic selection and conventional sporophytic selection should be considered as an effective tool in population improvement programs to achieve higher levels of resistance in relatively short time.

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“…glycinia Kuan and Erwin) (Walker and Schmitthenner, 1984); in barley ( Hordeum vulgare L.) to leaf rust (caused by Puccinia hordei Otth.) (Parlevliet and Ommeren, 1988; Reinhold et al, 1993).…”

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Genetic Enhancement of Resistance to Alternaria Leaf Blight in Sunflower through Cyclic Gametophytic and Sporophytic Selections

Rani

Ravikumar

2007

Crop Science

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Only partial resistance has been reported so far in Helianthus species for leaf blight caused by Alternaria helianthi (Hansf.). Therefore, in the present study one to two cycles of recurrent selection based on sporophytic and gametophytic selection was effected to increase resistance to leaf blight in the base population. The base population was synthesized by random mating five diverse early generation breeding lines. The gamete selection was practiced by applying pathogen culture filtrate to stigma and style 1 h before pollination. The selection response was measured by recording observations on percent disease index (PDI) at flowering, 15 d after flowering and at physiological maturity. In both gametophytic and sporophytic selection cycles significant reduction in PDI was observed. The populations improved through gametophytic selection were more promising as the pollen selection could allow high selection intensity and absence of dominance effects. In sporophytic selection the rare favorable allelic combination is hardly detected. The progress in resistance in two cycles of selection was not very high for their use in crop improvement. There is a need to increase the number of cycle of selection to maximize the desirable alleles to achieve high level of resistance. The gametophytic selection combined with the conventional sporophytic selection can be considered as an effective tool in improving populations for partial resistance.

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Changes in Frequency of Plants Resistant to Barley Leaf Rust Caused by Puccinia hordei Otth. in a Barley Composite Cross Population

Cited by 3 publications

References 13 publications

Recurrent Selection for Partial Resistance to Crown Rust in Oat

Recurrent Selection for Partial Resistance to Crown Rust in Oat

Sporophytic and gametophytic recurrent selection for improvement of partial resistance to Alternaria leaf blight in sunflower (Helianthus annuus L.)

Genetic Enhancement of Resistance to Alternaria Leaf Blight in Sunflower through Cyclic Gametophytic and Sporophytic Selections

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