Genes conferring low seedling reaction to Mexican pathotypes of Puccinia recondita f. sp. tritici, and adult-plant responses of recent wheat cultivars from the former USSR

Singh, Ravi P.; Моргунов, А. И.; Espino, Julio Huerta

doi:10.1007/bf00025611

Cited by 8 publications

(10 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Genes Lr12, Lr22a, Lr22b and Lr35 are known to be effective only in adult plant, McIntosh et al (1995). Similar results were suggested by Singh et al (1995) and Kolmer (2002). The susceptibility of leaf seedlings of the nearisogenic lines (NIL) possessing Lr37 probably resulted from the warmer conditions (15-25 "C ).…”

Section: Discussionsupporting

confidence: 91%

GENETIC PREDICTION OF LEAF RUST RESISTANCE THROUGH CROSSING BETWEEN TWO Lr,s AND FIVE EGYPTIAN WHEAT VARIETIES.

Youssef

Hamada

2012

Journal of Agricultural Chemistry and Biotechnology

View full text Add to dashboard Cite

Leaf rust caused by Puccinia triticina Eriks.is a common and widespread disease of wheat in Egypt and worldwide. Durable genetic resistance to leaf rust in wheat has been difficult to achieve, since the virulence of leaf rust pathogen to specific leaf rust resistance genes form high variability in wheat cultivars aiming to make a genetic prediction of leaf rust resistance, six crosses i.e. Lr25/Gemmeiza 7 , Lr25/Giza163 , Lr25/sids1; Lr35/Gemmeiza7 , Lr35/sakha 61 and Lr35/Sakha93 were carried out. These Egyptian Wheat varieties showed high infection type at both seedling and adult while Lr25 showed resistance and Lr35 was susceptible at seedling stage , but at adult plant stage they showed low rust severity under greenhouse and field conditions subsequently. The segregation in the F2 plant populations at both seedling and adult plants stage tending to the side of partial resistance and dominance with digenic pairs. Lr25 or Lr35 have low rust severity because of the rarity of leaf rust isolates with virulence to Lr25 or Lr35. Wheat cultivars with the combination of Lr25 or Lr35 displayed high levels of partial leaf rust resistance. From this stand point, these cultivars don"t contain Lr25 or Lr35. The dominant nature of some of the slow rusting resistance genes in crosses are of a great interest in breeding for rust durable resistance. This type of resistance will be easier in segregating generations as smaller population sizes would be required than when used lesser effects.

show abstract

Section: Discussionsupporting

confidence: 91%

GENETIC PREDICTION OF LEAF RUST RESISTANCE THROUGH CROSSING BETWEEN TWO Lr,s AND FIVE EGYPTIAN WHEAT VARIETIES.

Youssef

Hamada

2012

Journal of Agricultural Chemistry and Biotechnology

View full text Add to dashboard Cite

show abstract

“…The reactions of 55 spring wheat varieties released in the USSR from 1975 to 1991 were studied in Mexico (Singh et al 1995). Almost half of the cultivars had high or moderate degrees of adult plant resistance.…”

Section: Spring Wheat Breeding For Rust Resistance In Siberiamentioning

confidence: 99%

Genetic protection of wheat from rusts and development of resistant varieties in Russia and Ukraine

Morgounov¹,

Ablova

Babayants³

et al. 2010

Euphytica

View full text Add to dashboard Cite

Leaf rust represents the major threat to wheat production in Russia and Ukraine. It has been present for many years and epidemics of the pathogen occur in different regions on both winter and spring wheat. In some regions there is evidence of more frequent epidemics, probably due to higher precipitation as a result of climate change. There is evidence that the virulence of the leaf rust population in Ukraine and European Russia and on winter wheat and spring wheat is similar. The pathogen population structure in Western Siberia is also similar to the European part, although there are some significant differences based on the genes employed in different regions. Ukrainian wheat breeders mostly rely on major resistance genes from wide crosses and have succeeded in developing resistant varieties. The North Caucasus winter wheat breeding programs apply the strategy of deploying varieties with different types of resistance and genes. This approach resulted in decreased leaf rust incidence in the region. Genes Lr23 and Lr19 deployed in spring wheat in the Volga region were rapidly overcome by the pathogen. There are continuing efforts to incorporate resistance from wild species. The first spring wheat leaf rust resistant varieties released in Western Siberia possessed gene LrTR which protected the crop for 10-15 years, but was eventually broken in 2007. Slow rusting is being utilized in several breeding programs in Russia and Ukraine, but has not become a major strategy.

show abstract

“…For example, the combinations Lr 13 + 26; Lr 23 + 26; Lr 13, 27+31 + ? are very highly effective in Mexico, Central and South American regions (Singh andRajaram 1991, Singh 1993). The seedlings of Mexican bread wheat cultivars, which carry Lr-gene combinations, displayed different infection types when inoculated with the pp 19K, pp 19, pp Ag'l and pp Ag'2 pathotypes, as indicated in Table 2b.…”

Section: Seedlings Of Thementioning

confidence: 99%

“…Ideally, we would hke to add the genes Lr 13 and Lr 17 from 'Inia 66' (Singh and Rajaram 1991) to the Lr 19d of 'Indis'. These Lr genes, namely Lr 19, 19d, Ag'l, Ag'2 and 38, which derive from the genus Agropyron are highly effective and have not been overcome until now.…”

mentioning

confidence: 99%

“…Agropyron intermedium (Host) Beauv has also been investigated for rust resistance, but only one gene {Lr 38) has been assigned in the Catalogue of gene symbols for wheat (Mclntosh et al 1993). In the literature available to us we failed to find reports about pathotypes virulent to the genes Lr 19,19d,Ag'l,Ag'2 and 38. Researchers from difFerent parts of the world have all rated these genes as highly effective to all pathotypes of leaf rust (Singh and Rajaram 1991, Singh 1993, Singh et al 1995, Marais 1992, Sibikeev et al 1995, Dyck and Friebe 1993.…”

mentioning

confidence: 99%

See 1 more Smart Citation

First report of leaf rust pathotypes virulent to highly effective Lr‐genes transferred from Agropyron species to bread wheat

et al. 1996

View full text Add to dashboard Cite

The gene pool of effective sources of leaf rust resistance used in the breeding of wheat {Triticum aestivum L.) includes several species of the genus Agropyron. The genes deriving therefrom {Lr 19, 19d, 29, Ag'l, Ag'2, 38) are highly effective to pathotypes of Puccinia recondita Rob. ex Desm. In the Saratov and Orenbhurg districts of Russia, however, pathotypes virulent to these genes have been discovered. These pathotypes are virulent to Saratov-bred cultivars carrying Lr 19, to 'Indis' {Lr 19d) and RL 6097 {Lr 38). The distribution of virulence on the 'Thatcher' near-isogenic lines with different Lr genes shows that most of the Lr genes tested are susceptible to these new pathotypes of P. recondita, but the Lr genes Lr 9, 23, 24, 26 were exceptions. The inoculation of Mexican bread wheat cultivars, which carry widespread Lr gene combinations, by these pathotypes disclosed different infection types. Out of 10 Lr-gene combinations, four were highly effective; namely the combinations Lr 13+26, Lr 26 + ?, Lr 23+26 and Lr 23+26+34.

show abstract

Genes conferring low seedling reaction to Mexican pathotypes of Puccinia recondita f. sp. tritici, and adult-plant responses of recent wheat cultivars from the former USSR

Cited by 8 publications

References 11 publications

GENETIC PREDICTION OF LEAF RUST RESISTANCE THROUGH CROSSING BETWEEN TWO Lr,s AND FIVE EGYPTIAN WHEAT VARIETIES.

GENETIC PREDICTION OF LEAF RUST RESISTANCE THROUGH CROSSING BETWEEN TWO Lr,s AND FIVE EGYPTIAN WHEAT VARIETIES.

Genetic protection of wheat from rusts and development of resistant varieties in Russia and Ukraine

First report of leaf rust pathotypes virulent to highly effective Lr‐genes transferred from Agropyron species to bread wheat

Contact Info

Product

Resources

About