A leaf rust resistance gene, different from <i>Lr34</i>, associated with leaf tip necrosis in wheat

Mishra, A. N.; Kaushal, Kamini; Yadav, Sangita; Shirsekar, Gautam; Pandey, H. N.

doi:10.1111/j.1439-0523.2005.01140.x

Cited by 9 publications

(4 citation statements)

References 6 publications

(5 reference statements)

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“…Such, they were defined as adult plant or nonspecific resistance controlled genes with lower effect as were Lr 13 or Lr 48 and Lr 49 (Saini et al 2002). Presence of such genes was followed by leaf tip necrosis (Schnurbrush et al 2004, Mishra et al 2005). However, near isogenic lines were multiple based when 2D chromosome was focused, where discovered genes were responsible for day light insensitivity (Worland & Law 1986) Bolton et al (2008) and lower RAR value in comparison to nonspecific resistance controlling genes were supplement to define unusual gene type.…”

Section: Resultsmentioning

confidence: 99%

10.5937/ratpov50-4482 = Functions of LR genes beside reduction of Puccinia triticina

Jerkovic¹,

Prijic²,

Veselinka³

et al. 2013

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Wheat leaf rust race specific resistance controlling genes (Lr) caused 0.01-0.03 decrease of SAGR = divided first two internodes with stem length. In addition, nitrogen transport in upper parts by those genes was 3-19% higher in comparison to near isogenic lines with nonspecific Lr 22a and Lr 22b genes. RAR (divided root nitrogen content with sum of up ground and root ones) values of Lr16, Lr29 and Lr37 between Lr1, Lr15 or Lr19 and nonspecific genes were explained by hydrolytic stability of endo-proteases responsible for cleaving of glutens disulphide bridges. According to RAR, Lr 34 seemed to be specific Lr gene but increased SAGR as was by nonspecific Lr genes focused SUTs as adequate for its conformity. Two different drought and heat stress respond systems were linked to Lr genes; one based on gluten degradation consequential through photosynthesis decrease and another on accelerated transfer of starch products and water in stem.

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Section: Resultsmentioning

confidence: 99%

10.5937/ratpov50-4482 = Functions of LR genes beside reduction of Puccinia triticina

Jerkovic¹,

Prijic²,

Veselinka³

et al. 2013

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“…Prilikom prodora inicijalne hife u stomu svega jedan sat bez vode je dovoljan za ranu aborciju (De Vallavieille-Pope et al, 1995) kao i kod fakultativnih parazita uz duži kritični period (Tomerlin, 1985). Posledice povišenog SAGR-a su bile deficit vode u donjim listovima i transfer ugljenih hidrata u stablo, vidljive preko suvih vrhova a kasnije i celih listova te ubrzanog rasta organa naročito noću (Mishra et al, 2005). Latentni period obligata u uslovima kada ima dovoljno vode i šećera je bio skraćen, ali nisu primećene promene pri povišenom SAGR-u tako da konstatovano izgleda kontradiktorno.…”

Section: Povezanost Tipa Sorte Po Rastu S Nespecifičnom Otpornošćuunclassified

Integrated protection from prevalent wheat parasites in semiarid region

et al. 2013

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This paper is aimed at presenting contemporary knowledge in the field of integral wheat protection against parasites, i.e. the use of cultural measures and genetic analyses directed at adequate use of breeding results, monitoring and forecasting of prevalent parasite growth and development with the aim of rational fungicide application. In addition, the paper suggests the proper use of biological measures through artificial infection with Pyrenophora tritici repentis (Ptr) in years not favourable for facultative parasite development. Growing of the varieties not lower than 85 cm with optimal stem growth ratio in regions with 550-650 mm precipitation, deep and complete soil cultivation plus nutrition before sowing in late October reduced the risk of facultative parasite appearance on lower and middle leaves by over 15%, which was considered useful because of the antagonism to obligate parasites. Severity of Puccinia triticina on last two leaves when facultative parasites were absent was increased at 60-70% as maximal level according to suggested SAGR. Nevertheless, we suggest growing of varieties with prolonged latency period resistant to Puccinia triticina. The aim is to avoid overaccumulation of resistance genes consequential through the decrease of wheat grain yielding potential. Genes facilitating toxin from Ptr spreading have to be excluded because of necessary antagonistic effect from the middle leaves. This implies gene for the obligate parasite specific resistance diversity of varieties in order to reduce the probability of simultaneous overcoming of resistance and avoid insurmountable changes in seed production. The final result of the proposed system should be the last two leaves with mostly minimal parasite appearance and the possibility of economical and efficient single curative treatment application once in ten years when facultative parasites are absent in spring or after the resistance of variety is overcome in standard conditions. The practical aim was also dependent on leaf rust development and green leaf area dissapearence forecasting models as well as balance between the size of the farm and equipment due to short deadlines

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“…Barcellos et al (2000) described two uncharacterized adult plant leaf rust resistance genes in the Brazilian cultivar ÔToropiÕ. Mishra et al (2005) described a new adult plant resistance gene in Indian germplasm that was not Lr34.…”

Section: +mentioning

confidence: 99%

Genetics of leaf rust resistance in three Americano landrace‐derived wheat cultivars from Uruguay

Kolmer¹,

Oelke²,

Liu

2007

Plant Breeding

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A genetic analysis of the landrace-derived wheat accessions Americano 25e, Americano 26n, and Americano 44d, from Uruguay was conducted to identify the leaf rust resistance genes present in these early wheat cultivars. The three cultivars were crossed with the leaf rust susceptible cultivar ÔThatcherÕ and approximately 80 backcross (BC1) F 2 families were derived for each cross. The BC1F 2 families and selected BC1F 4 lines were tested for seedling and adult plant leaf rust resistance with selected isolates of leaf rust, Puccinia triticina. The segregation and infection type data indicated that Americano 25e had seedling resistance genes Lr3, Lr16, an additional unidentified seedling gene, and one adult plant resistance gene that was neither Lr12 nor Lr13, and did not phenotypically resemble Lr34. Americano 26n was postulated to have genes Lr11, Lr12, Lr13, and Lr14a. Americano 44d appeared to have two possibly unique adult plant leaf rust resistance genes.Key words: Triticum aestivum -Puccinia triticina -wheat leaf rust -adult plant resistance -seedling resistanceThe wheat accessions Americano 25e, Americano 26n, and Americano 44d, were derived from landraces in Uruguay in the early 20th century (Kohli 1986). Americano 26n and Americano 44d were released by ÔA. BoergerÕ as cultivars in 1918. In Uruguay, these accessions were among the parents used for the early cultivars Artigas (Americano 25e/Americano 26n, 1924), Larranaga (Americano 25e/Pelon 33c, 1926), ACD 11 (Americano 44d/Pelon 33c, 1931) and Porvenir (Americano 26n/ Pelon IV, 1935). In Argentina, Americano 26n, also known as Klein Universal I, was used as a parent for Klein Record (1925) and Klein H 51 (1929). Americano 44d, also known as Klein Universal II, was used as a parent for Klein Vencedor (1925), Klein Sin Rival (1925), Klein Ceres (1926) and Klein Titan (1925. Americano 25e was used as a parent for Klein San Martin (1926), Klein Mammuth (1927) and Klein Triunfo (1929. These early Uruguayan and Argentine wheats were subsequently used as parents for later cultivars in both countries and also in Brazil (Kohli 1986).Wheat leaf rust, caused by Puccinia triticina Eriks., is an important disease of wheat in South America and worldwide. In recent years, increased susceptibility to leaf rust has been a major cause of cultivar replacement in Uruguay, as the leaf rust pathogen is genetically diverse and virulent races can rapidly increase (German 1996). Wheat cultivars from South America have been a rich source of important leaf rust resistance genes (Dyck et al. 1966, Dyck and Kerber 1977, 1981. Over 50 leaf rust resistance genes have been mapped and given gene designations (McIntosh et al. 2005), however relatively few genes still condition effective resistance to the leaf rust pathogen. This study was undertaken to identify the leaf rust resistance genes present in accessions of Americano 25e, Americano 26n and Americano 44d, in order to determine if new uncharacterized leaf rust resistance genes are possibly present in these three landra...

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A leaf rust resistance gene, different from Lr34, associated with leaf tip necrosis in wheat

Cited by 9 publications

References 6 publications

10.5937/ratpov50-4482 = Functions of LR genes beside reduction of Puccinia triticina

10.5937/ratpov50-4482 = Functions of LR genes beside reduction of Puccinia triticina

Integrated protection from prevalent wheat parasites in semiarid region

Genetics of leaf rust resistance in three Americano landrace‐derived wheat cultivars from Uruguay

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