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Author Lee S,Costanzo S,Jia Y,Olsen KM,Caicedo AL
Title Evolutionary dynamics of the genomic region around the blast resistance gene Pi-ta in AA genome oryza species.
The race-specific resistance gene Pi-ta has been effectively used to control blast disease, one of the most destructive plant diseases worldwide. A single amino acid change at the 918 position of the Pi-ta protein was known to determine resistance specificity. To understand the evolutionary dynamics present, we examined sequences of the Pi-ta locus and its flanking regions in 159 accessions composed of seven AA genome Oryza species: O. sativa, O. rufipogon, O. nivara, O. meridionalis, O. glaberrima, O. barthii, and O. glumaepatula. A 3364-bp fragment encoding a predicted transposon was found in the proximity of the Pi-ta promoter region associated with the resistance phenotype. Haplotype network analysis with 33 newly identified Pi-ta haplotypes and 18 newly identified Pi-ta protein variants demonstrated the evolutionary relationships of Pi-ta haplotypes between O. sativa and O. rufipogon. In O. rufipogon, the recent directional selection was found in the Pi-ta region, while significant deviation from neutral evolution was not found in all O. sativa groups. Results of sequence variation in flanking regions around Pi-ta in O. sativa suggest that the size of the resistant Pi-ta introgressed block was at least 5.4 Mb in all elite resistant cultivars but not in the cultivars without Pi-ta. These findings demonstrate that the Pi-ta region with transposon and additional plant modifiers has evolved under an extensive selection pressure during crop breeding.
Journal Genetics
Country USA
Volume 183(4)
Pages 1315-25
Year 2009
PubMed ID 19822730
PubMed Central ID -
DOI 10.1534/genetics.109.108266
INSD GQ918334 GQ918335 GQ918336 GQ918337 GQ918338 GQ918339 GQ918340 GQ918341 GQ918342 GQ918343 GQ918344 GQ918345 GQ918346 GQ918347 GQ918348 GQ918349 GQ918350 GQ918351 GQ918352 GQ918353 GQ918354 GQ918355 GQ918356 GQ918357 GQ918358 GQ918359 GQ918360 GQ918361 GQ918362 GQ918363 GQ918364 GQ918365 GQ918366 GQ918367 GQ918368 GQ918369 GQ918370 GQ918371 GQ918372 GQ918373 GQ918374 GQ918375 GQ918376 GQ918377 GQ918378 GQ918379 GQ918380 GQ918381 GQ918382 GQ918383 GQ918384 GQ918385 GQ918386 GQ918387 GQ918388 GQ918389 GQ918390 GQ918391 GQ918392 GQ918393 GQ918394 GQ918395 GQ918396 GQ918397 GQ918398 GQ918399 GQ918400 GQ918401 GQ918402 GQ918403 GQ918404 GQ918405 GQ918406 GQ918407 GQ918408 GQ918409 GQ918410 GQ918411 GQ918412 GQ918413 GQ918414 GQ918415 GQ918416 GQ918417 GQ918418 GQ918419 GQ918420 GQ918421 GQ918422 GQ918423 GQ918424 GQ918425 GQ918426 GQ918427 GQ918428 GQ918429 GQ918430 GQ918431 GQ918432 GQ918433 GQ918434 GQ918435 GQ918436 GQ918437 GQ918438 GQ918439 GQ918440 GQ918441 GQ918442 GQ918443 GQ918444 GQ918445 GQ918446 GQ918447 GQ918448 GQ918449 GQ918450 GQ918451 GQ918452 GQ918453 GQ918454 GQ918455 GQ918456 GQ918457 GQ918458 GQ918459 GQ918460 GQ918461 GQ918462 GQ918463 GQ918464 GQ918465 GQ918466 GQ918467 GQ918468 GQ918469 GQ918470 GQ918471 GQ918472 GQ918473 GQ918474 GQ918475 GQ918476 GQ918477 GQ918478 GQ918479 GQ918480 GQ918481 GQ918482 GQ918483 GQ918484 GQ918485 GQ918486 GQ918487 GQ918488 GQ918489 GQ984160
Strain Wild Core Collection -
Induced Mutation Lines(NIG Collection) -
Sterile Seed Strain -
Lethal Embryo
Mutantion Strain
Stages in Each Organ
- Muant Lines (Gene)
Cultivated Varieties(NIG Collection) -
Stages in Each Organ -