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Author Ebana K,Shibaya T,Wu J,Matsubara K,Kanamori H,Yamane H,Yamanouchi U,Mizubayashi T,Kono I,Shomura A,Ito S,Ando T,Hori K,Matsumoto T,Yano M
Title Uncovering of major genetic factors generating naturally occurring variation in heading date among Asian rice cultivars.
To dissect the genetic factors controlling naturally occurring variation of heading date in Asian rice cultivars, we performed QTL analyses using F(2) populations derived from crosses between a japonica cultivar, Koshihikari, and each of 12 cultivars originating from various regions in Asia. These 12 diverse cultivars varied in heading date under natural field conditions in Tsukuba, Japan. Transgressive segregation was observed in 10 F(2) combinations. QTL analyses using multiple crosses revealed a comprehensive series of loci involved in natural variation in flowering time. One to four QTLs were detected in each cross combination, and some QTLs were shared among combinations. The chromosomal locations of these QTLs corresponded well with those detected in other studies. The allelic effects of the QTLs varied among the cross combinations. Sequence analysis of several previously cloned genes controlling heading date, including Hd1, Hd3a, Hd6, RFT1, and Ghd7, identified several functional polymorphisms, indicating that allelic variation at these loci probably contributes to variation in heading date. Taken together, the QTL and sequencing results indicate that a large portion of the phenotypic variation in heading date in Asian rice cultivars could be generated by combinations of different alleles (possibly both loss- and gain-of-function) of the QTLs detected in this study.
Journal Theor. Appl. Genet.
Country Japan
Volume 122(6)
Pages 1199-210
Year 2011
PubMed ID 21229229
PubMed Central ID -
DOI 10.1007/s00122-010-1524-1
Gene GHD7 HD16 HD2 HD3A HD5 HD6 HD7 HD9 HD9 RFT1 SE1
INSD AB564437 AB564438 AB564439 AB564440 AB564441 AB564442 AB564443 AB564444 AB564445 AB564446 AB564447 AB564448 AB564449 AB564450 AB564451 AB564452 AB564453 AB564454 AB564455 AB564456 AB564457 AB564458 AB564459 AB564460 AB564461 AB564462 AB564463 AB564464 AB564465 AB564466 AB564467 AB564468 AB564469 AB564470 AB564471 AB564472 AB564474 AB564473 AB564428 AB564429 AB564430 AB564431 AB564432 AB564433 AB564434 AB564435 AB564436
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 -