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GrainGenes Reference Report: TAG-105-113

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Reference	TAG-105-113
Title	Genomic regions controlling vernalization and photoperiod responses in oat
Journal	Theoretical and Applied Genetics
Year	2002
Volume	105
Pages	113-126
Author	Holland JB Portyanko VA Hoffman DL Lee M
Abstract	Summary: Oat genotypes vary for photoperiod and vernalization responses. Vernalization often promotes earlier flowering in fall-sown but not spring-sown cultivars. Longer photoperiods also promote earlier flowering, and the response to longer photoperiods tends to be greater in cultivars from higher latitudes. To investigate the genetic basis of photoperiod and vernalization responses in oat, we mapped QTLs for flowering time under four combinations of photoperiod and vernalization treatments in the Ogle x TAM O-301 mapping population in growth chambers. We also mapped QTLs for flowering time in early spring and late-spring field plantings to determine the genetic basis of response to early spring planting in oat. Three major flowering-time QTLs (on linkage groups OT8, OT31 and OT32) were detected in most conditions. QTLs with smaller effects on flowering were less-consistently observed among treatments. Both vernalization-sensitive and insensitive QTLs were discovered. Longer photoperiod or vernalization alone tended to decrease the effects of flowering-time QTLs. Applied together, longer photoperiod and vernalization interacted synergistically, often on the same genomic regions. Earlier spring planting conferred an attenuated vernalization treatment on seeds. The major flowering-time QTLs mapped in this study matched those mapped previously in the Kanota x Ogle oat mapping population. Between these two studies, we found a concordance of flowering-time QTLs, segregation distortion, and complex genetic linkages. These effects may all be related to chromosomal rearrangements in hexaploid oat. Comparative mapping between oat and other grasses will facilitate molecular analysis of vernalization response in oat
External Databases	http://link.springer.de/link/service/journals/00122/contents/01/00845/
Map Data	Oat-2002-OxT-QTL
QTL	[ Hide all but 1 of 50 ] QEFLD.2002-OxT_2 QEFLD.2002-OxT_7 QEFLD.2002-OxT_8 QEFLD.2002-OxT_11 QEFLD.2002-OxT_12 QEFLD.2002-OxT_16 QEFLD.2002-OxT_20 QEFLD.2002-OxT_31 QEFLD.2002-OxT_32 QEFLD.2002-OxT_34 QFLDATE.2002-OxT_2 QFLDATE.2002-OxT_16 QFLDATE.2002-OxT_31 QLFLD.2002-OxT_2 QLFLD.2002-OxT_5 QLFLD.2002-OxT_8 QLFLD.2002-OxT_20 QLFLD.2002-OxT_26 QLFLD.2002-OxT_31 QLFLD.2002-OxT_32 QLFLD.2002-OxT_34 QNLGC.2002-OxT_6 QNLGC.2002-OxT_8 QNLGC.2002-OxT_10 QNLGC.2002-OxT_11 QNLGC.2002-OxT_13 QNLGC.2002-OxT_31 QNLGC.2002-OxT_32 QNSGC.2002-OxT_8 QNSGC.2002-OxT_11 QNSGC.2002-OxT_13 QNSGC.2002-OxT_20 QNSGC.2002-OxT_26 QNSGC.2002-OxT_31 QPHOTO.2002-OxT_2 QPHOTO.2002-OxT_8 QPHOTO.2002-OxT_19 QPHOTO.2002-OxT_31 QVERN.2002-OxT_1 QVERN.2002-OxT_10 QVERN.2002-OxT_12 QVERN.2002-OxT_13 QVERN.2002-OxT_31 QVLGC.2002-OxT_8 QVLGC.2002-OxT_13 QVLGC.2002-OxT_14 QVLGC.2002-OxT_20 QVLGC.2002-OxT_32 QVLGC.2002-OxT_34 QVSGC.2002-OxT_13
Keyword	arabidopsis [ Show all 39 ]

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