Detection of quantitative trait loci controlling extremely early heading in rice |
| |
| Authors: | Y Nonoue K Fujino Y Hirayama U Yamanouchi S Y Lin M Yano |
| |
| Institution: | (1) Institute of Society for Techno-innovation of Agriculture, Forestry and Fisheries, 446-1 Kamiyokoba, Tsukuba Ibaraki, 305-0854, Japan;(2) Hokuren Agricultural Research Institute, Kita-15 Higashi-5, Naganuma, Yubari Hokkaido, 067-1317, Japan;(3) Hokkaido Prefectural Kamikawa Agricultural Experiment Station, Minami-1-5, Pippu, Kamikawa Hokkaido, 078-0397, Japan;(4) National Institute of Agrobiological Sciences, 2-1-2 Kannondai, Tsukuba Ibaraki, 305-8602, Japan;(5) Present address: Hokkaido Central Agricultural Experiment Station, Kamihoromui 217, Iwamizawa Hokkaido, 069-0365, Japan;(6) Present address: Honda Research Institute Japan Co., Ltd, 2-1-4 Kazusa-Kamatari, Kisarazu Chiba, 292-0818, Japan |
| |
| Abstract: | To clarify the genetic basis of extremely early heading in rice, we conducted quantitative trait locus (QTL) analyses using
F2 populations from two genetically wide cross combinations, Hayamasari/Kasalath (HaF2) and Hoshinoyume/Kasalath (HoF2). Hayamasari and Hoshinoyume are extremely early-heading japonica cultivars. Photoperiod sensitivity is completely lost in Hayamasari and weak in Hoshinoyume. Three QTLs, QTL(chr6), QTL(chr7),
and QTL(chr8), for days-to-heading (DTH) in HaF2 were detected on chromosomes 6, 7, and 8, respectively, and QTL(chr6) and QTL(chr7) were detected in HoF2. On the basis of the chromosomal locations, QTL(chr6), QTL(chr7), and QTL(chr8) may be likely to be Hd1, Hd4, and Hd5, respectively, which had been detected previously as QTLs for DTH in an F2 population of Nipponbare × Kasalath. Alleles of QTL(chr7) decreased DTH dramatically in both Hayamasari and Hoshinoyume,
suggesting that QTL(chr7) has a major role in determining extremely early heading. In addition, allele-specific interactions
were detected between QTL(chr6), QTL(chr7) and QTL(chr8). This result suggests that not only allelic differences but also
epistatic interactions contribute to extremely early heading. QTL(chr8) was detected in HaF2, but not in HoF2, suggesting that it determines the difference in DTH between Hayamasari and Hoshinoyume. A major QTL was also detected in
the region of QTL(chr8) in QTL analysis using an F2 population of Hayamasari × Hoshinoyume. This result supports the idea that QTL(chr8) is a major factor that determines the
difference in DTH between Hayamasari and Hoshinoyume, and is involved in photoperiod sensitivity. |
| |
| Keywords: | |
| 本文献已被 PubMed SpringerLink 等数据库收录！ |
|
