QTL analysis for panicle characteristics in temperate japonica rice |
| |
Authors: | Masumi Yamagishi Yoshinobu Takeuchi Izumi Kono Masahiro Yano |
| |
Institution: | (1) Research Institute of Agricultural Resources, Ishikawa Agricultural College, Nonoichi, Ishikawa 921-8836, Japan;(2) Faculty of Life and Environmental Science, Shimane University, Matsue, Shimane 690-8504, Japan;(3) Institute of the Society for Techno-innovation of Agriculture, Forestry and Fisheries, Tsukuba, Ibaraki 305-0854, Japan;(4) National Institute of Agrobiological Resources, 2-1-2, Kannondai, Tsukuba, Ibaraki 305-8602, Japan |
| |
Abstract: | To understand the genetic background of panicle characteristics in temperate japonica rice (Oryza sativa L.), we genetically analyzed DH lines derived from a cross between two temperate japonica rice cultivars, ‘Akihikari’ and
‘Koshihikari’,in 1996 and 1997. Four traits of panicle characteristics, number of primary branches per panicle (NPB), number
of secondary branches per panicle (NSB), average number of spikelets on one primary branch (NSP)and average number of spikelets
on one secondary branch (NSS), in 212 DH lines were measured, and the interval mapping of QTLs for these traits was carried
out using169 DNA markers with an LOD threshold of2.5. Five, three and one putative QTLs for NPB, NSB and NSS were identified,respectively,
and no QTLs relating to NSP appeared. The percentages in total phenotypic variation explained by all putative QTLs for NPB
were 35.5%: and43.8% in 1996 and 1997, respectively. All putative QTLs for NSB accounted for 35.5%and 27.5% of total phenotypic
variation in1996 and 1997, respectively. The QTLs identified in this study will be useful intemperate japonica rice breeding
for improved spikelet yield.
This revised version was published online in August 2006 with corrections to the Cover Date. |
| |
Keywords: | interval mapping japonica rice Oryza sativa L primary branch quantitative trait loci secondary branch |
本文献已被 SpringerLink 等数据库收录! |
|