Identification of <Emphasis Type="Italic">qSOR1</Emphasis>, a major rice QTL involved in soil-surface rooting in paddy fields |
| |
Authors: | Yusaku?Uga Eiko?Hanzawa Shinsei?Nagai Kazuhiro?Sasaki Masahiro?Yano Email author" target="_blank">Tadashi?SatoEmail author |
| |
Institution: | (1) National Institute of Agrobiological Sciences, 2-1-2 Kannondai, Tsukuba Ibaraki, 305-8602, Japan;(2) Graduate School of Life Sciences, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai Miyagi, 980-8577, Japan; |
| |
Abstract: | Specific Indonesian lowland rice (Oryza sativa L.) cultivars elongate thick primary roots on the soil surface of paddy fields. To clarify the genetic factors controlling
soil-surface rooting, we performed quantitative trait locus (QTL) analyses using 124 recombinant inbred lines (RILs) derived
from a cross between Gemdjah Beton, an Indonesian lowland rice cultivar with soil-surface roots, and Sasanishiki, a Japanese
lowland rice cultivar without soil-surface roots. These cultivars and the RILs were tested for soil-surface rooting in a paddy
field. We identified four regions of chromosomes 3, 4, 6, and 7 that were associated with soil-surface rooting in the field.
Among them, one major QTL was located on the long arm of chromosome 7. This QTL explained 32.5–53.6% of the total phenotypic
variance across three field evaluations. To perform fine mapping of this QTL, we measured the basal root growth angle of crown
roots at the seedling stage in seven BC2F3 recombinant lines grown in small cups in a greenhouse. The QTL was mapped between markers RM21941 and RM21976, which delimit
an 812-kb interval in the reference cultivar Nipponbare. We have designated this QTL qSOR1 (quantitative trait locus for SOIL SURFACE ROOTING 1). |
| |
Keywords: | |
本文献已被 PubMed SpringerLink 等数据库收录! |
|