%0 Journal Article
%T Molecular mapping of QTLs for root response to phosphorus deficiency at seedling stage in wheat (Triticum aestivum L.)<br>
%A Li Zhenxing
%A Ni Zhongfu
%A Peng Huiru
%A Liu Zhiyong
%A Nie Xiuling
%A Xu Shengbao
%A Liu Gang
%A Sun Qixin
%A <br>
%J 自然科学进展
%D 2007
%I 
%X Phosphorus (P) deficiency in the soil is one of the major abiotic stresses that limit plant growth and crop productivity throughout the world. Development of cultivars with improved P-deficiency tolerance is an efficient strategy for sustainable agriculture. Plant roots play an important role in crop growth and development, especially in nutrient uptake and improvement of P-efficiency. Mapping quantitative trait loci (QTLs) for root traits and their response to low P stress at seedling stage will facilitate the development of P-efficient wheat cultivars. In this study, 30 QTLs (LOD>2.0) were mapped for the three root traits, such as root length, root number and root dry matter under different P supply conditions and their response to P-stress. These QTLs were distributed on 14 chromosomes, with each of the 5 QTLs explaining more than 10% phenotype variance. Analyses showed that root traits and their response to P-deficiency were controlled by different QTLs. In addition, alleles with positive effects were separated on both parents, and wheat cultivars with improved P-efficiency could be developed by accumulating these positive effect alleles together.
%K QTLs
%K roots
%K wheat seedling
%K RIL
%K P-deficiency<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=01BA20E8BA813E1908F3698710BBFEFEE816345F465FEBA5&cid=96E6E851B5104576C2DD9FC1FBCB69EF&jid=504AF8C1E5476CA7C4EC9DF6FEAC14AC&aid=79F6732F7145CAE3F460632889F4A650&yid=A732AF04DDA03BB3&vid=BCA2697F357F2001&iid=F3090AE9B60B7ED1&sid=A60ED5C9472B8BEB&eid=01A9864A3FFB986F&journal_id=1002-008X&journal_name=自然科学进展&referenced_num=0&reference_num=0