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QTL Mapping for Vining Growth Habit of a Wild Soybean Accession PI342618B(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:
2015年06期
Page:
933-937
Research Field:
Publishing date:

Info

Title:
QTL Mapping for Vining Growth Habit of a Wild Soybean Accession PI342618B
Author(s):
LIU Li;  XING Guang-nan;  LI Xu-liang;  XU Zhi-yong;  KONG Jie-jie;  GAI Jun-yi;  ZHAO Tuan-jie
Soybean Research Institute, Nanjing Agricultural University/National Center for Soybean Improvement/Key Laboratory of Biology and Genetic Improvement of Soybean, Ministry of Agriculture/National Key Laboratory for Crop Genetics and Germplasm Enhancement, Nanjing 210095, China
Keywords:
Glycine soja;  Vining growth habit;  QTL mapping;  Composite interval mapping
PACS:
-
DOI:
10.11861/j.issn.1000-9841.2015.06.0933
Abstract:
Vining growth habit is the basic characteristics of annual wild soybean. In the present study, 286 lines of a recombinant inbred line population (NJRINP) derived from the cross between Nannong 86-4 and PI342618B were used to conduct field experiments.Vining growth habit was investigated at beginning flowering (R1) and full maturity stage (R8) in 2013 and 2014, respectively. The composite interval mapping (CIM) of the software WinQTLCart 2.5 was used to map QTL with a genetic linkage map of 226 markers. The linkage group D1a(Chromosome 1), G(Chr-18) and L(Chr-19) were found to be related with vining growth habit at R1 stage. The QTL -qVGH-D1a, qVGH-G-1 and qVGH-G-2 was detected during the two years, the QTL qVGH-G-2, which accounted for 14.16% and 14.18% of phenotypic variation, was the major QTL controlling vining growth habit at R1 stage.Two loci qVGH-G-1 and qVGH-L were found for vining growth habit at R8 stage.The qVGH-G-1 on linkage group G had similar contribution of phenotypic variation at both R1 and R8 stages, indicating that the locus was a stable one at whole growth period.The qVGH-L on Linkage group L accounted for 39.11% and 23.14% of phenotypic variation in two years respectively, was considered to be a mojor QTL controlling vining growth habit at R8 stage. It might be related to determinate habit gene Dt1according to its physical position on the chromosome.All positive alleles of vining growth habit are from PI342618B.However, the genetic system of vining growth habit at R1 stage is different from that at R8 stage

References:

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Last Update: 2015-12-30