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Acta Agronomica Sinica ›› 2019, Vol. 45 ›› Issue (9): 1338-1348.doi: 10.3724/SP.J.1006.2019.84172

• CROP GENETICS & BREEDING · GERMPLASM RESOURCES · MOLECULAR GENETICS • Previous Articles     Next Articles

QTL mapping of oleic acid, linoleic acid and linolenic acid contents in Brassica napus L. using DH and IF2 populations

MENG Jiang-Yu1,FU Ying1,2,HE Ya-Jun1,*(),QIAN Wei1   

  1. 1 College of Agronomy and Biotechnology, Southwest University, Chongqing 400716, China
    2 Institute of Crop and Nuclear Technology Utilization, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, Zhejiang, China
  • Received:2018-12-17 Accepted:2019-05-12 Online:2019-09-12 Published:2019-06-10
  • Contact: Ya-Jun HE E-mail:hyj790124@163.com
  • Supported by:
    This study was supported by the National Key Research and Development Program of China(2016YFD0100202);the National Natural Science Foundation of China(31671729);Chongqing Research Program of Basic Research and Frontier Technology(cstc2017jcyjAX0391)

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Abstract:

DH and IF2 populations, consisting of 261 and 234 lines respectively, constructed using the German winter rapeseed cultivar ‘Express’ (female) and the Chinese semi-winter line ‘SWU07’ (male), were used to detect QTLs related to oleic acid, linoleic acid and linolenic acid contents in different years. A total of 71 QTLs were detected in DH population in four-year environment and 4 QTLs in IF2 population in two-year environment. After eliminating the overlapped QTLs detected in different years or different populations, totally 51 QTLs for the three traits were obtained, 15 QTLs of which were persistently detected in more than two years. These 51 QTLs were located on 13 linkage groups. Among them, 18 QTLs related to oleic acid content were located on A01, A02, A04, A05, A07, A09, and C01, respectively, explaining phenotypic variation ranging from 3.44% to 13.97%, 12 QTLs related to linoleic acid content were located on A02, A06, A09, C01, and C02, respectively, explaining phenotypic variation ranging from 3.84% to 19.51%, and 21 QTLs related to linolenic acid content were located on A01, A02, A03, A04, A05, A08, A09, C01, C02, C03, and C06, respectively, explaining phenotypic variation from 2.86% to 11.91%. These results provide more genetic information for the improvement of fatty acid quality in rapeseed breeding.

Key words: Brassica napus, oleic acid, linoleic acid, linolenic acid, QTL

Table 1

Analysis of OAC, Llei, and Llen contents in parental lines (%)"

性状 Trait 油酸 OAC 亚油酸 Llei 亚麻酸 Llen
Express 61.89 19.97 7.70
SWU07 64.67 16.80 6.88
P t-test 0.016 0.018 0.166

Table 2

Analysis of OAC, Llei, and Llen contents in DH and IF2 populations (%)"

年份
Year		 性状
Trait		 DH群体 DH population IF2群体 IF2 population
最小值
Min.		 最大值
Max.		 平均值
Average		 标准差
SD		 最小值
Min.		 最大值
Max.		 平均值
Average		 标准差
SD
2010 油酸 OAC 49.30 67.10 59.11 3.42 44.83 66.24 59.63 3.12
亚油酸 Llei 14.50 25.30 19.68 2.13 15.77 24.14 19.17 1.82
亚麻酸 Llen 5.44 11.08 8.28 1.06 6.43 11.08 8.36 0.88
2011 油酸 OAC 49.72 77.45 64.60 3.66 59.32 72.53 65.16 2.27
亚油酸 Llei 9.05 23.41 16.33 1.67 13.33 18.87 15.67 1.03
亚麻酸 Llen 4.77 11.40 6.71 0.84 5.21 7.71 6.38 0.54
2012 油酸 OAC 50.94 71.15 60.88 3.34 - - - -
亚油酸 Llei 15.14 25.83 19.81 2.19 - - - -
亚麻酸 Llen 5.19 10.92 8.47 0.97 - - - -
2013 油酸 OAC 52.00 71.37 63.12 3.41 - - - -
亚油酸 Llei 13.41 24.02 18.05 2.15 - - - -
亚麻酸 Llen 5.25 11.28 8.50 1.06 - - - -

Fig. 1

Frequency distribution of OAC, Llei, and Llen contents in DH and IF2 populations"

Table 3

Correlation analysis of the same trait in different years in DH and IF2 populations"

年份
Year		 性状
Trait		 DH群体 DH population IF2群体 IF2 population
2010 2011 2012 2013 2010 2011
油酸 OAC 2010
2011 0.4549** 0.3476**
2012 0.5305** 0.5495**
2013 0.4068** 0.5135** 0.5630**
亚油酸 Llei 2010
2011 0.5589** 0.4320**
2012 0.5549** 0.5663**
2013 0.4919** 0.5887** 0.5613**
亚麻酸 Llen 2010
2011 0.4686** 0.2548*
2012 0.5200** 0.4270**
2013 0.5463** 0.4194** 0.6067**

Table 4

Correlation analysis of different traits in the same year in DH and IF2 populations"

年份
Year		 性状
Trait		 油酸
OAC		 亚油酸
Llei		 亚麻酸
Llen
2010 油酸 OAC -0.7018** -0.7200**
亚油酸 Llei -0.6353** 0.6839**
亚麻酸 Llen -0.6510** 0.6791**
2011 油酸 OAC -0.5899** -0.4682**
亚油酸 Llei -0.6439** 0.5080**
亚麻酸 Llen -0.6449** 0.6335**
2012 油酸 OAC
亚油酸 Llei -0.5119**
亚麻酸 Llen -0.6858** 0.5735**
2013 油酸 OAC
亚油酸 Llei -0.6612**
亚麻酸 Llen -0.5695** 0.6210**

Table 5

Putative QTLs for OAC detected in DH and IF2 populations"

QTL名称
QTL name		 位置
Position		 加性效应
Additive		 贡献率
R2(%)		 LOD 值
LOD score		 置信区间
Confidence interval
qA01-OAC-2010DH-1 10.31 -0.90 6.83 5.82 9.4-11.1
qA01-OAC-2010DH-2 24.21 -0.87 6.36 5.03 22.6-27.5
qA09-OAC-2010DH-3 48.21 0.79 5.02 4.30 45.3-49.5
qA09-OAC-2010DH-4 53.81 0.68 3.44 2.95 51.9-56.7
qA09-OAC-2010DH-5 76.91 -1.29 12.85 9.41 75.9-81.0
qA09-OAC-2010DH-6 82.41 -1.17 10.84 8.48 81.0-87.7
qA09-OAC-2010DH-7# 91.51 -1.04 8.96 6.33 88.5-98.5
qC01-OAC-2010DH-8# 27.41 -1.38 13.97 10.52 25.4-28.7
qC01-OAC-2010DH-9# 30.71 -1.41 13.72 10.91 29.9-31.0
qA09-OAC-2011DH-10# 94.51 -0.81 4.79 2.65 89.9-98.8
qC01-OAC-2011DH-11# 23.91 -1.09 6.88 4.62 22.6-24.4
qC01-OAC-2011DH-12# 29.31 -1.14 7.91 5.45 28.0-29.9
qA02-OAC-2012DH-13 42.71 0.80 5.52 2.95 41.6-43.4
qA02-OAC-2012DH-14 47.01 0.82 5.70 3.06 44.9-51.0
qA04-OAC-2012DH-15 40.51 -0.91 7.15 3.80 36.4-46.6
qA09-OAC-2012DH-16 70.21 -0.88 5.88 3.42 68.1-70.8
qC01-OAC-2012DH-17 12.71 -0.94 6.30 3.22 12.1-13.7
qC01-OAC-2012DH-18# 23.61 -1.34 11.22 5.33 22.6-23.9
qC01-OAC-2012DH-19# 30.71 -1.21 9.15 4.68 29.3-31.4
qA09-OAC-2013DH-20# 91.51 -0.91 7.02 3.97 89.6-98.8
qC01-OAC-2013DH-21# 25.41 -0.78 4.35 3.00 25.1-28.0
qA02-OAC-2010IF2-22 18.21 -0.91 5.78 2.63 16.2-19.4
qA05-OAC-2011IF2-23 108.51 0.51 4.94 2.50 90.3-115.5
qA07-OAC-2011IF2-24 5.01 0.63 6.42 3.64 1.1-8.1

Fig. 2

QTLs for OAC, Llei, and Llen on different linkage groups"

Table 6

Putative QTL for Llei detected in DH population"

QTL名称
QTL name		 位置
Position		 加性效应
Additive		 贡献率
R2 (%)		 LOD值
LOD score		 置信区间
Confidence interval
qA09-Llei-2010DH-1 38.21 -0.42 3.84 2.93 34.8-39.5
qA09-Llei-2010DH-2# 68.51 0.77 11.85 8.61 68.1-69.7
qA09-Llei-2010DH-3# 77.81 0.87 15.76 11.77 76.5-81.0
qA09-Llei-2010DH-4# 83.41 0.77 12.24 8.06 81.4-88.5
qC01-Llei-2010DH-5# 26.41 0.74 10.57 7.35 26.0-28.6
qA06-Llei-2011DH-6 38.61 -0.34 4.00 2.83 34.6-41.2
qA09-Llei-2011DH-7# 78.81 0.64 11.61 8.45 77.2-81.2
qA09-Llei-2011DH-8# 94.51 0.48 7.65 4.26 88.5-98.5
qC01-Llei-2011DH-9 23.91 0.50 7.43 5.48 22.6-24.3
qA09-Llei-2012DH-10# 69.71 0.83 13.69 6.52 68.4-72.0
qA09-Llei-2012DH-11# 76.91 0.98 19.51 9.03 75.9-77.8
qA09-Llei-2012DH-12# 96.51 0.72 10.28 4.23 88.5-98.7
qC01-Llei-2012DH-13 6.01 0.55 4.98 2.54 0-12.1
qA02-Llei-2013DH-14 13.21 0.57 5.70 4.16 10.3-18.0
qA09-Llei-2013DH-15# 69.51 0.58 7.23 3.71 68.9-70.8
qA09-Llei-2013DH-16# 77.81 1.05 13.51 9.28 76.6-80.8
qA09-Llei-2013DH-17# 83.41 0.92 12.34 6.68 81.4-88.0
qC01-Llei-2013DH-18 16.11 0.51 4.68 3.31 14.7-17.2
qC01-Llei-2013DH-19# 25.41 0.63 7.33 5.29 25.1-28.0
qC02-Llei-2013DH-20 4.01 -0.51 5.37 3.12 0-8.2

Table 7

Putative QTL for Llen detected in DH and IF2 populations"

QTL名称
QTL name		 位置
Position		 加性效应
Additive		 贡献率
R2 (%)		 LOD值
LOD score		 置信区间
Confidence interval
qA02-Llen-2010DH-1 38.11 -0.30 7.53 6.04 37.8-38.6
qA02-Llen-2010DH-2# 44.21 -0.33 9.51 7.88 43.4-44.9
qA08-Llen-2010DH-3 4.01 0.22 3.87 2.82 0-18.8
qA09-Llen-2010DH-4 68.51 0.25 5.60 4.59 68.1-69.7
qA09-Llen-2010DH-5 79.01 0.30 8.05 6.68 76.0-81.2
qC01-Llen-2010DH-6# 23.91 0.41 11.91 9.39 23.3-24.1
qC01-Llen-2010DH-7# 29.91 0.39 10.84 8.84 29.3-31.5
qC03-Llen-2010DH-8 17.61 0.20 2.86 2.62 13.3-20.8
qC06-Llen-2010DH-9 2.01 0.26 5.66 4.32 0-6.6
qC06-Llen-2010DH-10# 7.61 0.23 4.38 3.73 6.6-14.8
qA01-Llen-2011DH-11 63.01 -0.18 3.69 2.63 54.3-69.2
qA03-Llen-2011DH-12# 16.91 0.22 6.77 3.99 15.5-21.1
qA03-Llen-2011DH-13 27.11 0.21 5.95 4.52 25.2-29.0
qA04-Llen-2011DH-14 10.01 -0.16 3.52 2.72 0-20.4
qA05-Llen-2011DH-15 28.81 -0.24 7.92 5.81 25.8-33.1
qA05-Llen-2011DH-16 37.71 -0.18 4.65 3.34 35.5-39.7
qC01-Llen-2011DH-17# 23.91 0.21 4.82 3.61 22.8-24.5
qC01-Llen-2011DH-18 29.31 0.18 3.75 2.85 28.7-30.7
qC03-Llen-2011DH-19 4.01 -0.20 5.43 3.32 0-8.2
qC02-Llen-2011DH-20# 15.21 -0.21 6.32 4.49 9.7-22.8
qC06-Llen-2011DH-21# 7.61 0.17 3.76 2.99 6.6-18.8
qC01-Llen-2012DH-22# 23.61 0.30 6.96 3.23 17.4-23.9
qC01-Llen-2012DH-23# 29.91 0.34 9.16 4.68 28.0-31.1
qC01-Llen-2012DH-24 37.41 0.27 6.92 3.45 36.7-39.2
qC02-Llen-2012DH-25# 12.21 -0.26 6.89 2.73 8.2-14.2
qA02-Llen-2013DH-26# 43.41 -0.27 6.35 4.66 42.2-44.9
qA03-Llen-2013DH-27# 14.91 0.25 5.32 3.48 1.0-20.8
qC01-Llen-2013DH-28# 23.91 0.30 6.48 4.62 22.8-24.4
qC02-Llen-2013DH-29 5.01 -0.34 9.20 4.97 0.9-8.2
qC02-Llen-2013DH-30# 11.21 -0.30 8.07 4.83 8.2-16.9
qC02-Llen-2011IF2-31# 8.21 0.15 5.14 2.93 4.3-13.0
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