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Acta Agronomica Sinica ›› 2018, Vol. 44 ›› Issue (11): 1673-1680.doi: 10.3724/SP.J.1006.2018.01673

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

Mapping QTLs for Grain Shape, Flag Leaf Traits, and Plant Height in Rice Variety Mowanggu

Wei-Ye PENG1,Ping-Yong SUN2,Su-Jun PAN1,Wei LI1,Liang-Ying DAI1,*()   

  1. 1 College of Plant Protection, Hunan Agricultural University, Changsha 410128, Hunan, China
    2 State Key Laboratory of Hybrid Rice, Hunan Hybrid Rice Research Center, Changsha 410125, Hunan, China
  • Received:2018-03-27 Accepted:2018-07-20 Online:2018-11-12 Published:2018-07-30
  • Contact: Liang-Ying DAI E-mail:daily@hunau.net
  • Supported by:
    This study was supported by the National Key Research and Development Program of China(2016YFD0300700);the Natural Science Foundation of Hunan Province, China(2016JJ3071)

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Abstract:

In this study, 280 recombinant inbred lines (RIL) derived from a cross between japonica rice Mowanggu and indica CO39 were used to analyse correlations and detect QTLs for grain shape, flag leaf morphology and plant height in 2015 and 2016. The flag leaf length was significantly negatively and positively correlated with grain thickness and plant height, respectively. And there was a significant positive correlation between flag leaf width and grain width. Here, we identified 17 QTLs for grain shape traits distributed on chromosomes 1, 2, 3, 4, 5, 6, 7, 9, and 10 respectively, which could explain 3.51%-48.65% of total phenotypic variance. Among of them, the region between markers RM6080 and RM6283 on chromosome 3 significantly influenced both grain length and thousand-grain weight, while RM8211-RM3381 interval on chromosome 5 influenced both grain width and grain thickness. On the other hand, 12 QTLs controlling the flag leaf traits were identified on chromosomes 1, 3, 4, 6, 7, and 9, respectively, which explained 4.26%-38.40% of the phenotypic variance. In addition, five QTL regions showing pleiotropic effects were identified. For example, the marker RM252-SFP4_6 interval on chromosome 4 could control flag leaf length, flag leaf width, flag leaf area and grain length; and the RM257-RM3909 interval on chromosome 9 was responsible for flag leaf area and grain length. Furthermore, there was a major QTL controlling plant height was identified in the interval of RM6333-RM5536 on chromosome 1, which explained 28.76% of the phenotypic variance. All these results provide a foundation for fine mapping, cloning and marker assisted selection of favorable genes related to grain shape, flag leaf traits and plant height.

Key words: rice, grain shape, flag leaf, plant height, QTL mapping

Table 1

Phenotypic performance of nine agronomic traits in the recombinant inbred lines (RIL) population and their parents"

性状
Trait		 魔王谷
Mowanggu		 CO39 重组自交系RIL
均值±标准差
Mean±SD		 变幅
Range		 变异系数
CV (%)		 峰度
Kurtosis		 偏度
Skewness
粒长 GL (mm) 9.43** 7.98 8.49±0.76 6.87-10.28 8.95 -0.54 0.45
粒宽GW (mm) 4.39** 3.28 3.44±0.32 2.50-4.10 9.37 -0.03 -0.47
粒长宽比GL/GW 2.15 2.43 2.50±0.36 1.85-3.75 14.37 1.32 0.99
粒厚 GT (mm) 2.48** 2.07 2.11±0.14 1.72-2.59 6.71 -0.04 0.06
千粒重TGW (g) 39.54** 22.44 24.53±3.46 14.94-33.38 14.12 -0.41 0.05
剑叶宽FW (cm) 2.50** 1.49 1.90±0.38 1.22-3.20 20.16 0.58 0.76
剑叶长FL (cm) 35.61 32.40 40.36±8.82 22.50-74.00 21.87 0.93 0.77
剑叶长宽比FL/FW 14.25** 21.79 21.88±5.67 11.67-44.40 25.92 1.35 0.97
株高 PH (cm) 143.30** 91.33 128.69±19.74 83.90-186.33 15.34 -0.19 0.38

Table 2

Correlation coefficients of nine agronomic traits in the RIL"

性状
Trait		 粒长
GL		 粒宽
GW		 长宽比GL/GW 粒厚
GT		 千粒重
TGW		 剑叶宽
FW		 剑叶长
FL		 剑叶长宽比
FL/FW
粒宽GW -0.09
粒长宽比GL/GW 0.70** -0.76**
粒厚 GT 0.01 0.69** -0.47**
千粒重TGW 0.56** 0.42** 0.06 0.59**
剑叶宽FW -0.14* 0.23** -0.23** 0.06 0.01
剑叶长FL -0.01 -0.03 0.01 -0.21** -0.09 0.25**
剑叶长宽FL/FW 0.10 -0.19** 0.18** -0.21** -0.08 -0.53** 0.67**
株高 PH -0.05 0.07 -0.09 -0.04 0.05 0.06 0.34** 0.23**

Table 3

QTLs for grain shape, flag leaf traits and plant height detected in Mowanggu/CO39 F8 population"

性状
Traita		 QTL 染色体
Chr.		 标记区间
Marker interval		 LOD 值
LOD scores		 贡献率
R2(%)		 加性效应1)
Additive 1)
粒长
GL		 qGL3 3 RM6080-RM6283 29.60 48.65 0.57
qGL4 4 RM252-SFP4_6 3.27 5.25 -0.17
qGL9 9 RM257-RM3909 3.04 3.57 0.14
粒宽
GW		 qGW1 1 RM5536-RM6840 4.07 6.51 0.08
qGW2 2 RM263-RM6366 4.42 6.02 0.08
qGW3 3 RM3134-RM1284 10.06 17.38 0.14
qGW5-1 5 RM8211-RM3381 4.19 13.41 -0.12
qGW5-2 5 RM1237-RM405 10.51 25.86 0.16
qGW6 6 RM527- SFP6_2 2.75 3.51 0.05
粒厚
GT		 qGT1 1 RM3627-RM3475 5.05 10.47 0.05
qGT2 2 RM3732-RM7082 3.95 5.62 0.04
qGT3 3 RM5474-RM3392 11.06 17.51 0.06
qGT5 5 RM8211-RM3381 2.76 4.88 0.03
qGT10 10 RM258-RM8201 3.64 11.43 0.05
千粒重
TGW		 qTGW1 1 RM6333-RM5536 4.06 8.78 1.05
qTGW3 3 RM6080-RM6283 10.71 24.05 1.78
qTGW7 7 RM8261-RM5720 3.88 7.87 0.99
剑叶长
FL		 qFL1 1 RM220-RM582 4.23 9.99 -2.74
qFL4 4 RM252-SFP4_6 2.64 4.82 1.92
qFL6 6 RM225-SFP6_1 2.84 5.69 2.08
qFL7 7 RM1134-RM5672 5.37 9.60 2.98
剑叶宽
FW		 qFW1 1 RM5389-RM6333 5.60 8.24 -0.11
qFW3 3 RM3564-RM5548 6.79 13.06 0.14
qFW4 4 RM252-SFP4_6 18.68 38.40 0.24
剑叶面积
FA		 qFA1 1 RM220-RM582 5.70 16.14 -7.55
qFA3 3 RM3564-RM5548 4.11 7.73 5.20
qFA4 4 RM252-SFP4_6 10.74 20.02 8.38
qFA6 6 RM225-SFP6_1 3.44 6.48 4.79
qFA9 9 RM257-RM3909 2.99 4.26 -3.94
株高 PH qPH1 1 RM6333-RM5536 9.77 28.76 10.64

Fig. 1

Distribution of QTLs detected in this study in the RIL population and the cloned QTLs Sd1, Nal1, GS3, GS5, qSW5, and PGL1 are QTLs cloned by other researchers."

Table 4

Comparison of QTLs responsible for grain shape, flag leaf traits, and plant height traits between references and this study"

性状
Trait		 染色体
Chr.		 本研究定位区间
Interval in this study		 参考文献定位区间
Interval in reference		 克隆的基因
Cloned gene		 参考文献
Reference
粒长 GL 3 RM6080-RM6283 GS63-SF19 GS3 Fan et al.[2]
粒宽 GW 3 RM3134-RM1284 C1488-R663 — Zhou et al.[22]
5 RM8211-RM3381 S2-RM574 GS5 Li et al.[6]
5 RM8211-RM3381 MS40671-M16 qSW5 Ayahiko et al.[5]
5 RM8211-RM3381 RM169-RM1237 — Zhang et al.[23]
粒厚 GT 1 RM3627-RM3475 RM11169-RM 1183 — Dong et al.[24]
10 RM258-RM8201 C1488-R663 — Zhou et al.[22]
剑叶宽 FW 3 RM3564-RM5548 RM7000-RM514 — Luo et al.[25]
4 RM252-SFP4_6 M3-M4 Nal1 Qi et al.[10]
剑叶面积FA 1 M220-RM582 RM490-RM243 — Jiang et al.[26]
1 M220-RM582 RM490-RM 243 — Tong et al.[27]
1 M220-RM582 RM259-RM 243 — Peng et al.[28]
株高 PH 1 RM6333-RM5536 RG220-R2414 Sd1 Sasaki et al.[12]; Spielmeyer et al.[13]; Monna et al.[14]
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