Improvement of rice eating quality and physicochemical properties by introgression of Wx in allele in indica varieties
YANG Yong1, LU Yan1,2, GUO Shu-Qing1, SHI Zhong-Hui1, ZHAO Jie1, FAN Xiao-Lei1, LI Qian-Feng1, LIU Qiao-Quan,1,*, ZHANG Chang-Quan,1,*1 Jiangsu Key Laboratory for Crop Genomics and Molecular Breeding / Key Laboratory of Plant Functional Genomics of Ministry of Education / Co-Innovation Center for Modern Production Technology of Grain Crops, Agricultural College of Yangzhou University, Yangzhou 225009, Jiangsu, China 2 Instrumental Analysis Center, Yangzhou University, Yangzhou 225009, Jiangsu, China
This study was supported by the National Key Research and Development Program of China.2016YFD0100501 the National Natural Science Foundation of China.31872860 the National Natural Science Foundation of China.31561143008 the Government of Jiangsu Province.BE2018357 the Government of Jiangsu Province.BK20160464 the Natural Science Foundation of the Jiangsu Higher Education Institutions of China.16KJB210011 the Open Research Fund of State Key Laboratory of Hybrid Rice(Hunan Hybrid Rice Research Center).2018KF04Hunan Hybrid Rice Research Center the Personnel Training Program for Undergraduates in Agricultural College of Yangzhou University
Abstract Nowadays, the Wx b allele has been widely used to improve grain quality of indica rice. However, some indica varieties carrying Wx b allele usually has a much softer texture, which is not favored by consumers in South China. So the grain quality of these varieties needs to be further improved. To understand the effect of Wx in allele on rice eating quality and physicochemical properties in indica rice, we developed two Near-Isogenic Lines (NILs) carrying Wx in and Wx b alleles by crossing an indica variety 3611 (receptor, carrying Wx a) with IR64 (carrying Wx in) and 9311 (carrying Wx b), and seven times of backcrossing based on molecular marker assistant selection (MAS). The Wx effects in controlling the synthesis of amylose, grain quality, and physicochemical properties were investigated. There were non-significant differences in the agronomic traits among the NILs. However, for grain quality characters, we found that the NIL(Wx in) rice showed significantly lower apparent amylose content (AAC) and higher gel consistency (GC), compared with the wild type 3611. Besides, the NIL(Wx b) rice showed the lowest AAC and highest GC among three lines. The NIL(Wx in) rice had a significantly higher taste value than the wild type 3611, while the NIL(Wx b) rice exhibited the highest taste value among the three samples. The granule-bound starch synthase I (GBSSI) level was the highest in 3611, moderate in NIL(Wx in) and lowest in NIL(Wx b), which showed a positive correlation with the AAC level. Also, the starch viscosity, thermal gelatinization property and crystal structure of different rice flours had a high correlation with the AAC level. To sum up, our results proved that both Wx in and Wx b allele can improve the grain quality in 3611 background, and what is more, the Wx in allele might be more useful for the improvement of grain quality in indica rice. Keywords:Oryza sativa L.;eating quality;Wx allele;apparent amylose content;molecular marker assisted selection
PDF (2760KB)元数据多维度评价相关文章导出EndNote|Ris|Bibtex收藏本文 本文引用格式 杨勇, 陆彦, 郭淑青, 石仲慧, 赵杰, 范晓磊, 李钱峰, 刘巧泉, 张昌泉. 籼稻背景下导入Wx in等位基因改良稻米食味和理化品质 [J]. 作物学报, 2019, 45(11): 1628-1637. doi:10.3724/SP.J.1006.2019.82064 YANG Yong, LU Yan, GUO Shu-Qing, SHI Zhong-Hui, ZHAO Jie, FAN Xiao-Lei, LI Qian-Feng, LIU Qiao-Quan, ZHANG Chang-Quan. Improvement of rice eating quality and physicochemical properties by introgression of Wx in allele in indica varieties [J]. Acta Crops Sinica, 2019, 45(11): 1628-1637. doi:10.3724/SP.J.1006.2019.82064
A图为利用QRM190分子标记区分Wxa和Wxb的PCR检测结果, 泳道1为3611, 2为9311, 3~7为近等基因系NIL(Wxb); B图为利用基因特异分子标记区分Wxa和Wxin的PCR检测结果, 泳道1为3611, 2为IR64, 3~7为近等基因系NIL(Wxin)。 Fig. 2Detection of specific molecular markers for different Wx alleles
(A): allelic specific molecular marker QRM190 for detecting Wxa and Wxb. Lanes 1-7: 3611, 9311 and their derived NIL NIL(Wxb) (lanes 3-7), respectively. (B): allelic specific molecular marker for detecting Wxa and Wxin. Lanes 1-7: 3611, IR64 and their derived NIL NIL(Wxin) (lanes 3-7), respectively.
M: 蛋白质分子质量标准; 1~2: 3611(Wxa); 3~4: NIL(Wxin); 5~6: NIL(Wxb); 箭头所示为60 kD的GBSSI蛋白。 Fig. 3SDS-PAGE analysis of the soluble (A) and bound (B) GBSS I isolated from mature rice of different NILs
Lane M: the protein standard molecular mass; Lanes 1-2: 3611(Wxa); Lane 3-4: NIL(Wxin); Lanes 5-6: NIL(Wxb); The arrows indicate the 60 kD GBSSI.
Table 2 表2 表2不同近等基因系稻米理化和外观品质 Table 2Appearance quality and physicochemical properties of different near-isogenic lines
品系 Line
表观直链淀粉含量 Apparent amylose content (%)
胶稠度 Gel consistency (mm)
食味值 Taste value
垩白粒率 Chalkiness rate (%)
垩白度 Chalkness degree (%)
3611(Wxa)
25.51±1.48 a
42.35±4.17 c
43.15±1.35 c
18.62±0.87 a
2.89±1.05 a
NIL(Wxin)
19.85±0.27 b
78.54±2.32 b
55.09±2.51 b
13.04±0.30 b
1.93±0.06 c
NIL(Wxb)
14.78±0.55 c
87.62±3.48 a
60.51±1.87 a
13.05±0.40 b
2.03±0.32 b
Values within the same column followed by different letters are significant different at P < 0.01 and n = 3. 同列标以不同小写字母的值差异极显著(P < 0.01), n = 3。
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