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基于3种方法的西南杂交籼稻稻米食味评价及品种优选

本站小编 Free考研考试/2021-12-26

卢慧,1, 袁玉洁1, 张丝琪1, 陈虹1, 陈多1, 钟晓媛1, 李博1, 邓飞1, 陈勇1, 李贵勇2, 任万军,11四川农业大学/农业部西南作物生理生态与耕作重点实验室,四川温江 611130
2云南省农业科学院粮食作物研究所,昆明 650200

Evaluation of Rice Eating Quality and Optimization of Varieties of Southwest Indica Hybrid Rice Based on Three Taste Evaluation Methods

LU Hui,1, YUAN YuJie1, ZHANG SiQi1, CHEN Hong1, CHEN Duo1, ZHONG XiaoYuan1, LI Bo1, DENG Fei1, CHEN Yong1, LI GuiYong2, REN WanJun,11Sichuan Agricultural University/Crop Ecophysiology and Cultivation Key Laboratory of Sichuan Province, Wenjiang 611130, Sichuan
2Institute of Food Crops of Yunnan Academy of Agricultural Sciences, Kunming 650200

通讯作者: 任万军,E-mail:rwjun@126.com

责任编辑: 赵伶俐
收稿日期:2020-06-30接受日期:2020-09-3网络出版日期:2021-03-16
基金资助:国家粮食丰产增效科技创新专项.2016YFD03005-06
国家粮食丰产增效科技创新专项.2018YFD030141-04
四川省育种攻关项目.2016NYZ0051


Received:2020-06-30Accepted:2020-09-3Online:2021-03-16
作者简介 About authors
卢慧,E-mail:luhui@stu.sicau.edu.cn













摘要
【目的】基于现有3种稻米食味评价方法,研究西南稻区不同杂交籼稻品种食味品质特点,并优选出优良食味杂交籼稻品种。【方法】在2017年品种筛选试验的基础上,于2018年在云南永胜和四川大邑分别采用单因素随机区组田间试验,应用2种国标感官评价和食味计进行评价,比较分析20个杂交籼稻品种的食味品质差异及其对食味评价方法的响应。【结果】稻米食味品质受多种因素共同调控,食味优良的品种具有在2种感官评价下稻米的气味、外观、适口性、滋味和冷饭质地,以及食味计评价下的外观和口感评分均优良的共性,进而具有较高的食味品质。通径分析表明,适口性对食味贡献率最大,滋味和外观次之,冷饭质地最低。不同品种间稻米食味品质差异明显。3种评价方法下,宜香优2115、内5优39、繁优609、花香优1618、川优6203和隆两优1146在2生态点均具有优良食味品质。相较于绿优4923和川优8377等低食味品种,宜香优2115和花香优1618等品种具有较高的气味、外观、适口性、滋味,进而食味较好。品种对不同评价方法的响应存在差异,永胜渝香203和大邑Y两优1号在2种感官评价下均属于低食味品种,但在食味计评价下则显著高于食味计平均食味。线性拟合结果表明,感官百分制评分和等级综合评分线性拟合度高,相关系数r=0.94***,而食味计评分与感官百分制评分和等级综合评分相关系数分别为r=0.49***r=0.53***,离散程度较大,不足以解释相互之间关系。【结论】稻米食味品质受生态条件和品种共同作用,采用单一食味评价方法不能准确评价各品种稻米食味品质。因此,综合运用3种现行食味评价方法,筛选出宜香优2115、内5优39、繁优609、花香优1618、川优6203和隆两优1146等6个食味优良且稳定的品种,可以用作西南优质食味品种推广。
关键词: 水稻;食味品质;评价方法;食味计;感官评价

Abstract
【Objective】 Based on the three existing taste evaluation methods, the aim of this study was to research the eating quality characteristics of different indica hybrid rice varieties, and to select the excellent taste indica hybrid rice varieties in Southwest China. 【Method】 Based on the variety screening test in 2017, a single-factor randomized block field experiment was conducted in Yongsheng and Dayi in 2018. The eating quality was evaluated by two national standard sensory evaluation methods and taste analyzer for comparing the response of indica hybrid rice to sensory evaluation method, and the differences were compared among the 20 rice varieties. 【Result】 The eating quality of rice was regulated by multiple factors, the varieties with good taste had common characteristics, including excellent aroma, appearance, palatability, flavor and cold rice texture under the two sensory evaluations, as well as the appearance and taste value under the taste analyzer evaluation, and consequently to better eating quality. The path analysis showed that palatability had the highest contribution, followed by flavor and appearance, and the cold rice texture was the lowest. There were obvious differences in the eating quality of rice among different varieties. Under the three evaluation methods, Yixiangyou 2115, Nei 5 you 39, Fanyou 609, Huaxiangyou 1618, Chuanyou 6203 and Longliangyou 1146 all had excellent eating quality at 2 eco-points. Compared with Lüyou 4923 and Chuanyou 8377, Yixiangyou 2115 and Huaxiangyou 1618 had higher aroma, appearance, palatability, flavor, and consequently to higher eating quality. There were differences in the response of varieties to different evaluation method. Yuxiang 203 at Yongsheng and Y Liangyou 1 hao at Dayi belonged to poor taste varieties under 2 sensory evaluations, whereas both of them significantly higher than average under the evaluation of taste analyzer. The linear fitting results showed that the sensory hundred percentage point system (SHP) and the comprehensive grade rating (CGR) had a high linear fit, the correlation coefficient was r=0.94***, the correlation coefficients of the taste analyzer value (TAV) to SHP and CGR were r=0.49 *** or r=0.53 ***, respectively, and the degree of dispersion was too large to fully explain the internal relationship between each other. 【Conclusion】 The eating quality of rice was affected by ecological conditions and varieties. However, using a single taste evaluation method could not accurately evaluate the eating quality of rice varieties. Therefore, 6 varieties with good and stable taste, including Yixiangyou 2115, Nei 5 you 39, Fanyou 609, Huaxiangyou 1618, Chuanyou 6203 and Longliangyou1146, were selected by comprehensive used of the three current taste evaluation methods, which could be promoted as the high-quality taste varieties in Southwest China.
Keywords:rice;eating quality;evaluation method;taste analyzer;sensory evaluation


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本文引用格式
卢慧, 袁玉洁, 张丝琪, 陈虹, 陈多, 钟晓媛, 李博, 邓飞, 陈勇, 李贵勇, 任万军. 基于3种方法的西南杂交籼稻稻米食味评价及品种优选[J]. 中国农业科学, 2021, 54(6): 1243-1257 doi:10.3864/j.issn.0578-1752.2021.06.014
LU Hui, YUAN YuJie, ZHANG SiQi, CHEN Hong, CHEN Duo, ZHONG XiaoYuan, LI Bo, DENG Fei, CHEN Yong, LI GuiYong, REN WanJun. Evaluation of Rice Eating Quality and Optimization of Varieties of Southwest Indica Hybrid Rice Based on Three Taste Evaluation Methods[J]. Scientia Acricultura Sinica, 2021, 54(6): 1243-1257 doi:10.3864/j.issn.0578-1752.2021.06.014


开放科学(资源服务)标识码(OSID):

0 引言

【研究意义】稻米食味不仅受遗传特性影响[1,2],还受水稻生长气候环境调控,也因品尝员食味嗜好差异而有区别[3,4,5]。随着人民生活质量的提高,优质稻米供需矛盾日益突出。西南作为全国最典型杂交籼稻种植和消费区域,急需推进杂交籼稻食味品质研究以满足快速增长的市场需求。【前人研究进展】稻米品质由于遗传多样性而复杂多样,前人就品质相关基因进行了较多研究,Wx作为控制表观直链淀粉含量、胶稠度和淀粉粘滞性特征谱(RVA)的主效基因对食味有着重要影响[6,7],除此之外,还受到栽培措施[8,9]、气象因子[10,11]等多方面共同调控。目前品质研究多集中在理化指标与品质关系,前人研究表明,优质食味稻米的蛋白质含量在6.5%—7.5%、直链淀粉含量低于16.5%、消减值在25 RVU以下[12],但理化指标的测定改变了大米的物理结构,且大米在煮成米饭的过程中已经发生了质变,不能完全代替复杂的感官。对此,研究者进行了粳稻食味与产量[13,14]、蒸煮方式[15]、食味评价方式[16,17,18]等关系的研究,且日本在基于理化指标和感官食味的基础上研发出食味计[19],能够快速高效地测量粳稻食味品质。【本研究切入点】对影响稻米食味因素、食味评价方式等已有较多研究[20,21],但西南一季中籼杂交稻区品质研究主要集中在气候条件[22,23]、栽培方式[24]、理化指标[25,26]等方面,关于运用不同食味评价方法准确评价杂交籼稻食味的应用还鲜见报道。【拟解决的关键问题】在前期进行品种筛选研究[27]的基础上,以筛选出的20个具有代表性的杂交籼稻品种在云南永胜和四川大邑实施田间试验,利用国内现行的感官百分制评分、感官等级综合评分和日本米饭食味计进行食味评价,以明确西南杂交籼稻品种的食味品质差异,并优选出优良食味杂交籼稻品种,为西南稻区杂交籼稻优质食味育种和栽培提供理论依据。

1 材料与方法

1.1 试验地点与材料

试验于2018年在云南永胜和四川大邑两个生态点进行,永胜试验田基础地力为:pH 6.71,有机质31.98 g·kg-1,全氮1.98 g·kg-1,碱解氮144.11 mg·kg-1,全磷0.92 g·kg-1,速效磷23.10 mg·kg-1,全钾10.36 g·kg-1,速效钾213.28 mg·kg-1;大邑试验田:pH 5.48,有机质 35.24 g·kg-1,全氮3.05 g·kg-1,全磷0.61 g·kg-1,全钾3.51 g·kg-1,碱解氮96.31 mg·kg-1,速效磷26.32 mg·kg-1,速效钾105.28 mg·kg-1。生育期内气象数据见图1,供试品种见表1

图1

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图12018年永胜、大邑生态点气象数据

YS:云南永胜;DY:四川大邑,下同
Fig. 1Meteorological data of Yongsheng County and Dayi County in 2018

DY: Dayi County, Sichuan Province, YS: Yongsheng County, Yunnan Province. The same as below


Table 1
表1
表1供试杂交籼稻品种信息和米质等级
Table 1Variety information and rice quality grade of the tested Hybrid Indica Rice
品种
Variety
亲本
Parent
米质
Rice quality grade
品种
Variety
亲本
Parent
米质
Rice quality grade
宜香4245
Yixiang 4245
宜香1A×宜恢4245
Yixiang 1A×Yihui 4245
三级
Grade Ⅲ
花香优1618
Huaxiangyou 1618
花香A×川恢1618
Huaxiang A×Chuanhui 1618
三级
Grade Ⅲ
内5优39
Nei 5 you 39
内香5A×内恢2539
Neixiang 5 A×Neihui2539
二级
Grade Ⅱ
绿优4923
Lüyou 4923
绿5 DF 1A×绿恢 4923
Lü5DF1 A×Lühui 4923
三级
Grade Ⅲ
Y两优1号
Y liangyou 1 hao
Y58S×9311
Y58S×9311
三级
Grade Ⅲ
中优295
Zhongyou 295
中9A×禾恢295
Zhong 9 A×Hehui 295
三级
Grade Ⅲ
川优6203
Chuanyou 6203
川106A×成恢3203
Chuan 106 A×Chenghui3203
二级
Grade Ⅱ
隆两优1146
Longliangyou 1146
隆科638S×华恢1146
Longke 638 S×Huahui 1146
三级
Grade Ⅲ
晶两优534
Jingliangyou 534
晶4155S×R534
Jing 4155S×R534
三级
Grade Ⅲ
F优498
F you 498
江育F32A×蜀恢498
Jiangyu F 32 A×Shuhui 498
三级
Grade Ⅲ
旌优127
Jingyou 127
旌香1A×成恢727
Jingxiang 1 A×Chenghui 727
二级
Grade Ⅱ
中9优2号
Zhong 9 you2 hao
中9A×红恢2号
Zhong 9 A×Honghui 2 hao
三级
Grade Ⅲ
渝香203
Yuxiang 203
宜香1A×渝恢2103
Yixiang 1 A×Yuhui2103
二级
Grade Ⅱ
蜀优217
Shuyou 217
蜀21A×成恢727
Shu 21 A×Chenghui 727
——
繁优609
Fanyou 609
繁源A×帮恢609
Fanyuan A×Banghui 609
二级
Grade Ⅱ
宜香优2115
Yixiangyou 2115
宜香1A×雅恢2115
Yixiang 1 A×Yahui 2115
二级
Grade Ⅱ
C两优华占
Cliangyouhuazhan
C815S×华占
C815S×Huazhan
三级
Grade Ⅲ
川优8377
Chuanyou 8377
川358A×成恢377
Chuan 358 A×Chenghui 377
一级
Grade Ⅰ
天优华占
Tianyouhuazhan
天丰A×华占
Tianfeng A×Huazhan
三级
Grade Ⅲ
渝优7109
Yuyou 7109
渝802A×渝恢7109
Yu 802A×Yuhui 7109
三级
Grade Ⅲ

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1.2 试验设计

各试验点采用品种单因素随机区组设计,设置3次重复,共60个小区。小区面积均为19.8 m2(长11 m,宽1.8 m)。采用大田硬盘(规格为58 cm×28 cm×2.5 cm)旱育毯苗秧,大邑4月3日播种,5月3日移栽,30 d秧龄;永胜4月8日播种,5月13日移栽,35 d秧龄。插秧机调行穴距为30 cm×20 cm,栽后3 d定苗,每穴3苗。施纯氮180 kg·hm-2,按基肥﹕蘖肥=7﹕3施用。按N﹕P2O5﹕K2O=2﹕1﹕2确定磷、钾肥施用量,磷肥作基肥一次性施用,钾肥按基肥﹕分蘖肥=5﹕5的比例施用。水分管理及病虫、草害防治等相关栽培措施均按照当地常规高产栽培要求实施。

1.3 测定项目与方法

感官评价按照中华人民共和国国家标准《GB/ T15682-2008粮油检验 稻谷、大米蒸煮食用品质感官评价方式》中的两个评分方法,a将评价方法1定义为“感官百分制评分”;b将评价方法2定义为“等级综合评分”,等级分为“-3、-2、-1、0、1、2、3”,其中,适口性考察品尝员主观喜好,数据统计时,剔除与平均值超过2个等级的打分;c食味计值测定采用日本佐竹公司生产食味计(STA-1A型)测定米饭食味值,本文定义为“食味计评分”。

1.3.1 样品前处理 成熟收获时各小区按照四分法选取试验样品约2 kg放在网袋中,晒至安全水分后,稻谷统一储存在四川农业大学成都校区,在室温下保存3个月,待其理化性质趋于稳定后,使用6N80型碾米机碾精,FOS-130型碎米分离器分离加工成国家标准一等精度的大米备用。3种评价方法的米饭制备过程一致,称取30±0.1 g制备好的整精米于食味计罐中,加水浸泡,使用食味计冲水管冲洗30 s,加入48 g蒸馏水(米水比为1﹕1.6),浸泡30 min,然后在蒸饭锅中蒸煮30 min,对米饭进行轻轻的上下翻动,焖10 min后进行国标中百分制评分和等级综合评分;食味计评分在焖饭之后需在冷却装置中吹20 min,在室温下放置2 h后进行上机测定,称取约7 g米饭压制成饭饼,测定食味,正反面各测一次,设置3次平行,平行之间食味计值相差5分以上则重测。

1.3.2 品尝员 参照国标《GB/T 16291.1-2012感官分析 选拔、培训与管理评价员一般导则 第1部分:优选评价员》的原则,严格筛选培训20名在校大学生作为品尝员,他们来自全国多个省份,且全部以大米为主食。

1.3.3 基准米 根据国标要求,通过优选品尝员的3次重复品尝,四川种植的天优华占综合评分为75分左右。同时,该品种种植面积大,自审定以来累计推广超过1.5×106 hm2,且品质稳定,因此以其作为对照品种。

1.4 数据统计分析

采用Microsoft Excel 2016整理和计算数据,运用SPSS数据处理系统进行数据分析,用OriginLab 2018作图。

2 结果

2.1 不同杂交籼稻品种稻米食味品质的差异分析

2.1.1 感官百分制评分下稻米食味品质差异 由表2可知,在感官百分制评分下稻米食味品质受品种和生态条件共同作用。冷饭质地受生态点主效影响不显著外,稻米气味、外观、适口性、滋味和百分制评分均受生态点和品种主效极显著影响,二者互作极显著影响气味、外观、适口性和百分制食味评分。永胜生态点稻米食味品质明显优于大邑生态点,其气味、外观、适口性、滋味和百分制评分分别较大邑生态点显著增高1.20%、7.54%、3.78%、2.74%和3.45%。不同品种间稻米气味、外观、适口性、滋味和百分制评分差异显著,其中,冷饭质地变异系数最大,外观变异系数次之。生态点与品种互作下,永胜生态点的花香优1618和宜香优2115百分制评分显著提高,两品种具有较高气味、外观、适口性、滋味、冷饭质地;渝香203具有较低的稻米气味、外观和适口性,进而导致百分制评分明显低于其他品种。在大邑生态点,隆两优1146气味、外观、适口性、滋味、冷饭质地提高,宜香优2115通过较高的气味、滋味、冷饭质地而提高了百分制评分;Y两优1号气味、外观、适口性、滋味显著降低,而导致百分制评分显著低于其余品种,说明在百分制评分下食味好的品种,具有气味、外观、适口性、滋味、冷饭质地优异的共性,食味差的品种也具有气味、外观、适口性、滋味、冷饭质地差的一致性。

Table 2
表2
表2基于感官百分制评分稻米食味品质及食味指标的差异分析
Table 2The difference analysis of rice eating quality and taste index based on sensory hundred percentage point system
品种
Variety
气味
Aroma
外观
Appearance
适口性
Palatability
滋味
Flavor
冷饭质地
Cold rice texture
感官百分制评分
SHP
永胜 YS大邑 DY永胜 YS大邑 DY永胜 YS大邑 DY永胜 YS大邑 DY永胜 YS大邑 DY永胜 YS大邑 DY
宜香4245
Yixiang 4245
18.37bc17.76b16.57bcde14.01ef23.24bcde21.66b19.61abc19.15bcde3.74def3.75cdef81.52bc76.55def
内5优39
Nei 5 you 39
17.42ghij17.01cdef16.98abc14.24def23.37bcd21.52b19.44bc19.04bcde3.97bcd3.86bcd81.19bcde75.95defg
Y两优1号
Y liangyou 1 hao
17.30hijk16.48f15.79fgh12.46g22.48defg21.57b19.07bc18.13f3.67defg3.79bcdef78.35fg72.65h
川优6203
Chuanyou 6203
17.83defg16.97def16.28def15.34bcd23.20bcdef22.44b19.61abc19.03bcde3.63defg4.1abc80.63cde78.1bcde
晶两优534
Jingliangyou 534
17.51fghij16.84ef16.62bcd13.85f23.68abc21.84b19.85ab18.54def3.75def3.78bcdef81.23bcd75.2fg
旌优127
Jingyou 127
18.03cde17.75b16.38cdef14.38def22.86cdefg21.66b19.75abc18.93bcdef3.62defg3.72cdefg80.43cde76.41def
渝香203
Yuxiang 203
16.84k17.48bcde14.32j14.57cdef20.19i21.78b18.87cd19.13bcde3.82cdef3.83bcde73.68i77.16cdef
繁优609
Fanyou 609
18.19cd17.65bcd17.17ab16.35b23.35bcde21.71b20.32a19.64abc3.91bcde3.92bc82.6b79.57bc
C两优华占
C liangyouhuazhan
17.25ijk17.15bcdef15.18hi14.78cdef22.93cdefg21.69b19.58abc18.85cdef3.75def3.85bcde78.67fg76.38def
天优华占
Tianyouhuazhan
17.51fghij16.87ef15.87fg15.01cdef22.77cdefg20.97b19.54abc18.51def3.42fgh3.24hi78.95fg75.27fg
花香优1618
Huaxiangyou 1618
18.65ab18.39a17.57a13.85f24.11ab21.29b20.35a19.15bcde4.38a4.18ab85.27a77.09cdef
绿优4923
Lüyou 4923
17.26ijk17.04cdef14.42j12.76g22.18fg21.81b18.19d18.32ef3.17hi3.44efghi75.12h73.44gh
中优295
Zhongyou 295
17.93cdef17.42bcde16.25def15.70bc23.14bcdefg22.15b19.23bc18.59def3.31ghi3.08i79.69ef77.11cdef
隆两优1146
Longliangyou 1146
17.55efghij18.89a16.63bcd18.09a23.39bcd24.79a19.79ab20.11a4.18abc4.44a81.79bc86.2a
F优498
F you498
17.46fghij17.21bcde15.92efg15.09cde22.46defg21.57b19.45bc18.75def3.51efgh3.33ghi78.84fg75.99defg
中9优2号
Zhong 9 you2 hao
17.68efghi17.58bcd14.61ij15.75bc22.12g22.44b19.41bc19.14bcde3.51efgh3.51defgh77.59g78.47bcd
蜀优217
Shuyou 217
17.78defgh17.57bcd15.99defg17.63a22.64cdefg22.31b19.58abc19.19bcd3.68defg3.44efghi79.74def77.45cdef
宜香优2115
Yixiangyou 2115
18.93a18.46a17.22ab14.99cdef24.59a22.73b20.37a19.72ab4.24ab4.18ab85.47a80.28b
川优8377
Chuanyou 8377
17.15jk17.68bc14.09j14.14ef21.21h21.68b18.98bc19.17bcde2.97i3.20hi74.71hi76.07def
渝优7109
Yuyou 7109
17.66efghi17.69bc15.57gh13.95ef22.31efg21.95b19.31bc18.67def3.75def3.39fghi78.66fg75.66efg
均值 Mean17.71A17.50B15.97A14.85B22.81A21.98B19.51A18.99B3.70A3.70A79.71A77.05B
变幅Range16.84-18.9316.48-18.8914.09-17.5712.46-18.0920.19-24.5920.97-24.7918.19-20.3718.13-20.112.97-4.383.08-4.4473.68-85.4772.65-86.2
CV (%)2.933.396.349.424.253.552.672.519.289.893.843.64
双因素方差分析的 P 值 P values of two-ways ANOVA
生态点Location0.000***0.000***0.000***0.000***0.940.000***
品种Variety0.000***0.000***0.000***0.000***0.000***0.000***
生态点×品种
Location × Variety
0.000***0.000***0.000***0.0580.1910.000***
同列中不同小写字母表示差异达5%显著水平,均值后大写字母表示两个生态点5%显著水平。*、**、***分别表示为0.05、0.01、0.001水平显著。下同
SHP:感官百分制评分;CV:变异系数
Values followed by different lowercase letters within the same column indicate significant differences at 5% level. The capital letters after the mean value indicate the 5% significant level of the two ecological points. *, **, *** indicate P<0.05, P<0.01, P<0.001, respectively. The same as below
SHP: Sensory hundred percentage point system, CV: Coefficient of variation

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2.1.2 等级综合评分下稻米食味品质差异 由表3可以看出,生态点主效对冷饭质地影响不显著,但与品种主效分别极显著影响稻米气味、外观、适口性、滋味、等级综合评分食味值;二者互作极显著影响气味、外观、适口性、滋味和等级综合评分食味值,而对冷饭质地没有显著影响。大邑相较于永胜的品种气味、外观、适口性、滋味、冷饭质地和等级综合评分食味值均显著降低,外观指标尤为显著,其次为等级综合评分食味值,两生态点品种气味和冷饭质地相当。根据变异系数来看,等级综合评分变异系数最大,其次为气味、外观、适口性。在生态点和品种互作下,永胜宜香优2115、花香优1618具有较高气味、外观、适口性、滋味和冷饭质地,繁优609具有较高外观、适口性和冷饭质地,进而显著提高了永胜生态点的品种等级综合评分,渝香203气味、外观、适口性、滋味、冷饭质地则显著降低而导致等级综合评分低于其余品种。在大邑生态点,隆两优1146气味、外观、适口性、滋味、冷饭质地显著提高而使等级综合评分显著提高;绿优4923气味、外观、适口性、滋味和冷饭质地显著降低进而使等级综合评分显著降低。

Table 3
表3
表3基于等级综合评分稻米食味品质及食味指标的差异分析
Table 3The difference analysis of rice eating quality and taste index based on comprehensive grade rating
品种
Variety
气味
Aroma
外观
Appearance
适口性
Palatability
滋味
Flavor
冷饭质地
Cold rice texture
等级综合评分
Comprehensive grade rating
永胜 YS大邑 DY永胜 YS大邑 DY永胜 YS大邑 DY永胜 YS大邑 DY永胜 YS大邑 DY永胜 YS大邑 DY
宜香4245
Yixiang 4245
0.74abc0.61ab0.61bcd-0.97i0.61abcd0.27bcd0.45bcd0.22bcde0.85abc0.75abcd1.14bcd0.19bcde
内5优39
Nei 5 you 39
0.11fgh-0.05efghi0.61bcd-0.77hi0.76abc0.31bcd0.39bcd0.26bcd1.04a0.85abc0.78cdef0.08bcde
Y两优1号
Y liangyou 1 hao
-0.04fgh-0.18ghi-0.01f-1.41j0.60adcd0.31bcd0.12de-0.28def0.79abc0.62bcde0.28efgh-0.95f
川优6203
Chuanyou 6203
0.61bcde0.21cdef0.33de-0.04cde0.44bcde0.56abc0.42bcd0.37bcd0.66abcd0.86abc0.70cdef0.49bcd
晶两优534
Jingliangyou 534
0.18efgh0.10defgh0.55bcd-0.84hi0.79abc0.39bcd0.64b0.11cdef0.81abc0.89abc1.01bcde-0.31cdef
旌优127
Jingyou 127
0.39cdef0.44bcd0.55bcd-0.52fgh0.52abcd0.08bcd0.54bc0.21bcde0.75abcd0.50bcdef0.79cdef0.06bcde
渝香203
Yuxiang 203
-0.22h0.22cde-0.65g-0.54fgh-0.46fg0.59ab0.11de0.44abc0.88ab0.89abc-0.74i0.26bcde
繁优609
Fanyou 609
0.64bcd0.52abc0.81ab0.38b0.68abcd0.48bc0.70b0.87a0.91ab0.82abc1.36abc0.87b
C两优华占
C liangyouhuazhan
0.08fgh0.17cdefg0.04ef-0.38efg0.49bcd0.17bcd0.34bcde0.24bcd0.75abcd0.8abc0.55defg0.09bcde
天优华占
Tianyouhuazhan
0.22defgh0.22cde0.45bcd0.25bc0.30bcde-0.22cd0.42bcd0.35bcd0.67abcd-0.03fg0.61defg0.37bcde
花香优1618
Huaxiangyou 1618
0.85ab0.39bcd1.02a-0.93i0.84ab-0.20bcd0.66b-0.10def1.16a1.04ab1.64ab-0.39cdef
绿优4923
Lüyou 4923
-0.08gh-0.25hi-0.44g-1.31j-0.23efg-0.33d-0.43f-0.38f0.01ef0.12efg-0.7i-1.07f
中优295
Zhongyou 295
0.32cdefg-0.18fghi0.55bcd0.14bcd0.08cdef-0.14bcd-0.02e-0.37f0.14def-0.19g0.23fgh-0.11bcdef
隆两优1146
Longliangyou 1146
0.08fgh0.83a0.41cd1.19a0.67abcd1.21a0.36bcde0.70ab0.88ab1.26a0.81cdef1.92a
F优498
F you498
0.04fgh-0.33i0.41cd-0.21def0.01defg-0.33d0.16cde-0.10def0.22cdef0.18efg-0.05ghi-0.61ef
中9优2号
Zhong 9 you 2 hao
0.10fgh0.24cde-0.33g0.09bcd0.04def0.17bcd0.06de0.43abc0.37bcde0.34cdefg-0.18hi0.41bcd
蜀优217
Shuyou 217
0.20defgh-0.11efghi0.75abc-0.19def0.39bcde-0.15bcd0.40bcd0.22bcde0.34bcdef0.24defg0.68cdefg-0.2cdef
宜香优2115
Yixiangyou 2115
1.14a0.64ab0.99a-0.65ghi1.21a0.33bcd1.09a0.47abc1.29a1.00ab1.91a0.61bc
川优8377
Chuanyou 8377
-0.06fgh-0.04efghi-0.42g-0.49fgh-0.65g-0.33d0.06de0.17cde-0.26f-0.01fg-0.63i-0.38cdef
渝优7109
Yuyou 7109
0.20defgh0.17cdefg0.37de-0.84hi0.45bcde-0.16bcd0.52bc-0.1def0.66abcd0.11efg0.65cdefg-0.54def
均值 Mean0.27A0.18B0.33A-0.40B0.38A0.15B0.35A0.19B0.65A0.55A0.54A0.04B
变幅Range-0.22-1.14-0.33-0.83-0.65-1.02-1.41-1.19-0.65-1.21-0.33-1.21-0.43-1.09-0.38-0.87-0.26-1.29-0.19-1.26-0.74-1.91-1.07-1.92
CV (%)128.76177.41145.65155.25122.15262.4592.92178.2561.0376.57135.071717.79
双因素方差分析的 P 值 P values of two-ways ANOVA
生态点Location0.023*0.000***0.002**0.000***0.1080.000***
品种Variety0.000***0.000***0.000***0.000***0.000***0.000***
生态点×品种
Location × Variety
0.000***0.000***0.004**0.000***0.50.000***

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2.1.3 食味计评分下稻米食味品质差异 据表4可知,外观、口感与食味计值受到品种、生态点主效以及两者互作显著或极显著影响。永胜生态点品种食味显著高于大邑;和永胜相比,大邑生态点品种外观、口感和食味计值分别显著降低了9.76%、5.37%、1.91%,大邑生态点内5优39、宜香优2115等13个品种食味值低于永胜,外观和口感的降低而导致这些品种食味计值较低。两生态点各品种的变异系数以外观最大分别为10.46、9.21,其次为口感和食味计值。在生态点和品种互作下,永胜生态点内5优39、繁优609和花香优1618品种由于较高外观和口感而显著提高了食味计值;绿优4923、川优8377和蜀优217外观和口感降低从而显著降低了食味计值。在大邑生态点,内5优39、繁优609、花香优1618、宜香优2115外观、口感和食味计值优于其余品种;食味较差品种绿优4923、中优295、川优8377的外观、口感较差而显著降低了食味计值。

Table 4
表4
表4基于食味计评分稻米食味品质及食味指标的差异分析
Table 4The difference analysis of food taste quality and taste index based on the taste analyzer
品种
Variety
外观Appearance口感Taste食味计值 Taste analyzer value
永胜 YS大邑 DY永胜 YS大邑 DY永胜 YS大邑 DY
宜香4245 Yixiang 42456.47hij6.53abcd6.27fghi6.63abc72.27ef77.63abc
内5优39 Nei 5 you 397.63abc6.83ab7.30abc6.97a83.27a80.37a
Y两优1号 Y liangyou 1 hao7.10defg5.90cdef6.93de6.23abcde79.90b76.27abc
川优6203 Chuanyou 62036.93efg6.37abcde6.77de6.43abcd77.13bc77.23abc
晶两优534 Jingliangyou 5346.40ij5.70def6.30fgh5.90cde73.57de73.00cdef
旌优127 Jingyou 1276.40ij5.83cdef6.23ghi5.87cde73.40de72.10cdef
渝香203 Yuxiang 2036.77ghi6.70abc6.57efg6.80ab76.43cd79.47ab
繁优609 Fanyou 6097.70ab6.93a7.40ab6.80ab82.83a79.67ab
C两优华占 C liangyouhuazhan6.23j6.27abcdef6.07hi6.50abc73.10e77.20abc
天优华占 Tianyouhuazhan7.30cde5.97cdef7.03cd6.00bcde79.50bc71.83cdef
花香优1618 Huaxiangyou 16187.93a6.23abcdef7.60a6.40abcd84.73a75.57abcd
绿优4923 Lüyou 49235.40k4.47g5.23j4.77f65.00g62.07g
中优295 Zhongyou 2956.97efg5.60ef6.57efg5.47ef76.80bc68.43ef
隆两优1146 Longliangyou 11466.83fgh5.97cdef6.63ef6.13abcde77.73bc74.47abcde
F优498 F you4987.20def6.27abcdef6.83de6.17abcde78.43bc74.13bcde
中9优2号 Zhong 9 you2 hao6.50hij6.27abcdef6.30fgh6.03bcde72.93e72.93cdef
蜀优217 Shuyou 2176.30j5.90cdef5.90i5.80cde69.63f70.13def
宜香优2115 Yixiangyou 21157.43bcd6.70abc7.07bcd6.77ab79.43bc79.37ab
川优8377 Chuanyou 83775.17k5.47f5.10j5.60de63.20g67.63f
渝优7109 Yuyou 71096.53hij6.00bcedf6.23ghi6.13abcde72.37ef73.20cdef
均值 Mean6.76A6.10B6.52A6.17B75.58A74.14B
变幅Range5.17-7.934.47-6.935.10-7.604.77-6.9763.2-84.7362.07-80.37
CV (%)10.469.219.998.627.476.29
双因素方差分析的 P 值 P values of two-ways ANOVA
生态点Location0.000***0.000***0.003**
品种Variety0.000***0.000***0.000***
生态点×品种Location?Variety0.000***0.000***0.000***

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2.2 不同食味评价方法指标对食味的贡献率分析

表5可知,不同评价方法下各评分指标均与食味呈极显著正相关关系,但各指标对食味的贡献率表现不一。在感官百分制评分下,各指标贡献率表现为:适口性>外观>滋味>气味>冷饭质地;等级综合评分和感官百分制评分基本一致,表现为:适口性>滋味>外观>气味>冷饭质地。在国标两种感官评价下,适口性相较于其他感官指标对食味的直接通径系数最大,分别为0.38和0.44,贡献率最高为0.33和0.36,是影响食味评分的最重要指标;冷饭质地对食味评分的贡献率最小,分别为0.08和-0.02。食味计评分方法下,口感和外观贡献率分别为1.28和-0.32,直接作用分别为1.31和-0.35,口感对食味计评分的贡献率明显大于外观。

Table 5
表5
表5不同食味评价方法下食味指标对米饭食味的作用
Table 5The effect of food taste indexes on rice food taste under different rice eating quality evaluation methods
影响指标
Sensory influence index
相关系数
Correlation coefficient
通径系数Path coefficient贡献率
Contribution rate
直接作用
Direct effect
间接作用Indirect effect
Ar→TAp→TP→TF→TC→T
感官百分制评分 Sensory hundred percentage point system
气味Aroma0.72**0.210.150.190.130.050.15
外观Appearance0.83**0.300.110.250.130.050.25
适口性Palatability0.86**0.380.100.190.120.060.33
滋味Flavor0.82**0.200.130.190.230.070.16
冷饭质地Cold rice texture0.57**0.150.070.100.160.090.08
等级综合评分 Comprehensive grade rating
气味Aroma0.66**0.140.140.220.18-0.020.09
外观Appearance0.76**0.300.070.230.18-0.010.23
适口性Palatability0.83**0.440.070.160.20-0.030.36
滋味Flavor0.82**0.300.080.170.28-0.020.25
冷饭质地Cold rice texture0.57**-0.040.060.070.300.17-0.02
食味计评分 Taste analyzer value
外观Appearance0.92**-0.351.27-0.32
口感Taste0.98**1.31-0.341.28
Ar:香气,Ap:外观,P:适口性,F:滋味,C:冷饭质地,T:食味值(感官百分制评分中为百分制评分食味值,等级综合评分中为等级综合食味值,食味计中为食味计值)
Ar: Aroma, Ap: Appearance, P: Palatability, F: Flavor, C: Cold rice texture, T: Taste value (in the sensory hundred percentage point system, the T is the SHP; in the comprehensive grade rating, the T is the CGR , and in the taste analyzer, the T is the TAV)

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2.3 杂交籼稻品种食味评价差异分析

2.3.1 杂交籼稻品种对食味评价方法的响应 由图2可知,不同品种对不同评价方法的响应存在差异。永胜各品种在3种评价方法下食味最高的为花香优1618和宜香优2115,繁优609次之,绿优4923食味最低;渝香203的2种感官评价结果分别为73.68和-0.74,为低食味品种(图2-a、b),但食味计评分(76.43)显著高于平均食味(图2-c);同时根据各方法下平均食味分析可以看出,永胜生态点在2种感官评价下,高于各自方法平均食味的品种基本一致,分别为宜香优2115、隆两优1146、花香优1618等10个品种(图2-a、b),在食味计评分中优于平均值的品种共11个(图2-c),但食味计评分中优于平均食味且和感官一样优于平均食味的品种仅有宜香优2115等6个。大邑生态点在3种评价方法下,隆两优1146食味评价最高,分别为86.2、1.92、74.47(图2-d—f),宜香优2115、川优6203和繁优609次之,绿优4923食味在3种评分方法下均最低,分别为73.44、-1.07、62.07;Y两优1号在两种感官评分中食味最差,为72.65、-0.95,但在食味计评分下食味较高(76.27);宜香4245、内5优39等8个品种在食味计中评价优良,但在感官评分下仅达到平均食味水平。从2种感官评价下的品种平均食味分析来看,大邑生态点优于平均食味品种为宜香优2115等5个品种,在食味计中优于平均食味的有10个品种,食味计评分与感官评分相同品种为宜香优2115、隆两优1146、繁优609和川优6203。

图2

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图220个杂交籼稻品种食味在3种食味评价方法下综合对比

a、b、c分别代表永胜生态点品种在感官百分制评分、等级综合评分、食味计评分下20个籼稻品种的食味值;d、e、f分别表示大邑生态点品种在感官百分制评分、等级综合评分、食味计评分下20个籼稻品种的食味值。SHP:感官百分制评分;CGR:等级综合评分;TAV:食味计评分
Fig. 2Comprehensive comparison of the taste of 20 hybrid indica rice varieties under three taste evaluation methods

a, b, c represents the taste value of 20 indica rice varieties under the sensory hundred percentage point system, comprehensive grade rating, and taste analyzer value of Yongsheng eco-point varieties, respectively; d, e, f represents the taste value of 20 indica rice varieties under the sensory hundred percentage point system, comprehensive grade rating, and taste analyzer value of Dayi eco-point varieties, respectively. SHP: Sensory hundred percentage point system, CGR: Comprehensive grade rating, TAV: Taste analyzer value


2.3.2 不同食味评价方法线性拟合分析 由图3不同评价方法的关系来看,感官百分制评分与等级综合评分线性拟合度较高,且相关系数r=0.94***,说明感官评价下的百分制评分和等级制综合评分评价规律一致,回归函数可以充分揭示相互之间在评价籼稻食味时的关系。食味计评分与感官百分制评分、等级综合评分线性拟合的相关系数分别为r=0.49***r= 0.53***,虽然均达到极显著水平,但相关系数较低,品种之间的离散程度较大,还不足以完全解释食味计和2种感官评分方法之间的关系。

图3

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图3不同评价方法线性关系拟合

Fig. 3Linear relationship fitting of different evaluation methods



2.3.3 杂交籼稻品种食味评分聚类分析 分别将2个生态点20个籼稻品种综合3种食味评分方法下的食味进行聚类分析,品种间距离为欧式距离,聚类方法为最长距离法,结果见图4。当欧式距离为10时,永胜生态点品种聚为4类,内5优39、繁优609、花香优1618、宜香优2115等高食味品种聚为一类,占供试品种20%;川优6203等7个品种属于中高食味品种,占35%;宜香4245、蜀优217等7个品种属于中低食味品种,占35%;绿优4923和川优8377等低食味品种聚为一类,占10%。当欧式距离为12时,大邑生态点20个品种聚为4类,隆两优1146食味最优,绿优4923食味最差;宜香4245、Y两优1号等9个品种属于中高食味品种,占45%;晶两优534、蜀优217等9个品种属于中低食味品种,占45%。

图4

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图420个杂交籼稻品种在3种评价方法下的聚类分析

Fig. 4Cluster analysis of 20 indica hybrid rice varieties under 3 eating quality evaluation methods



3 讨论

3.1 不同杂交籼稻品种对食味品质评价方法的响应

国内外主要通过感官评价和食味计测定等方法来直接评价稻米食味品质,但不同评价方法间研究结果不尽相同[17,18]。感官品尝虽费时费力,但能直观反映消费者的食味嗜好,一直被广泛研究应用[28]。本试验通过应用国标中2种感官方法评价西南籼稻品种食味品质发现,不同品种的食味在2种感官评价下趋势一致,虽然2种感官评分的打分方式不一样,但其相关系数高达r=0.93***,说明在感官品尝方法下,品尝员食味嗜好主要受主观因素影响,打分方法的不同并没有影响食味嗜好的表达,百分制评分和等级综合评分之间线性拟合较好,可以较好的解释两者在评价西南籼稻食味时趋势相同的关系。但百分制评分方法评分项目冗杂,易造成感官疲惫而导致敏感度下降[29],本试验品尝员为具备专业素养的在校大学生,感官较灵敏且理解能力强,因此这一问题并不突出。但在进行普通消费者食味嗜好研究时,应充分考虑普通消费者理解能力和知识水平等因素,选择更为便捷高效的方法。通过综合分析2种感官对食味评价方法的特点,等级综合评分比百分制评分更适合普通消费者食味嗜好调查,这与日本推广的感官评分四点法一致。

食味计通过可见光和近红外光谱与理化指标关系对米饭食味进行客观评价[17],可以实现食味测定的无损化轻便快捷,或许将成为将来食味研究的主要方法。本试验通过应用食味计和感官同时测定杂交籼稻品种食味,发现食味计评分与2种感官评分相关系数分别仅为0.49***和0.53***,离散程度较大,这与孙建平等[30]研究结果相同,但与吕庆云等[31]探究籼稻食味评价模型相关系数(r=0.7053)研究结果不甚一致,究其原因可能与评分方法和样本量不一样有关,吕庆云等[31]是日本四点法,品尝员来源于不同食味嗜好,差异也较大,年龄段也会导致差异[32]。从食味计评价特点出发,食味计内置函数中感官食味主要是日本粳稻品种的感官食味规律,应用在复杂人口分布的中国和众多籼稻品种时还存在一定差异。本试验结果表明,不同品种对评分方法的响应不同,以永胜为例,在感官评分下高于平均食味,但食味计评价低于平均食味的品种占25%,如晶两优534等5个品种;在食味计评价高于平均食味但在感官评分下低于平均食味的品种共20%,如F优498等4个品种;在3种方法下具有相同趋势的品种占55%,如宜香优2115等11个品种,这说明食味计评分和感官评分之间存在一定差异,单一的评价方法并不能准确反映大米食味品质。虽然食味计评分和2种感官评价离散程度较大,但均达到极显著水平。为了更加明确食味计与感官评价之间的关系,后续需扩大品尝人数,并多方面考虑品尝员年龄、性别、民族、籍贯等因素对食味的影响,以建立食味计和感官评价之间的函数模型,达到未来使用食味计能快速准确测定籼稻食味的目的。

3.2 西南杂交籼稻优良食味品种的优选

前人就优良稻米食味品质的测定方法进行了较多探索和研究[17,33]。应用较多的是成分关联法,主要通过对稻米组分含量及理化特性的分析间接反映稻米食味品质。直链淀粉反映了糊化特性,直接影响稻米的蒸煮食味品质,对软硬度、回生特性有极显著作用[6]。前人研究指出,直链淀粉含量越高的品种RVA特征谱崩解值越小,冷胶黏度、回复值和消减值越大,食味越差[20]。蛋白质作为大米第二大成分,对大米硬度产生极显著影响,高蛋白质含量米饭硬度高、黏性低,进而使米饭口感变差[34]。此外,一定范围内脂肪含量高的水稻品种具有米饭光泽油亮、口感更好等特点[35]。然而一个国家或地区对稻米的嗜好并不是稻米分级标准和理化指标所能涵盖和说明的,目前最终要依靠感官评价[36]。本研究发现,除蜀优217外,本试验所有品种均达国标三级及以上,但食味却相差甚远,前人对审定时达到《优质稻谷》三级或以上品种的食味品质调查发现,与市场上消费者需求并不匹配[13]。如川优8377在国标审定时达优质稻米一级,但在本试验中却是食味最差的品种,与近年来广大种植户反映该品种食味差的现状相符。也有如三级品质品种花香优1618等,虽在审定时为三级大米,食味却是优异的。其原因在于进行品质定级时,着重考查品种加工品质、外观品质、直链淀粉含量、蛋白质含量等,并未对大米等级的食味值进行具体的分类,进而出现理化指标相近的品种,食味差异较大的情况[6]。因此,食味品质的判定最终还是要以测定米饭食味为准。本试验综合运用3种稻米食味评价方法,发现在2种感官评分下,食味优良的品种具备气味、外观、适口性、滋味、冷饭质地品质均优良的特性,食味计评分下食味优良的品种具备外观和口感俱佳的特点,与前人对理化指标和食味指标的关联研究具有一致性[37,38],以此筛选出宜香优2115、内5优39、繁优609、花香优1618、川优6203和隆两优1146,并在2019年的西南地区示范种植时均表现出优良的食味。

4 结论

稻米食味品质受多种因素共同调控。食味优良的品种具备气味、外观、适口性、滋味、冷饭质地均优良的共性,且适口性对稻米食味的影响最高,冷饭质地影响最小。不同品种对不同评价方法的响应不同,国标2种感官评分相关系数达r=0.94***,说明感官在评价籼稻食味时具有相同趋势且关系密切;2种感官评分方法和食味计值的拟合相关系数分别为r=0.49***r=0.53***,离散程度较大,因此,单一评分方法不能完全准确反映各品种稻米食味品质。本试验在3种食味评价方法综合评价下,品种宜香优2115、内5优39、繁优609、花香优1618、川优6203和隆两优1146具备优良食味的共性,且食味稳定,可以作为西南优质食味品种推广。

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