ASSESSMENT OF MUSCULAR NUTRITIONAL QUALITY IN LARIMICHTHYS POLYACTIS, LARIMICHTHYS CROCEA, AND THEIR RECIPROCAL HYBRIDS
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摘要:
为评价小黄鱼(Larimichthys polyactis)、大黄鱼(Larimichthys crocea)及其杂交种(正交F1和反交F1)肌肉品质, 采用生化分析和组织学方法对四个群体肌肉营养成分及组织结构进行了研究。结果显示, 四个黄鱼群体粗脂肪含量介于4.73%—5.37%, 属中脂鱼类; 正交F1 (16.88%)和反交F1 (16.93%)粗蛋白含量显著高于小黄鱼(16.13%)和大黄鱼(16.01%); 在四个黄鱼群体中共检测到17种氨基酸, 其中必需氨基酸(EAA, Essential amino acid)7种, 不同群体必需氨基酸指数(EAAI, Essential amino acid index)为106.69—110.42, 正交F1和反交F1中氨基酸总量(TAA, Total amino acid)、必需氨基酸总量(TEAA, Total essential amino acid)及呈味氨基酸总量(TDAA, Total delicious amino acid)均显著高于双亲; 共检测出22种脂肪酸, 四个黄鱼群体中DHA和EPA含量占多不饱和脂肪酸总量的46.77%—49.27%, 其中DHA含量在两种杂交黄鱼中显著高于双亲。4种常量元素(K、Na、Mg和Ca)在不同群体中含量丰富, 6种微量元素(Mn、Zn、Fe、Se、Cu和Cr)中Zn和Fe在两种杂交黄鱼中显著高于双亲。肌肉组织学结构显示, 正交F1和反交F1肌纤维密度显著低于大黄鱼而与小黄鱼无显著性差异, 正交F1肌纤维直径显著高于双亲。综上所述, 四个黄鱼群体肌肉营养成分丰富, 均具有较高营养价值, 同时, 两种杂交黄鱼在特定营养指标上获得了一定的杂种优势。研究结果阐述了杂交育种对肌肉品质的影响, 可为黄鱼肉质改良及新品种培育提供参考依据。
Abstract:In this study, we evaluated the muscle nutritional quality of Larimichthys polyactis, Larimichthys crocea, and their reciprocal hybrids (L. polyactis ♀ × L. crocea ♂ LPC and L. crocea ♀ × L. polyactis ♂ LCP) by analyzing the biochemical composition and histological structure. The results revealed that the crude fat content of the four yellow croaker populations ranged from 4.73% to 5.37%, classifying them as medium-fat fish. The crude protein content of LPC (16.88%) and LCP (16.93%) exhibited a significant increase compared to both parental lines (16.13% and 16.01%). A total of 17 amino acids, including 7 essential amino acids (EAA), were identified in the four populations. The EAAI varied from 106.69 to 110.42 across different populations. TAA, TEAA, and TDAA levels in LPC and LCP were significantly higher compared to their parental populations. Among the 22 detected fatty acids, DHA and EPA constituted approximately 46.77% to 49.27% of the total PUFA content in all four populations, with significantly higher DHA content observed in both hybrid yellow croaker varieties compared to their parental counterparts. The populations exhibited abundant contents of 4 macroelements (K, Na, Mg, and Ca), while the hybrid yellow croaker species displayed significantly higher levels of Zn and Fe in 6 microelements (Mn, Zn, Fe, Se, Cu, and Cr) compared to their parents. The histological analysis revealed that the muscle fiber density of LPC and LCP was significantly lower compared to that of large yellow croaker, but showed no significant difference when compared to small yellow croaker. Additionally, the muscle fiber diameter of LPC was significantly higher than both parental species. In summary, the muscle nutrients of all four yellow croaker groups were abundant, exhibiting high nutritional value. Furthermore, certain heterosis in specific nutritional indexes was observed in the two hybrid yellow croaker species. These findings explicate the impact of crossbreeding on muscle quality and offer valuable insights for enhancing meat quality and developing new breeds of yellow croaker.
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Keywords:
- Hybrids /
- Muscle nutritional quality /
- Larimichthys polyactis /
- Larimichthys crocea
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表 1 四个黄鱼群体肌肉纤维直径和密度
Table 1 Muscle fiber diameter and density in four yellow croaker populations
指标Index 小黄鱼L. polyactis 大黄鱼L. crocea 正交F1 L.
polyactis ♀ ×
L. crocea ♂反交F1 L.
crocea ♀ ×
L. polyactis ♂直径Diameter (μm) 42.09±
12.24b41.88±
12.41b49.17±
17.51a44.44±
19.13ab密度Density (根/mm2) 377.31±
46.77b536.50±
31.96a367.74±
17.36b363.65±
27.34b注: 同行数据上标字母不同表示差异显著(P<0.05); 下同Note: Different superscript letters in the same row indicate significant differences (P<0.05); The same applies below 表 2 四个黄鱼群体肌肉常规营养成分比较
Table 2 Comparison of conventional nutritional components in the muscles among four populations of yellow croaker (wet weight, %)
群体
Population水分
Moisture粗灰分
Crude Ash粗蛋白
Crude protein粗脂肪
Crude fat小黄鱼
L. polyactis74.17±0.05a 3.07±0.02b 16.13±0.02b 4.73±0.04d 大黄鱼
L. crocea73.74±0.04b 3.66±0.09a 16.01±0.02c 5.37±0.03a 正交F1
L. polyactis ♀ ×
L. crocea ♂72.70±0.03c 3.14±0.02b 16.88±0.03a 5.03±0.02c 反交F1
L. crocea ♀ ×
L. polyactis ♂72.58±0.09c 3.18±0.02b 16.93±0.03a 5.12±0.02b 注: 同列数据上标字母不同表示差异显著(P<0.05); 下同Note: Different superscript letters in the same column indicate significant differences (P<0.05); the same applies below 表 3 四个黄鱼群体肌肉氨基酸组成
Table 3 Amino acid composition in the muscles of four yellow croaker populations (Dry weight, g/100 g)
氨基酸类别
Amino acid species氨基酸名称
Amino acid name小黄鱼
L. polyactis大黄鱼
L. crocea正交F1
L. polyactis ♀ ×
L. crocea ♂反交F1
L. crocea ♀ ×
L. polyactis ♂非必需氨基酸NEAA 天冬氨酸Asp* 7.78±0.04b 7.86±0.03b 7.99±0.02a 8.06±0.04a 酪氨酸Tyr 2.64±0.02b 2.57±0.03b 2.72±0.01a 2.74±0.37a 丝氨酸Ser 3.27±0.02c 3.32±0.03b 3.43±0.01a 3.36±0.00b 谷氨酸Glu* 11.76±0.04c 11.79±0.02c 12.12±0.03b 12.90±0.02a 脯氨酸Pro 2.38±0.02c 2.41±0.02c 2.55±0.03b 2.63±0.00a 甘氨酸Gly* 3.53±0.03 3.76±0.02 3.44±0.45 3.73±0.02 丙氨酸Ala* 4.36±0.02c 4.42±0.02c 4.62±0.02b 4.71±0.02a 胱氨酸Cys 0.47±0.01b 0.47±0.02b 0.54±0.01a 0.53±0.00a 组氨酸His 1.62±0.04 1.54±0.02 1.62±0.02 1.65±0.05 精氨酸Arg 4.52±0.03b 4.50±0.03b 4.69±0.03a 4.62±0.03a 必需氨基酸EAA 缬氨酸Val 3.85±0.02 3.84±0.03 3.92±0.02 3.87±0.03 甲硫氨酸Met 2.18±0.05b 2.09±0.02b 2.30±0.03a 2.33±0.03a 异亮氨酸Ile 3.48±0.03c 3.49±0.01c 3.69±0.02a 3.57±0.02b 亮氨酸Leu 6.14±0.02c 6.17±0.03c 6.32±0.02b 6.38±0.01a 苏氨酸Thr 3.39±0.02b 3.36±0.02b 3.47±0.03a 3.49±0.05a 苯丙氨酸Phe 3.04±0.02b 3.09±0.02b 3.31±0.02a 3.26±0.02a 赖氨酸Lys 7.26±0.02c 7.31±0.02c 7.53±0.03a 7.44±0.04b 氨基酸总量TAA 71.68±0.06c 72.01±0.11c 74.26±0.52b 75.28±0.22a 必需氨基酸总量TEAA 29.34±0.02b 29.34±0.11b 30.54±0.01a 30.34±0.13a 非必需氨基酸总量TNEAA 42.34±0.08c 42.67±0.05c 43.73±0.53b 44.93±0.10a 呈味氨基酸总量TDAA 27.44±0.09c 27.83±0.78bc 28.17±0.48b 29.41±0.07a EAA/TAA (%) 40.94±0.06a 40.75±0.09a 41.12±0.29a 40.31±0.05b EAA/NEAA (%) 69.31±0.18a 68.77±0.27a 69.85±0.85a 67.53±0.15b 注: *呈味氨基酸Note: *delicious amino acid 表 4 四个黄鱼群体肌肉必需氨基酸组成评价
Table 4 Evaluation of the essential amino acid composition in the muscles of four yellow croaker populations
氨基酸
Amino acidFAO评分模式
FAO scoring pattern
(mg/g N)鸡蛋蛋白
Egg protein
(mg/g N)小黄鱼
L. polyactis大黄鱼
L. crocea正交F1
L. polyactis ♀ ×
L. crocea ♂反交F1
L. crocea ♀ ×
L. polyactis ♂AAS CS AAS CS AAS CS AAS CS 缬氨酸Val 310 411 1.25 0.94 1.26 0.94 1.26 0.95 1.25 0.94 甲硫氨酸+胱氨酸Met+Cys 220 386 1.21 0.69 1.18 0.67 1.29 0.74 1.29 0.74 异亮氨酸Ile 250 331 1.40 1.06 1.42 1.07 1.47 1.11 1.42 1.07 亮氨酸Leu 440 534 1.41 1.16 1.42 1.17 1.44 1.18 1.45 1.19 苏氨酸Thr 250 292 1.37 1.17 1.36 1.17 1.39 1.19 1.39 1.19 苯丙氨酸+酪氨酸Phe+Tyr 380 565 1.51 1.01 1.51 1.02 1.59 1.07 1.57 1.06 赖氨酸Lys 340 441 2.15 1.66 2.18 1.68 2.21 1.71 2.18 1.68 必需氨基酸指数EAAI 106.69 106.91 110.42 109.46 表 5 四个黄鱼群体肌肉脂肪酸组成及含量
Table 5 Fatty acid composition and content in the muscles of four yellow croaker populations (%)
脂肪酸
Fatty acid小黄鱼
L. polyactis大黄鱼
L. crocea正交F1 L.
polyactis ♀ ×
L. crocea ♂反交F1 L.
crocea ♀ ×
L. polyactis ♂SFA C14﹕0 3.08±0.02c 3.37±0.04a 3.21±0.02b 3.26±0.01b C15﹕0 0.40±0.02 0.41±0.01 0.40±0.02 0.41±0.01 C16﹕0 26.85±0.05a 26.75±0.06a 26.48±0.05b 26.53±0.03b C17﹕0 0.42±0.00c 0.44±0.01b 0.49±0.00a 0.48±0.00a C18﹕0 5.49±0.05d 5.73±0.03c 6.08±0.04a 5.90±0.03b C20﹕0 0.27±0.01 0.28±0.01 0.29±0.00 0.29±0.01 C22﹕0 0.14±0.00a 0.16±0.00a 0.12±0.01b 0.13±0.00b ΣSFA 36.65±0.03b 37.13±0.04a 37.07±0.07a 37.00±0.04a MUFA C14﹕1 0.68±0.06b 1.55±0.57a 2.10±0.09a 2.08±0.07a C16﹕1 11.02±0.03b 11.32±0.03a 10.42±0.02d 10.59±0.04c C17﹕1 0.25±0.01 0.27±0.01 0.25±0.00 0.26±0.01 C18﹕1n-9c 29.73±0.03b 30.03±0.14a 30.28±0.11a 30.27±0.06a C20﹕1n-9 0.25±0.01 0.23±0.00 0.23±0.01 0.23±0.02 C22﹕1 0.14±0.00 0.13±0.00 0.13±0.00 0.13±0.00 C24﹕1n-9 0.35±0.01c 0.37±0.00bc 0.40±0.01a 0.39±0.00ab ΣMUFA 42.42±0.05b 43.91±0.44a 43.81±0.07a 43.94±0.10a PUFA C18﹕2n-6c 7.82±0.05a 6.62±0.05b 6.40±0.02c 6.34±0.07c C22﹕2 0.22±0.01c 0.35±0.01a 0.33±0.01a 0.26±0.01b C18﹕3n-6 0.42±0.02b 0.57±0.00a 0.56±0.01a 0.54±0.01a C18﹕3n-3 0.75±0.02a 0.70±0.01b 0.67±0.02b 0.67±0.01b C20﹕4 0.93±0.01a 0.84±0.03b 0.92±0.01a 0.93±0.00a C20﹕5n-3 (EPA) 3.78±0.02a 3.50±0.04b 3.22±0.03c 3.27±0.05c C22﹕5n-3 1.00±0.02a 0.88±0.02c 0.92±0.00b 0.94±0.00b C22﹕6n-3 (DHA) 6.01±0.02b 5.83±0.05c 6.10±0.03a 6.12±0.02a ΣPUFA 20.93±0.08a 19.30±0.07b 19.12±0.05bc 19.06±0.07c PUFA/SFA 0.57 0.52 0.51 0.52 表 6 四个黄鱼群体肌肉矿物质组成及含量
Table 6 Mineral elements composition and content in the muscles of four yellow croaker populations
矿物质
Mineral element (mg/kg)小黄鱼
L. polyactis大黄鱼
L. crocea正交F1
L. polyactis ♀ × L. crocea ♂反交F1
L. crocea ♀ × L. polyactis ♂常量元素
MacroelementK 9667.87±23.25a 9847.96±29.39a 9259.01±53.72b 9304.61±2.91b Na 885.56±1.38a 879.13±4.22a 818.42±5.26b 849.42±4.25ab Mg 911.23±3.94a 884.89±1.59b 870.53±3.02b 866.19±1.81b Ca 855.43±7.58b 981.09±4.27a 993.62±8.31a 998±2.44a 微量元素
MicroelementMn 1.92±0.01a 1.89±0.01ab 1.82±0.01b 1.72±0.01c Zn 19.03±0.06b 19.4±0.03ab 19.77±0.04a 19.66±0.07a Fe 23.06±0.07c 23.73±0.01b 24.75±0.06a 24.44±0.06a Se 0.74±0.00a 0.68±0.00b 0.75±0.01a 0.75±0.01a Cu 4.37±0.03b 4.63±0.02a 3.96±0.02c 3.96±0.02c Cr 0.00065±0.00a 0.00066±0.00a 0.00054±0.00b 0.00063±0.00ab -
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