马氏珠母贝生长性状QTL鉴定及基因型选择效应分析*
作者简介:韦国建(1988—), 男, 广西来宾市人, 硕士研究生, 研究方向为马氏珠母贝分子育种。E-mail: weiguojian2014@163.com, 电话: 02089023144
收稿日期: 2016-07-28
要求修回日期: 2016-09-12
网络出版日期: 2017-04-06
基金资助
广东省渔业科技与发展专项(Z2014014、Z2015014)
广东省科技计划项目(2014B030301064)
Verification of QTL and genotype selection effect of QTL for growth-related traits in the Pearl Oyster, Pinctada fucata
Received date: 2016-07-28
Request revised date: 2016-09-12
Online published: 2017-04-06
Supported by
Marine Fishery Science and Technology Development Project in Guangdong Province (Z2014014, Z2015014)
Science and Technology Plan Project of Guangdong Province (2014B030301064)
Copyright
对马氏珠母贝生长性状QTL411871进行初步验证, 然后建立两种基因型组配: ♀AT×♂AT(30号)和♀TT×♂AT(31号), 对其实际的基因型效应进行分析。结果显示, QTL411871在验证群体中与闭壳肌重显著相关(P<0.05), 优势基因型为AT。在30和31号基因型组配中, QTL411871与生长性状关联不显著(P>0.05), AT基因型的遗传效应小, 但仍是个体生长性状均值最大的基因型。QTL423886标记在30号组配中与壳高、壳长和总重显著相关(P<0.05), 其AG基因型个体的壳高、壳长和总重显著大于GG基因型; 而在31号组配中与生长性状关联不显著(P>0.05)。基于这2个QTL标记在30和31号组配中分别构建二倍型, 发现在30号组配中二倍型C1(ATAG)和31号组配中D1(ATAA)型对马氏珠母贝的生长最为有利, 可作为优先的基因型组合。该结果为开展马氏珠母贝的分子标记辅助选择育种提供了指导。
韦国建 , 李耀国 , 林坚士 , 何毛贤 . 马氏珠母贝生长性状QTL鉴定及基因型选择效应分析*[J]. 热带海洋学报, 2017 , 36(2) : 19 -25 . DOI: 10.11978/2016072
QTL411871 was identified in the verifying population of Pinctada fucata, and two genotype matings♀AT×♂AT(Group No.30 ) and ♀TT×♂AT(Group No.31) were established to analyze genotype selection effect of QTL. The results showed that QTL411871 was significantly associated with muscle mass in the verifying population (P<0.05), and AT was the superior genotype. QTL411871 was not significantly associated with growth traits in Groups No. 30 and No. 31 (P>0.05); the genetic effect of AT genotype was small, but it was still the genotype with the maximal average of growth traits. QTL423886 was significantly associated with shell height, shell length and total weight in Group No. 30 (P<0.05), and the oysters with genotype AG were bigger than those with the genotype GG in terms of shell height, shell length and total weight, but it was not significantly associated with growth traits in Group No.31 (P>0.05). Diplotypes were constructed based on the two QTLs, and association analyses revealed that C1 (ATAG) in Group No.30 and D1 (ATAA) in Group No.31 might be the most advantageous diplotypes for growth traits. These results are useful for developing molecular marker assisted breeding of Pinctada fucata.
Tab. 1 Primers used for analysis of QTL411871表1 QTL411871标记SNP分型引物 |
引物 名称 | 序列(5'-3') | 退火 温度/℃ | 等位基因 | 对应产物/bp |
---|---|---|---|---|
FI | GGAAACGGAATTCACATTCATTATCTTTA | 64 | A | 200 |
RI | AATGTCAAGCTGGATATAATTTAGCTCTA | 60 | T | 171 |
FO | AAATTATTGAAACTATTTCACCGATTCG | 62 | 空白 | 空白 |
RO | TTGTGATTTCATTTTCGTATCAATATTCTT | 62 | 空白 | 空白 |
Tab. 2 Genetic parameters of QTLs in P. fucata表2 QTL标记的遗传参数 |
群体/组配 | QTL | PIC | Ho | He | HWE P值 |
---|---|---|---|---|---|
G3群体 | 411871 | 0.3737 | 0.4688 | 0.4973 | 0.5388 |
30号组配 | 411871 | 0.3744 | 0.5081 | 0.5002 | 0.8286 |
31号组配 | 411871 | 0.3031 | 0.4947 | 0.3733 | 0.0000* |
30号组配 | 423886 | 0.3121 | 0.5243 | 0.3879 | 0.0000* |
31号组配 | 423886 | 0.3591 | 0.5291 | 0.4703 | 0.0848 |
注: *表示经过校正后仍显著偏离哈迪-温伯格平衡的位点。 |
Tab. 3 Association analysis of QTL411871 and growth traits in P. fucata using GLM表3 马氏珠母贝 QTL 411871与G3群体生长性状的 GLM 分析 |
因变量 | 平方和 | 自由度 | 均方 | 均方比 | 显著性水平 |
---|---|---|---|---|---|
壳高 | 131.931 | 2 | 65.965 | 1.646 | 0.198 |
壳长 | 190.819 | 2 | 95.409 | 2.662 | 0.075 |
壳宽 | 102.914 | 2 | 51.457 | 2.621 | 0.078 |
铰合线 | 13.046 | 2 | 6.523 | 1.751 | 0.179 |
总重 | 101.711 | 2 | 50.856 | 1.796 | 0.172 |
壳重 | 14.224 | 2 | 7.112 | 0.837 | 0.436 |
软体部重 | 23.358 | 2 | 11.679 | 2.905 | 0.060 |
闭壳肌重 | 1.138 | 2 | 0.569 | 3.853 | 0.032 |
Tab. 4 Multiple comparison of growth traits in P. fucata G3 population at QTL411871 loci表4 QTL411871不同基因型与G3群体生长性状的多重比较 |
基因型 | 数量 | 壳高/mm | 壳长/mm | 壳宽/mm | 铰合线/mm | 总重/g | 壳重/g | 软体部重/g | 闭壳肌重/g |
---|---|---|---|---|---|---|---|---|---|
AT | 45 | 49.09±6.13a | 47.80±6.04a | 17.36±1.88a | 41.22±4.77a | 17.64±5.14a | 9.97±2.61a | 5.47±2.06a | 0.92±0.41a |
AA | 29 | 48.93±7.06a | 46.78±6.48a | 17.70±2.05a | 40.74±4.34a | 17.60±5.92a | 9.85±3.09a | 5.44±2.19a | 0.84±0.42a |
TT | 22 | 46.24±5.68a | 44.21±5.12b | 16.69±1.87a | 38.61±3.76b | 15.17±4.81a | 9.01±3.27b | 4.28±1.59b | 0.64±0.31b |
注: 同一列上标不同小写字母表示差异显著(P<0.05), 下同。 |
Tab. 5 Multiple comparison of growth traits in P. fucata at QTLs loci表5 QTL标记不同基因型在2个组配中的生长性状值的多重比较 |
组配 | QTL | 基因型 | 数量 | 壳高/mm | 壳长/mm | 壳宽/mm | 铰合线/mm | 总重/g | 软体部重/g | 壳重/g |
---|---|---|---|---|---|---|---|---|---|---|
30号 | 411871 | AT | 94 | 29.66±4.11a | 33.14±3.95a | 10.94±3.63a | 30.50±3.63a | 3.92±1.62a | 1.25±0.60a | 2.02±0.78a |
TT | 41 | 29.23±3.20a | 32.60±2.85a | 10.92±1.26a | 30.29±3.15a | 3.76±1.18a | 1.22±0.42a | 1.95±0.53a | ||
AA | 50 | 29.07±3.70a | 32.44±3.43a | 10.67±1.40a | 29.77±3.19a | 3.59±1.21a | 1.16±0.46a | 1.92±0.63a | ||
423886 | AG | 97 | 30.39±4.10a | 33.55±3.96a | 11.03±1.69a | 30.47±3.76a | 4.06±1.67a | 1.31±0.66a | 2.08±0.80a | |
GG | 88 | 28.69±3.13b | 32.45±2.94b | 10.80±1.20a | 30.04±2.90a | 3.64±1.06b | 1.17±0.35a | 1.93±0.53a | ||
31号 | 411871 | AT | 94 | 34.71±3.89a | 37.40±3.41a | 13.21±1.59a | 33.80±3.82a | 5.73±1.78a | 2.00±0.75a | 2.87±0.83a |
TT | 96 | 33.92±3.62a | 36.91±3.60a | 13.01±1.69a | 33.26±3.59a | 5.49±1.65a | 1.81±0.64a | 2.78±0.78a | ||
423886 | AA | 68 | 34.55±4.09a | 37.33±3.79a | 13.10±1.67a | 33.65±3.73a | 5.60±1.85a | 1.94±0.78a | 2.85±0.85a | |
AG | 100 | 34.43±3.53a | 37.29±3.41a | 13.11±1.62a | 33.62±3.84a | 5.72±1.68a | 1.91±0.67a | 2.85±0.80a | ||
GG | 21 | 33.10±3.71a | 35.96±2.96a | 12.85±1.69a | 32.70±3.07a | 5.11±1.47a | 1.74±0.57a | 2.59±0.67a |
注: 同一列上标不同小写字母表示差异显著(P<0.05)。 |
Tab. 6 Multiple comparison of growth traits among diplotypes of QTL in P. fucata表6 QTL标记SNP二倍型生长性状的多重比较 |
组配 | 二倍型 | QTL 411871 | QTL 423886 | 数量 | 壳高/mm | 壳长/mm | 壳宽/mm | 铰合线/mm | 总重/g | 软体部重/g | 壳重/g |
---|---|---|---|---|---|---|---|---|---|---|---|
30号 | C1 | AT | AG | 52 | 30.70±4.33a | 33.88±4.17a | 11.25±1.90a | 30.77±3.90a | 4.28±1.88a | 1.41±0.76a | 2.20±0.92a |
C2 | AA | AG | 25 | 33.42±3.78ab | 33.42±3.27ab | 10.87±1.21a | 30.21±3.16a | 3.83±1.28ab | 1.19±0.46ab | 1.93±0.59ab | |
C3 | TT | AG | 19 | 30.07±3.58ab | 33.88±4.17ab | 11.82±1.55a | 30.29±4.06a | 3.88±1.45ab | 1.20±0.54ab | 2.00±0.96ab | |
C4 | AA | GG | 24 | 29.26±3.36ab | 33.00±2.70ab | 10.97±1.24a | 30.87±2.75a | 3.90±1.03ab | 1.29±0.38ab | 2.07±0.51ab | |
C5 | AT | GG | 42 | 28.60±2.96b | 32.34±2.93b | 10.76±1.14a | 30.31±2.97a | 3.55±0.99b | 1.10±0.33b | 1.90±0.52b | |
C6 | TT | GG | 21 | 28.36±3.26b | 32.11±3.30b | 10.97±1.29a | 30.11±3.06a | 3.57±1.22b | 1.18±0.35b | 1.86±0.56b | |
31号 | D1 | AT | AA | 36 | 35.38±4.44a | 37.89±4.04a | 13.26±1.73a | 34.57±3.76a | 5.89±2.08a | 2.11±0.88a | 2.97±0.97a |
D2 | AT | AG | 44 | 34.49±3.32ab | 37.26±2.99ab | 13.17±1.43a | 33.41±4.05ab | 5.67±1.61ab | 1.93±0.69ab | 2.82±0.76ab | |
D3 | TT | AG | 56 | 34.39±3.72ab | 37.32±3.73ab | 13.16±1.77a | 33.78±3.70ab | 5.77±1.74ab | 1.90±0.66ab | 2.87±0.84ab | |
D4 | AT | GG | 14 | 33.67±4.00ab | 36.56±2.90ab | 13.23±1.78a | 33.03±3.04ab | 5.50±1.52ab | 1.93±0.57ab | 2.74±0.71ab | |
D5 | TT | AA | 32 | 33.62±3.60ab | 36.70±3.57ab | 12.93±1.64a | 32.62±3.51b | 5.27±1.54ab | 1.74±0.63b | 2.72±0.70ab | |
D6 | TT | GG | 7 | 31.98±3.03b | 34.75±2.90b | 12.08±1.30a | 32.03±3.25b | 4.32±1.07b | 1.36±0.34b | 2.29±0.52b |
注: 同一列上标不同小写字母表示差异显著(P<0.05)。 |
The authors have declared that no competing interests exist.
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