新疆农业科学 ›› 2022, Vol. 59 ›› Issue (10): 2446-2455.DOI: 10.6048/j.issn.1001-4330.2022.10.013
杨永1(), 范蓉1, 张学军1, 李寐华1, 凌悦铭1, 张红1, 杨文莉1, 姜雪2, 张永兵1(), 伊鸿平1()
收稿日期:
2021-11-24
出版日期:
2022-10-20
发布日期:
2022-12-21
通信作者:
张永兵,伊鸿平
作者简介:
杨永(1986-),男,山东人,副研究员,研究方向为甜瓜分子遗传育种,(E-mail)yangyongsj062@163.com
基金资助:
YANG Yong1(), FAN Rong1, ZHANG Xuejun1, LI Meihua1, LING Yueming1, ZHANG Hong1, YANG Wenli1, JIANG Xue2, ZHANG Yongbing1(), YI Hongping1()
Received:
2021-11-24
Online:
2022-10-20
Published:
2022-12-21
Correspondence author:
ZHANG Yongbing, YI Hongping
Supported by:
摘要:
【目的】运用QTL分析厚皮甜瓜心部果肉蔗糖含量,挖掘影响该性状的候选基因,为厚皮甜瓜甜味性状的遗传改良奠定理论基础。【方法】以高糖材料VZX(V醉仙)为母本和低糖材料HP(高代自交系)为父本杂交衍生的F2群体为研究对象,利用高效液相色谱仪测定果实赤道位置心部果肉蔗糖含量,从F2群体中挑选蔗糖含量极端高和极端低的单株各20个,分别构建高蔗糖池和低蔗糖池,对双亲及混合池均进行全基因组重测序(约20×覆盖深度),定位蔗糖性状的关联区间,并结合生物信息学分析候选基因。【结果】厚皮甜瓜心部果肉蔗糖含量在F2群体中基本呈正态分布,符合典型的数量性状遗传特征;对双亲及混池进行全基因组重测序,共获得有效数据32.62 G,Q20在95%以上,平均覆盖深度为17.76,比对到参考基因组上的总reads数目比例在98.72%~99.02%,测序数据质量高,参考基因组选择合理有效;在8号染色体定位到1个3.29 Mb的区间,共注释到108个基因;在初定位区间内获得1个参与糖酵解和糖异生生化过程的候选基因EVM0000647,在高糖和低糖亲本间编码区无非同义突变,但启动子区域具有大量差异位点,且表达量具有明显差异。【结论】极端混池测序(BSA)方法,在8号染色体上定位到1个影响厚皮甜瓜心部果肉蔗糖含量的QTL,大小为3.29 Mb,共注释到108个基因,其中候选基因EVM0000647,通过差异表达负调控厚皮甜瓜心部果肉蔗糖的积累。
中图分类号:
杨永, 范蓉, 张学军, 李寐华, 凌悦铭, 张红, 杨文莉, 姜雪, 张永兵, 伊鸿平. 厚皮甜瓜心部果肉蔗糖含量QTL定位及候选基因分析[J]. 新疆农业科学, 2022, 59(10): 2446-2455.
YANG Yong, FAN Rong, ZHANG Xuejun, LI Meihua, LING Yueming, ZHANG Hong, YANG Wenli, JIANG Xue, ZHANG Yongbing, YI Hongping. QTL Mapping and Candidate Gene Analysis of Sucrose Content in the Center Flesh of Muskmelon[J]. Xinjiang Agricultural Sciences, 2022, 59(10): 2446-2455.
样品 Sample | 原始 Reads Raw Reads | 原始 数据量 Raw Bases | 有效 Reads Valid Reads | 有效 数据量 Valid Bases | 有效 Reads比 Valid reads(%) | Q20 (%) | Q30 (%) | GC (%) | 比对率 Mapped (%) | 平均测 序深度 Mean Coverage |
---|---|---|---|---|---|---|---|---|---|---|
VZX | 54760488 | 8.21G | 54291372 | 8.05G | 99.02 | 95.63 | 89.07 | 36.16 | 99.02 | 19.47 |
HP | 54990792 | 8.25G | 54554276 | 8.09G | 98.8 | 95.59 | 89.07 | 37.03 | 98.8 | 18.71 |
HS | 57851318 | 8.68G | 56875210 | 7.91G | 98.78 | 96.81 | 92.22 | 44.01 | 98.72 | 17.12 |
LS | 61879250 | 9.28G | 60969402 | 8.57G | 98.72 | 96.75 | 92.19 | 43.7 | 98.78 | 15.72 |
表1 测序数据质量
Table 1 Quality statistics of sequence data
样品 Sample | 原始 Reads Raw Reads | 原始 数据量 Raw Bases | 有效 Reads Valid Reads | 有效 数据量 Valid Bases | 有效 Reads比 Valid reads(%) | Q20 (%) | Q30 (%) | GC (%) | 比对率 Mapped (%) | 平均测 序深度 Mean Coverage |
---|---|---|---|---|---|---|---|---|---|---|
VZX | 54760488 | 8.21G | 54291372 | 8.05G | 99.02 | 95.63 | 89.07 | 36.16 | 99.02 | 19.47 |
HP | 54990792 | 8.25G | 54554276 | 8.09G | 98.8 | 95.59 | 89.07 | 37.03 | 98.8 | 18.71 |
HS | 57851318 | 8.68G | 56875210 | 7.91G | 98.78 | 96.81 | 92.22 | 44.01 | 98.72 | 17.12 |
LS | 61879250 | 9.28G | 60969402 | 8.57G | 98.72 | 96.75 | 92.19 | 43.7 | 98.78 | 15.72 |
样品 Sample | SNP数量 SNPnumber | 转换类型 Transition | 颠换类型 Transversion | 转换颠换比 Ti/Tv | 杂合类型 Heterozygosity | 纯合类型 Homozygosity | 杂合比例 Het-ratio(%) |
---|---|---|---|---|---|---|---|
VZX | 1 085 663 | 715238 | 370425 | 1.93 | 288596 | 797067 | 26.58 |
HP | 1 447 738 | 957173 | 490565 | 1.95 | 334375 | 1113363 | 23.09 |
HS | 1 522 875 | 1040990 | 481885 | 2.16 | 1031661 | 491214 | 67.74 |
LS | 1 570 752 | 1071527 | 499225 | 2.14 | 1084333 | 486419 | 69.03 |
表2 SNP变异位点统计
Table 2 Statistics of SNP polymorphism site
样品 Sample | SNP数量 SNPnumber | 转换类型 Transition | 颠换类型 Transversion | 转换颠换比 Ti/Tv | 杂合类型 Heterozygosity | 纯合类型 Homozygosity | 杂合比例 Het-ratio(%) |
---|---|---|---|---|---|---|---|
VZX | 1 085 663 | 715238 | 370425 | 1.93 | 288596 | 797067 | 26.58 |
HP | 1 447 738 | 957173 | 490565 | 1.95 | 334375 | 1113363 | 23.09 |
HS | 1 522 875 | 1040990 | 481885 | 2.16 | 1031661 | 491214 | 67.74 |
LS | 1 570 752 | 1071527 | 499225 | 2.14 | 1084333 | 486419 | 69.03 |
数据库 Annotated databases | 注释到的基因数 Annotated Gene Number |
---|---|
NR | 108 |
SwissProt | 72 |
GO | 88 |
KEGG | 40 |
COG | 101 |
Total | 108 |
表3 候选区间不同数据库注释基因数量
Table 3 Number of annotated genes in different databases in the candidate interval
数据库 Annotated databases | 注释到的基因数 Annotated Gene Number |
---|---|
NR | 108 |
SwissProt | 72 |
GO | 88 |
KEGG | 40 |
COG | 101 |
Total | 108 |
基因编号 Gene ID | 长度 Length | 注释 Annotation | KEGG通路 KEGG pathway |
---|---|---|---|
EVM0001419 | 2 466 | PREDICTED: LOW QUALITY PROTEIN: beta-galactosidase 7-like [Cucumis melo] | brp00052(Galactose metabolism) |
EVM0004758 | 2 466 | PREDICTED: LOW QUALITY PROTEIN: beta-galactosidase 7-like [Cucumis melo] | brp00053(Galactose metabolism) |
EVM0005074 | 2 466 | PREDICTED: LOW QUALITY PROTEIN: beta-galactosidase 7-like [Cucumis melo] | brp00054(Galactose metabolism) |
EVM0013242 | 2 466 | PREDICTED: LOW QUALITY PROTEIN: beta-galactosidase 7-like [Cucumis melo] | brp00055(Galactose metabolism) |
EVM0000647 | 1 561 | PREDICTED: triosephosphate isomerase, cytosolic [Cucumis melo] | cmo00010(Glycolysis /Gluconeogenesis);cmo00051(Fructose and mannose metabolism);cmo00710(Carbon fixation in photosynthetic organisms) |
EVM0008701 | 3 160 | PREDICTED: zinc finger CCCH domain-containing protein 36-like [Cucumis melo] | gmx00052(Galactose metabolism);gmx00500(Starch and sucrose metabolism);gmx00520(Amino sugar and nucleotide sugar metabolism) |
EVM0019814 | 2 856 | PREDICTED: carbon catabolite repressor protein 4 homolog 1-like [Cucumis melo] | cmo03018(RNA degradation) |
表4 与糖代谢相关的候选基因
Table 4 Candidate genes involved in sugar metabolism
基因编号 Gene ID | 长度 Length | 注释 Annotation | KEGG通路 KEGG pathway |
---|---|---|---|
EVM0001419 | 2 466 | PREDICTED: LOW QUALITY PROTEIN: beta-galactosidase 7-like [Cucumis melo] | brp00052(Galactose metabolism) |
EVM0004758 | 2 466 | PREDICTED: LOW QUALITY PROTEIN: beta-galactosidase 7-like [Cucumis melo] | brp00053(Galactose metabolism) |
EVM0005074 | 2 466 | PREDICTED: LOW QUALITY PROTEIN: beta-galactosidase 7-like [Cucumis melo] | brp00054(Galactose metabolism) |
EVM0013242 | 2 466 | PREDICTED: LOW QUALITY PROTEIN: beta-galactosidase 7-like [Cucumis melo] | brp00055(Galactose metabolism) |
EVM0000647 | 1 561 | PREDICTED: triosephosphate isomerase, cytosolic [Cucumis melo] | cmo00010(Glycolysis /Gluconeogenesis);cmo00051(Fructose and mannose metabolism);cmo00710(Carbon fixation in photosynthetic organisms) |
EVM0008701 | 3 160 | PREDICTED: zinc finger CCCH domain-containing protein 36-like [Cucumis melo] | gmx00052(Galactose metabolism);gmx00500(Starch and sucrose metabolism);gmx00520(Amino sugar and nucleotide sugar metabolism) |
EVM0019814 | 2 856 | PREDICTED: carbon catabolite repressor protein 4 homolog 1-like [Cucumis melo] | cmo03018(RNA degradation) |
图7 候选基因 注:A:基因EVM值0000647基本结构及双亲差异位点;B:双亲在基因EVM值0000647第8个外显子上的SNP差异位点;C:基因EVM值0000647在双亲间的差异表达
Fig.7 Candidate genesNote:A: The basic structure of EVM值0000647and the difference sequence of EVM值0000647 between parents; B: The SNP in exon 8 of EVM值0000647 between parents; C: Differential expression of EVM值0000647 between parents
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