中国水稻科学 ›› 2017, Vol. 31 ›› Issue (6): 568-579.DOI: 10.16819/j.1001-7216.2017.7003
张习春, 鲁菲菲, 吕育松, 罗荣剑, 焦桂爱, 邬亚文, 唐绍清, 胡培松, 魏祥进*()
收稿日期:
2017-01-06
修回日期:
2017-02-13
出版日期:
2017-11-25
发布日期:
2017-11-10
通讯作者:
魏祥进
基金资助:
Xichun ZHANG, Feifei LU, Yusong LÜ, Rongjian LUO, Guiai JIAO, Yawen WU, Shaoqing TANG, Peisong HU, Xiangjin WEI*()
Received:
2017-01-06
Revised:
2017-02-13
Online:
2017-11-25
Published:
2017-11-10
Contact:
Xiangjin WEI
摘要:
【目的】 研究两个水稻垩白突变体胚乳垩白的形成机制,为稻米品质改良提供理论基础。【方法】 以从中花11的EMS突变体库中筛选出的两个稳定遗传的垩白突变体eb6、eb7为材料,对其进行农艺性状、稻米理化性质和遗传学分析,并利用eb6与南京11衍生的F2群体对控制垩白的基因进行图位克隆。同时对候选基因的表达模式及淀粉合成相关基因在突变体及野生型中表达情况进行了分析。【结果】 与野生型相比,两个突变体胚乳中央部位呈现白色且不透明,淀粉复合颗粒形状不规则且排列疏松,而突变体胚乳边缘部位与野生型无异,都为半透明状,淀粉复合颗粒呈多面体且排列致密。相对于野生型,突变体eb6、eb7成熟种子中的直链淀粉含量和胶稠度显著降低,蛋白质含量显著升高。RVA谱分析显示突变体淀粉黏滞性明显低于野生型。同时,支链淀粉聚合度分析显示突变体eb6中聚合度(DP)小于16的短链显著增加,DP为16~23的中长链显著减少。遗传分析表明突变体eb6、eb7胚乳垩白表型由单隐性核基因控制,并且它们为一对等位突变体。利用突变体eb6与南京11杂交衍生的F2群体将突变体基因定位在第1染色体长臂上物理距离86.6 kb的区间内。该区间包含22个开放阅读框(ORF),其中ORF13编码腺苷二磷酸葡萄糖焦磷酸化酶大亚基2(OsAGPL2)。序列分析发现eb6与eb7分别在OsAGPL2第3、第7外显子上发生1个单碱基替换,并分别导致一个氨基酸替换。RT-PCR及原位杂交结果显示,OsAGPL2主要在水稻发育中的籽粒中表达。同时OsAGPL2的突变导致了多个淀粉合成相关基因在水稻籽粒灌浆过程中的表达模式发生改变。【结论】 突变体eb6、eb7籽粒胚乳出现严重垩白表型为OsAGPL2突变所致。本研究进一步证明了OsAGPL2在调控水稻籽粒胚乳中淀粉的合成、淀粉复合颗粒的形成及稻米理化性质的平衡中起着重要的作用。
中图分类号:
张习春, 鲁菲菲, 吕育松, 罗荣剑, 焦桂爱, 邬亚文, 唐绍清, 胡培松, 魏祥进. 两个垩白突变体的鉴定及突变基因的图位克隆[J]. 中国水稻科学, 2017, 31(6): 568-579.
Xichun ZHANG, Feifei LU, Yusong LÜ, Rongjian LUO, Guiai JIAO, Yawen WU, Shaoqing TANG, Peisong HU, Xiangjin WEI. Identification and Gene Mapping-based Clone of Two Chalkiness Mutants in Rice[J]. Chinese Journal OF Rice Science, 2017, 31(6): 568-579.
标记 Marker | 正向引物序列 Forward(5′-3′) | 反向引物序列 Reverse(5′-3′) | 片段大小 Product size/bp |
---|---|---|---|
RM7405 | TTGGCTCGCCCATATATAGG | CAGTCAGTCATCACTGGTAGTCG | 92 |
RM7341 | GCTTTGCTTGGTGGTCATTC | TGCAAGCTGAGTGTGAAACC | 145 |
M1 | TGCAACTTCTAGCTGCTCGA | GCATCCGATCTTGATGGG | 112 |
M2 | ACACCGCACCTAAACCCAAGACC | AGGCGCGTGAGAGAGGAATGG | 151 |
M4 | GACAACAATGGCCTCATCTTCC | GTCGTCGTCCTCGTAGTTCACG | 99 |
M5 | CCAGTGCACAACAGCACAAGC | GTTGGCTACTTGGCTTTCGATGG | 151 |
M7 | GTTCGTTTCCGAGATGTCACTGG | CGGGAGAGGGTACGATGAGTACG | 157 |
M10 | CTCCCCTTGTATTGGTAGA | TGAGAAACATCATACTCCATA | 174 |
M11 | CTCCCTCCCCAGGCAAGCAC | TGCAGCACAGACACGAGACC | 106 |
M12 | CATAACCCTGAAGTGGTGTGACG | GTGCTTGATGATATGGTCCTTGC | 149 |
M13 | GGAACTGCAGATTTGATGGAGAGG | CATATTCCACTGGGCGTCTGG | 106 |
M16 | AAAGCCTGGATAAGATGGTTCG | CTGTAGTTGCTGTTTGCCTGTCC | 124 |
M17 | GTGGAGGAGCGAAGGGAACACG | CCTCCCATATAAACCGGCGAACC | 140 |
M19 | ACGAGCACTACAGCACACATGC | AATGCTGCAACCTCTTCTTCTCC | 144 |
表1 突变体eb6基因精细定位所用分子标记
Table 1 Markers for fine mapping of eb6.
标记 Marker | 正向引物序列 Forward(5′-3′) | 反向引物序列 Reverse(5′-3′) | 片段大小 Product size/bp |
---|---|---|---|
RM7405 | TTGGCTCGCCCATATATAGG | CAGTCAGTCATCACTGGTAGTCG | 92 |
RM7341 | GCTTTGCTTGGTGGTCATTC | TGCAAGCTGAGTGTGAAACC | 145 |
M1 | TGCAACTTCTAGCTGCTCGA | GCATCCGATCTTGATGGG | 112 |
M2 | ACACCGCACCTAAACCCAAGACC | AGGCGCGTGAGAGAGGAATGG | 151 |
M4 | GACAACAATGGCCTCATCTTCC | GTCGTCGTCCTCGTAGTTCACG | 99 |
M5 | CCAGTGCACAACAGCACAAGC | GTTGGCTACTTGGCTTTCGATGG | 151 |
M7 | GTTCGTTTCCGAGATGTCACTGG | CGGGAGAGGGTACGATGAGTACG | 157 |
M10 | CTCCCCTTGTATTGGTAGA | TGAGAAACATCATACTCCATA | 174 |
M11 | CTCCCTCCCCAGGCAAGCAC | TGCAGCACAGACACGAGACC | 106 |
M12 | CATAACCCTGAAGTGGTGTGACG | GTGCTTGATGATATGGTCCTTGC | 149 |
M13 | GGAACTGCAGATTTGATGGAGAGG | CATATTCCACTGGGCGTCTGG | 106 |
M16 | AAAGCCTGGATAAGATGGTTCG | CTGTAGTTGCTGTTTGCCTGTCC | 124 |
M17 | GTGGAGGAGCGAAGGGAACACG | CCTCCCATATAAACCGGCGAACC | 140 |
M19 | ACGAGCACTACAGCACACATGC | AATGCTGCAACCTCTTCTTCTCC | 144 |
引物名称 Primer name | 登录号 Accession number | 正向引物序列 Forward(5′-3′) | 反向引物序列 Reverse(5′-3′) | |
---|---|---|---|---|
Actin | X16280 | CATGCTATCCCTCGTCTCGACCT | CGCACTTCATGATGGAGTTGTAT | |
OsAGPS1 | AK073146 | AGAATGCTCGTATTGGAGAAAATG | GGCAGCATGGAATAAACCAC | |
OsAGPS2a | AK071826 | ACTCCAAGAGCTCGCAGACC | GCCTGTAGTTGGCACCCAGA | |
OsAGPS2b | AK103906 | AACAATCGAAGCGCGAGAAA | GCCTGTAGTTGGCACCCAGA | |
OsAGPL1 | AK069296 | GGAAGACGGATGATCGAGAAAG | CACATGAGATGCACCAACGA | |
OsAGPL2 | AK071497 | GTTACTGGAACTGCACGATG | CTCCACCCAAAATGACAGC | |
OsAGPL3 | AK100910 | AAGCCAGCCATGACCATTTG | CACACGGTAGATTCACGAGACAA | |
OsAGPL4 | AK121036 | TCAACGTCGATGCAGCAAAT | ATCCCTCAGTTCCTAGCCTCATT | |
GBSSⅠ | AK070431 | TCCGAGAGGTTCAGGTCATC | ATGAGCTCCTCGGCGTAGTA | |
OsSSI | AK109458 | GGGCCTTCATGGATCAACC | CCGCTTCAAGCATCCTCATC | |
OsSSⅡa | AF419099 | GCTTCCGGTTTGTGTGTTCA | CTTAATACTCCCTCAACTCCACCAT | |
OsISA1 | AB093426 | TGCTCAGCTACTCCTCCATCATC | AGGACCGCACAACTTCAACATA | |
OsISA2 | AC132483 | TAGAGGTCCTCTTGGAGG | AATCAGCTTCTGAGTCACCG | |
OsISA3 | AP005574 | ACAGCTTGAGACACTGGGTTGAG | GCATCAAGAGGACAACCATCTG | |
OsBEI | AK068920 | CAAACTTTGACTAACAGGAGA | TTGATGGTAGGTGAAGCAG | |
OsBEⅡb | AK108535 | ATGCTAGAGTTTGACCGC | AGTGTGATGGATCCTGCC | |
OsPHOL | AK063766 | TTGGCAGGAAGGTTTCGCT | CGAAGCCTGAAGTGAACTTGCT |
表2 淀粉合成相关基因实时荧光定量PCR分析所用的引物
Table 2 Primers associated with starch synthesis used in RT-PCR.
引物名称 Primer name | 登录号 Accession number | 正向引物序列 Forward(5′-3′) | 反向引物序列 Reverse(5′-3′) | |
---|---|---|---|---|
Actin | X16280 | CATGCTATCCCTCGTCTCGACCT | CGCACTTCATGATGGAGTTGTAT | |
OsAGPS1 | AK073146 | AGAATGCTCGTATTGGAGAAAATG | GGCAGCATGGAATAAACCAC | |
OsAGPS2a | AK071826 | ACTCCAAGAGCTCGCAGACC | GCCTGTAGTTGGCACCCAGA | |
OsAGPS2b | AK103906 | AACAATCGAAGCGCGAGAAA | GCCTGTAGTTGGCACCCAGA | |
OsAGPL1 | AK069296 | GGAAGACGGATGATCGAGAAAG | CACATGAGATGCACCAACGA | |
OsAGPL2 | AK071497 | GTTACTGGAACTGCACGATG | CTCCACCCAAAATGACAGC | |
OsAGPL3 | AK100910 | AAGCCAGCCATGACCATTTG | CACACGGTAGATTCACGAGACAA | |
OsAGPL4 | AK121036 | TCAACGTCGATGCAGCAAAT | ATCCCTCAGTTCCTAGCCTCATT | |
GBSSⅠ | AK070431 | TCCGAGAGGTTCAGGTCATC | ATGAGCTCCTCGGCGTAGTA | |
OsSSI | AK109458 | GGGCCTTCATGGATCAACC | CCGCTTCAAGCATCCTCATC | |
OsSSⅡa | AF419099 | GCTTCCGGTTTGTGTGTTCA | CTTAATACTCCCTCAACTCCACCAT | |
OsISA1 | AB093426 | TGCTCAGCTACTCCTCCATCATC | AGGACCGCACAACTTCAACATA | |
OsISA2 | AC132483 | TAGAGGTCCTCTTGGAGG | AATCAGCTTCTGAGTCACCG | |
OsISA3 | AP005574 | ACAGCTTGAGACACTGGGTTGAG | GCATCAAGAGGACAACCATCTG | |
OsBEI | AK068920 | CAAACTTTGACTAACAGGAGA | TTGATGGTAGGTGAAGCAG | |
OsBEⅡb | AK108535 | ATGCTAGAGTTTGACCGC | AGTGTGATGGATCCTGCC | |
OsPHOL | AK063766 | TTGGCAGGAAGGTTTCGCT | CGAAGCCTGAAGTGAACTTGCT |
杂交组合 Cross | 野生型植株 Number of wild type plants | 突变体植株 Number of mutant plants | χ2(3:1 ) |
---|---|---|---|
eb6/南京11 eb6/Nanjing 11 | 310 | 119 | 1.72 |
eb7/93-11 | 253 | 96 | 1.17 |
表3 突变基因eb6的遗传分析
Table 3 Genetic analysis of the eb6.
杂交组合 Cross | 野生型植株 Number of wild type plants | 突变体植株 Number of mutant plants | χ2(3:1 ) |
---|---|---|---|
eb6/南京11 eb6/Nanjing 11 | 310 | 119 | 1.72 |
eb7/93-11 | 253 | 96 | 1.17 |
图7 野生型和突变体在种子发育过程胚乳中淀粉合成相关基因定量表达分析
Fig. 7. Expression profiles of starch synthesis genes during seed development in the wild type(WT) and the mutants.
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