中国水稻科学 ›› 2021, Vol. 35 ›› Issue (1): 19-26.DOI: 10.16819/j.1001-7216.2021.0702
收稿日期:
2020-07-02
修回日期:
2020-07-27
出版日期:
2021-01-10
发布日期:
2021-01-10
通讯作者:
施勇烽
基金资助:
Zhonghao WANG, Yan HE, Xiaobo ZHANG, Xia XU, WUJianli, SHIYongfeng*()
Received:
2020-07-02
Revised:
2020-07-27
Online:
2021-01-10
Published:
2021-01-10
Contact:
SHIYongfeng
摘要: 目的 通过对水稻转绿和穗顶端退化等突变体的研究,可以鉴定更多与叶绿体发育和穗发育相关的基因。方法 在常规种植条件下比较突变体vpa1(virescent and panicle abortion 1)表型及主要农艺性状差异,利用分离群体分析和图位克隆法进行相关基因定位。结果 突变体vpa1表现苗期白化,并逐渐转绿恢复成正常叶色,抽穗后可明显观查到穗顶端退化表型。vpa1的主要农艺性状除了结实率以外,株高、穗长、每穗实粒数等均较野生型显著下降。遗传分析表明白化转绿和穗顶端退化表型受独立的两个隐性基因控制。控制白化转绿叶性状的Osv16定位于第3染色体RM3441和RM3029之间约125kb物理区间内,区间内未见白化转绿性状相关基因的报道。控制穗顶端退化性状的Ospaa10定位于第1染色体RM11157和RM5972之间,区间内物理距离约190kb,区间内未见穗顶端退化相关基因的报道。结论 Osv16和Ospaa10两个基因的突变导致vpa1的叶色和穗型同时出现变异,为白化转绿基因Osv16和穗顶端退化基因Ospaa10的克隆和功能研究打下了基础。
王中豪, 贺彦, 张晓波, 徐霞, 吴建利, 施勇烽. 水稻白化转绿和穗顶端退化突变体vpa1的遗传分析和基因定位[J]. 中国水稻科学, 2021, 35(1): 19-26.
Zhonghao WANG, Yan HE, Xiaobo ZHANG, Xia XU, WUJianli, SHIYongfeng. Genetic Analysis and Gene Mapping of a Virescent and Panicle AbortionMutant vpa1in Rice[J]. Chinese Journal OF Rice Science, 2021, 35(1): 19-26.
图1 突变体vpa1及其野生型在苗期和抽穗期的表型 A-播种10 d后vpa1和野生型IR64的表型,标尺为2 cm;B-vpa1和野生型IR64在抽穗期的表型,标尺为20 cm;C-vpa1和野生型剑叶表型比较,标尺为2 cm;D-vpa1和野生型IR64的穗部表型比较,标尺为4 cm。
Fig. 1. Performance of vpa1 and wild type at the seedling and heading stages. A,vpa1 and its wild type(WT) at 10 days after sowing. Scale bar=2 cm; B,vpa1 and WT at the heading stage. Scale bar=20 cm; C,Flag leavesofvpa1 and WT. Scale bar=2cm; D,Paniclesofvpa1 and WT. Scale bar= 4cm.
材料 Material | 株高 Plant height/cm | 穗长 Panicle length /cm | 有效穗数 No.of tillers per plant | 每穗实粒数 No.of filledgrains per panicle | 结实率 Seed-setting rate / % | 千粒重 1000-grain weight / g |
---|---|---|---|---|---|---|
WT | 107.7±2.1 | 26.0±1.0 | 17.7±0.6 | 84.9±2.3 | 61.6±0.9 | 27.0±0.1 |
vpa1 | 91.7±1.5** | 18.8±0.8** | 13.3±2.1* | 58.3±2.2** | 62.6±3.3 | 21.4±0.4** |
表1 突变体vpa1和野生型IR64的主要农艺性状
Table l. Comparison of agronomnic traits between vpa1 and the wild-type.
材料 Material | 株高 Plant height/cm | 穗长 Panicle length /cm | 有效穗数 No.of tillers per plant | 每穗实粒数 No.of filledgrains per panicle | 结实率 Seed-setting rate / % | 千粒重 1000-grain weight / g |
---|---|---|---|---|---|---|
WT | 107.7±2.1 | 26.0±1.0 | 17.7±0.6 | 84.9±2.3 | 61.6±0.9 | 27.0±0.1 |
vpa1 | 91.7±1.5** | 18.8±0.8** | 13.3±2.1* | 58.3±2.2** | 62.6±3.3 | 21.4±0.4** |
图2 不同时期vpa1和野生型IR64叶片光合色素含量的比较 A-播种后2周vpa1和野生型IR64的色素含量;B-播种后8周vpa1和野生型IR64的色素含量;C-播种后14周vpa1和野生型IR64的色素含量;误差线表示3次生物学重复试验的标准差,*和**分别表示野生型和vpa1之间差异达0.05和0.01显著水平(t检验)。
Fig. 2. Comparison of pigment contents between vpa1 and WT at different growth stages. A, Pigment contents of vpa1 and WT at two weeks after sowing; B, Pigment contents of vpa1 and WT at eight weeks after sowing; C, Pigment contents of vpa1 and WT at 14 weeks after sowing; The values are means ± SD (n = 3). The asterisks indicate significant difference between vpa1 and WT according to the Student’s t-test(*P≤0.05; **P≤0.01).
杂交组合Cross | F1 | F2 | χ23:1 | ||
---|---|---|---|---|---|
正常叶色株数 No.of normal plants | 白化转绿株数 No.of virescent plants | 总株数 Total no. of plants | |||
vpa1/IR64 | 正常叶色Green | 726 | 254 | 980 | 0.44 |
vpa1/Moroberekan | 正常叶色Green | 3892 | 1372 | 5264 | 3.18 |
表2 vpa1中转绿叶性状的遗传分析
Table 2 Genetic analysis of the virescent leaf in vpa1.
杂交组合Cross | F1 | F2 | χ23:1 | ||
---|---|---|---|---|---|
正常叶色株数 No.of normal plants | 白化转绿株数 No.of virescent plants | 总株数 Total no. of plants | |||
vpa1/IR64 | 正常叶色Green | 726 | 254 | 980 | 0.44 |
vpa1/Moroberekan | 正常叶色Green | 3892 | 1372 | 5264 | 3.18 |
杂交组合 Cross | F1 | F2 | χ23:1 | ||
---|---|---|---|---|---|
正常穗型株数 No.of normal panicle plants | 顶端退化株数 No. of paaplants | 总株数 Total no.of plants | |||
vpa1/IR64 | 正常穗型Normal panicle | 565 | 155 | 720 | 3.58 |
vpa1/Moroberekan | 正常穗型Normal panicle | 1181 | 254 | 1435 | 40.78 |
表3 vpa1中穗顶端退化性状的遗传分析
Table 3 Genetic analysis of the paatrait in vpa1.
杂交组合 Cross | F1 | F2 | χ23:1 | ||
---|---|---|---|---|---|
正常穗型株数 No.of normal panicle plants | 顶端退化株数 No. of paaplants | 总株数 Total no.of plants | |||
vpa1/IR64 | 正常穗型Normal panicle | 565 | 155 | 720 | 3.58 |
vpa1/Moroberekan | 正常穗型Normal panicle | 1181 | 254 | 1435 | 40.78 |
图3 白化转绿基因Osv16在第3染色体上的定位 A-白化转绿基因Osv16的初步定位;B,C-白化转绿基因Osv16的精细定位。
Fig. 3. Location of Osv16 on chromosome 3. A, Preliminary localization of Osv16 gene; B andC, Fine mapping of Osv16 gene.
图4 穗顶端退化基因Ospaa10在第1染色体上的定位 A-穗顶端退化基因Ospaa10的初步定位;B, C-穗顶端退化基因Ospaa10的精细定位。
Fig. 4. Location of Ospaa10 on chromosome 1. A, Preliminary localization of Ospaa10 gene; B and C, Fine mapping of Ospaa10 gene.
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