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Journal of Zhejiang University (Agriculture and Life Sciences)  2022, Vol. 48 Issue (1): 21-28    DOI: 10.3785/j.issn.1008-9209.2021.03.082
Horticultural sciences     
Analysis of germplasm resources by simple sequence repeat markers in Cymbidium hybridum
Hongzhe SHEN1(),Chunnan LI2,Qiaojuan FU2,Hairui CUI1()
1.Institute of Nuclear-Agricultural Science, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China
2.Institute of Horticulture, Hangzhou Academy of Agricultural Sciences, Hangzhou 310024, China
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Abstract  

Sixty-eight simple sequence repeat (SSR) primer pairs were designed based on the transcriptome data of Cymbidium faberi and 25 primer pairs with stable amplification and better polymorphism were selected for genetic diversity analysis of 41 C. hybridum cultivars. The results showed that a total of 187 SSR bands were amplified, and 171 (91.44%) of them were polymorphic with the average of 6.84 bands per primer pair. The mean value of polymorphism information content (PIC) and the number of genotypes per SSR marker were 0.770 3 and 12.88, respectively. Genetic similarity coefficient among 41 cultivars ranged from 0.57 to 0.99 with an average of 0.72. A dendrogram of genetic relationship constructed using unweighted pair-group method with arithmetic mean (UPGMA) showed that the tested accessions could be classified into five clustering groups with the similarity coefficient of 0.71, which were consistent to some extent with the plant size, branch type and flower color. The above results reveal the genetic diversity and relationships among the tested accessions. The newly developed SSR markers will be useful tools for molecular breeding of C.hybridum.



Key wordsCymbidium hybridum      simple sequence repeat      genetic diversity      cluster analysis     
Received: 08 March 2021      Published: 04 March 2022
CLC:  Q 75  
Corresponding Authors: Hairui CUI     E-mail: 21816004@zju.edu.cn;hrcui@zju.edu.cn
Cite this article:

Hongzhe SHEN,Chunnan LI,Qiaojuan FU,Hairui CUI. Analysis of germplasm resources by simple sequence repeat markers in Cymbidium hybridum. Journal of Zhejiang University (Agriculture and Life Sciences), 2022, 48(1): 21-28.

URL:

https://www.zjujournals.com/agr/10.3785/j.issn.1008-9209.2021.03.082     OR     https://www.zjujournals.com/agr/Y2022/V48/I1/21


大花蕙兰种质资源的简单重复序列标记分析

利用蕙兰(Cymbidium faberi)转录组数据设计了68对微卫星即简单重复序列(simple sequence repeat, SSR)标记引物,从中筛选25对扩增稳定、多态性好的引物,并对41个大花蕙兰(C. hybridum)品种的遗传多样性进行了分析。结果显示:试验共扩增出187个条带,其中171条(占91.44%)为多态性条带,平均每对引物扩增多态性条带6.84条;平均每对SSR标记显示的多态性信息含量值和基因型数分别为0.770 3和12.88。41份大花蕙兰种质资源之间的遗传相似系数为0.57~0.99,平均值为0.72。利用非加权成对算术平均法建立了聚类图,在遗传相似系数0.71处可将供试材料分为5类,分类结果与植株大小、花枝类型及花色等性状相关。上述分析结果较好地揭示了大花蕙兰品种间的遗传多样性与亲缘关系,这些新开发的SSR标记可为大花蕙兰分子育种提供有用的工具。


关键词: 大花蕙兰,  简单重复序列,  遗传多样性,  聚类分析 

编号

No.

品种

Cultivar

株型

Plant type

植株大小

Plant size

花色

Flower color

1黄金岁月披散黄色
2九五之尊直立红色
3990半直立浅绿色
4义大蕙5披散深紫红色
5JOIC半直立浅绿色
6834半直立绿色
7KK560半直立黄绿色
8义蕙4直立黄色
91056披散红色
10义蕙1直立深绿色
11义大蕙2半直立深黄色
12粉荷半直立粉色
13523披散深黄色
14亲王披散淡绿色
15712半直立淡黄色
16义蕙3直立深黄色
17718披散奶白色
18天之骄子半直立黄绿色
19YX52半直立黄色
201054半直立红色
21875直立粉红色
22义大蕙7披散粉紫色
23义大蕙9直立黄绿色
24义大蕙3半直立黄色
25垂兰1披散黄褐色
26义蕙2半直立深黄色
27义大蕙8半直立黄绿色
28义大蕙1半直立土黄色
29101半直立绿色
30DH887半直立绿色
31义大蕙6披散紫红色
32小翠披散绿色
33YN-4-4披散白色
34YN-4-5披散白色
35YN-4-2披散白色
36YN-4-6披散白色
37YN-3半直立粉白色
38六朝金粉披散粉色
39YN-1披散粉色
40YN-2披散白色
41YN-2-2披散白色
Table 1 Cultivars and characteristics of C. hybridum used in this study

基序类型

Motif type

数量

Number

占总SSR的比例

Proportion in all

SSR/%

频率

Frequency/%

总计 Total9 473100.005.99

单核苷酸

Mononucleotide

5395.690.34

二核苷酸

Dinucleotide

5 88762.143.72

三核苷酸

Trinucleotide

2 25923.851.43

四核苷酸

Tetranucleotide

5255.540.33

五核苷酸

Pentanucleotide

1781.880.11

六核苷酸

Hexanucleotide

850.900.05
Table 2 Frequency of SSR in C. faberi unigene sequences
Fig. 1 Agarose gel electrophoresis of PCR products from some SSR primer pairsM: 100-600 bp DNA marker; 1-12: PCR products of primers from SSR10 to SSR21.

标记

Marker

条带数

No. of band

多态性

条带数

No. of

polymorphic

band

多态性

比率

Poly-morphic

rate/%

等位基

因型数

No. of

allelic

genotype

多态性信息含量

PIC

SSR5141392.86240.937 5
SSR922100.0030.509 2
SSR1144100.0080.704 3
SSR149888.89100.753 1
SSR1588100.0080.694 8
SSR1688100.00170.911 4
SSR1788100.00210.879 2
SSR187685.71180.906 6
SSR254375.0060.641 3
SSR2966100.0090.743 6
SSR30131292.31150.882 8
SSR311212100.00180.900 7
SSR32111090.91200.909 0
SSR336583.3350.503 3
SSR3555100.00160.8757
SSR365360.0070.750 7
SSR391111100.00320.960 1
SSR424375.0050.612 7
SSR434375.0060.734 1
SSR44141285.71170.897 1
SSR506466.6770.641 3
SSR5144100.0050.680 5
SSR531414100.00310.957 8
SSR584375.0050.508 0
SSR6444100.0090.761 5
Table 3 Amplification of 25 polymorphic primer pairs

条带类型

Band type

条带编号

Band code

品种

Cultivar

特异性扩增条带

Specific amplified band

SSR14-5义大蕙6
SSR14-8义蕙1
SSR29-4垂兰1
SSR30-71056
SSR30-13YN-3
SSR32-7天之骄子
SSR44-11JOIC

特异性缺失条带

Specific deletion band

SSR15-51056
SSR15-8义蕙1
Table 4 Specific SSR bands showed in some cultivars
Fig. 2 Dendrogram constructed for 41 germplasms based on UPGMAPlease see the Table 1 for the cultivar name represented by the number in this figure.
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