干旱区生态环境知识资源中心(Arid): Cytological Pattern Reveals Genome Downsizing in Cynodon dactylon (L.) Pers along the Longitudinal Gradient

Arid

DOI	10.3390/agronomy13081984
	Cytological Pattern Reveals Genome Downsizing in Cynodon dactylon (L.) Pers along the Longitudinal Gradient
	Li, Manqing; Wang, Miaoli; Zhang, Jingxue; Feng, Guilan; Noor, Maryam; Guo, Zhipeng; Guo, Yuxia; Guan, Yongzhuo; Yan, Xuebing
通讯作者	Yan, XB
来源期刊	AGRONOMY-BASEL
EISSN	2073-4395
出版年	2023
卷号	13 期号:8
英文摘要	Understanding the cytological pattern of genome size and ploidy level of the bermudagrass (Cynodon dactylon) is vital to explore the evolution pattern and breeding of the species. To study the diversification of the cytological pattern of bermudagrass along the longitudinal gradient, the genome size and ploidy level were measured and explored with the relationship to climate factors. The corresponding ploidy level was verified through the mitotic chromosome counts method. Bermudagrass accessions ploidy level included diploids, triploid, tetraploid, pentaploid and hexaploid with a basic chromosome number of x = 9. The major ploidy level was tetraploid (45%) and aneuploidy was commonly discovered in collected regions. Mean genome size of bermudagrasswas was estimated to be 1.31 pg/1Cx along longitudinal gradient. The 1Cx values of diploid were higher than that of triploid and tetraploid, while the tetraploid had minimum basic genome size. In the current study, we observed that genome downsizing exists in tetraploids of Cynodon dactylon. Tetraploids have a wider distribution than other ploidy levels, especially in arid areas, occupying a relatively high proportion. In addition, at the same ploidy level, genome size was remarkably variable in the current study. The coefficient of determination analysis showed that longitude and mean annual rainfall were significantly correlated to genome size rather than ploidy level. This cytological study will be helpful for further genetic mechanisms and molecular characteristics to landscape adaptation of bermudagrass.
英文关键词	Cynodon dactylon flow cytometry genome size polyploidy genome downsizing longitude climate
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:001055594300001
WOS关键词	NUCLEAR-DNA CONTENT ; EVOLUTIONARY CONSEQUENCES ; CONSTRAINT HYPOTHESIS ; FLOW-CYTOMETRY ; SIZE VARIATION ; PLOIDY LEVEL ; DIVERSITY ; POLYPLOIDY ; POLYMORPHISM ; ACCESSIONS
WOS类目	Agronomy ; Plant Sciences
WOS研究方向	Agriculture ; Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/395222
推荐引用方式 GB/T 7714	Li, Manqing,Wang, Miaoli,Zhang, Jingxue,et al. Cytological Pattern Reveals Genome Downsizing in Cynodon dactylon (L.) Pers along the Longitudinal Gradient[J],2023,13(8).
APA	Li, Manqing.,Wang, Miaoli.,Zhang, Jingxue.,Feng, Guilan.,Noor, Maryam.,...&Yan, Xuebing.(2023).Cytological Pattern Reveals Genome Downsizing in Cynodon dactylon (L.) Pers along the Longitudinal Gradient.AGRONOMY-BASEL,13(8).
MLA	Li, Manqing,et al."Cytological Pattern Reveals Genome Downsizing in Cynodon dactylon (L.) Pers along the Longitudinal Gradient".AGRONOMY-BASEL 13.8(2023).