小柯机器人

中国科学家绘制出高质量的黑麦基因组图谱
2021-03-21 23:40

河南农业大学王道文等研究人员合作绘制出高质量的黑麦基因组图谱。相关论文于2021年3月18日在线发表在《自然—遗传学》杂志上。

研究人员对中国优良黑麦品种威宁黑麦的基因组进行了测序。组装的重叠群(7.74 Gb)占估算基因组大小(7.86 Gb)的98.47%,其中重叠群(7.25 Gb)的93.67%分配给七个染色体。重复元件占组装基因组的90.31%。与先前测序的小麦的基因组相比,丹妮拉(Daniela)、苏马亚(Sumaya)和苏曼(Sumana)的反转录转座子在黑麦中显示出强大的扩增能力。

威宁组装的进一步分析为全基因组基因重复及其对淀粉生物合成基因的影响、复杂醇溶蛋白基因座的物理组织、早期抽穗特性和潜在驯化相关的染色体区域以及黑麦中基因座的基因表达特征提供了新的启示。该基因组序列有望加快黑麦和相关谷物作物的基因组和育种研究。 

据悉,黑麦是一种有价值的粮食和饲料作物,是小麦和黑小麦改良的重要遗传资源,也是在草中进行有效的比较基因组研究的必不可少的材料。

附:英文原文

Title: A high-quality genome assembly highlights rye genomic characteristics and agronomically important genes

Author: Guangwei Li, Lijian Wang, Jianping Yang, Hang He, Huaibing Jin, Xuming Li, Tianheng Ren, Zhenglong Ren, Feng Li, Xue Han, Xiaoge Zhao, Lingli Dong, Yiwen Li, Zhongping Song, Zehong Yan, Nannan Zheng, Cuilan Shi, Zhaohui Wang, Shuling Yang, Zijun Xiong, Menglan Zhang, Guanghua Sun, Xu Zheng, Mingyue Gou, Changmian Ji, Junkai Du, Hongkun Zheng, Jaroslav Doleel, Xing Wang Deng, Nils Stein, Qinghua Yang, Kunpu Zhang, Daowen Wang

Issue&Volume: 2021-03-18

Abstract: Rye is a valuable food and forage crop, an important genetic resource for wheat and triticale improvement and an indispensable material for efficient comparative genomic studies in grasses. Here, we sequenced the genome of Weining rye, an elite Chinese rye variety. The assembled contigs (7.74Gb) accounted for 98.47% of the estimated genome size (7.86Gb), with 93.67% of the contigs (7.25Gb) assigned to seven chromosomes. Repetitive elements constituted 90.31% of the assembled genome. Compared to previously sequenced Triticeae genomes, Daniela, Sumaya and Sumana retrotransposons showed strong expansion in rye. Further analyses of the Weining assembly shed new light on genome-wide gene duplications and their impact on starch biosynthesis genes, physical organization of complex prolamin loci, gene expression features underlying early heading trait and putative domestication-associated chromosomal regions and loci in rye. This genome sequence promises to accelerate genomic and breeding studies in rye and related cereal crops.

DOI: 10.1038/s41588-021-00808-z

Source: https://www.nature.com/articles/s41588-021-00808-z

Nature Genetics:《自然—遗传学》,创刊于1992年。隶属于施普林格·自然出版集团,最新IF:41.307
官方网址:https://www.nature.com/ng/
投稿链接:https://mts-ng.nature.com/cgi-bin/main.plex


本期文章:《自然—遗传学》:Online/在线发表

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