文献类型： 外文期刊

作者： Liu, Yizhuo ¹ ; Song, Weiwei ¹ ; Song, Anning ¹ ; Wu, Chunfei ¹ ; Ding, Jiarui ¹ ; Yu, Xiaoning ² ; Song, Jia ¹ ; Liu, Miaomiao ¹ ; Yang, Xinyuan ¹ ; Jiang, Changtong ¹ ; Zhao, Haibin ³ ; Song, Weifu ⁴ ; Liu, Dongjun ⁴ ; Yang, Xuefeng ⁴ ; Song, Qingjie ⁴ ; Li, Xinling ¹ ; Cui, Lei ⁵ ; Li, Hongjie ⁶ ; Zhang, Yanming ¹ ;

作者机构： 1.Harbin Normal Univ, Coll Life Sci & Technol, Key Lab Mol Cytogenet & Genet Breeding Heilongjian, Harbin, Peoples R China

2.Heilongjiang Acad Agr Sci, Adm Secur Div, Harbin, Peoples R China

3.Heilongjiang Acad Agr Sci, Inst Pratacultural Sci, Harbin, Peoples R China

4.Heilongjiang Acad Agr Sci, Crop Resources Inst, Harbin, Peoples R China

5.Shanxi Agr Univ, Coll Agr, Taiyuan, Peoples R China

6.Chinese Acad Agr Sci, Inst Crop Sci, Natl Engn Lab Crop Mol Breeding, Beijing, Peoples R China

关键词： Thinopyrum intermedium; wheatgrass; chromosome; sequential multicolor GISH; subgenome

期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：5.6； 五年影响因子：6.8 ）

ISSN： 1664-462X

年卷期： 2023 年 14 卷

页码：

收录情况： SCI

摘要： Thinopyrum intermedium (2n=6x=42, StStJ (R) J (R) J(vs)J(vs)) is resistant or tolerant to biotic and abiotic stresses, making it suitable for developing perennial crops and forage. Through five cycles of selection, we developed 24 perennial wheatgrass lines, designated 19HSC-Q and 20HSC-Z, by crossing wheat-Th. intermedium partial amphiploids with Th. intermedium. The cold resistance, morphological performance, chromosome composition, and yield components of these perennial lines were investigated from 2019 to 2022. Six lines of 19HSC-Q had higher 1,000-kernel weight, grains per spike, and tiller number than Th. intermedium, as well as surviving -30 degrees C in winter. Lines 19HSC-Q14, 19HSC-Q18, and 19HSC-Q20 had the best performances for grain number per spike and 1,000-kernel weight. The 20HSC-Z lines, 20HSC-Z1, 20HSC-Z2, and 20HSC-Z3, were able to survive in the cold winter in Harbin and had been grown for two years. Sequential multicolor GISH analysis revealed that the J(vs) subgenome of Th. intermedium were divided into two karyotypes, three pairs of type-I J(vs) chromosomes and four pairs of type-II J(vs) chromosomes. Both Th. intermedium and the 24 advanced perennial wheatgrass lines had similar chromosome compositions, but the translocations among subgenome chromosomes were detected in some lines with prominent agronomic traits, such as 19HSC-Q11, 19HSC-Q14, 19HSC-Q18, 19HSC-Q20, and the three 20HSC-Z lines. The chromosome aberrations were distinguished into two types: the large fragment translocation with St-J (R), J(vs)-St, J (R)-IIJ(vs), and J(vs)-J (R) and the small fragment introgression of J (R)-St, St-IJ(vs,) and J(vs)-J (R). These chromosomal variations can be used to further analyze the relationship between the subgenomes and phenotypes of Th. intermedium. The results of this study provide valuable materials for the next selection cycle of cold-resistant perennial wheatgrass.