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- Title
21份披碱草农艺性状与产量形成的相关性分析.
- Authors
王旭成; 王 琴; 宋文学; 王 星; 王 晶; 伏兵哲; 高雪芹
- Abstract
[Objective] This study investigated the characteristics of different Elymus dahuricus germplasms to screen elite germplasm materials of E. dahuricus.[Method] A total of 21 E. dahuricus germplasms from different sources were selected and 17 agronomic indicators were measured to study the variations of main agronomic characters of E. dahuricus through statistical analysis such as correlation, principal component, multiple stepwise regression, and clustering. The main factors influencing yield formation of E. dahuricus were clarified. [Result! The variations of agronomic characters of E. dahuricus were rich, and the coefficients of variation ranged from 11. 07% (inflorescence length) to 45. 53% (basal stem length). Correlation analysis showed that hay yield per plant had significantly positive correlation with basal stem length and flag leaf length (P<0. 05), and seed yield per plant had significantly positive correlation with tiller number and thousand-grain weight (P<0. 01). Multiple stepwise regression and path analysis showed that plant height, stem diameter, basal stem length, stem length under panicle, flag leaf width, length of the second leaf, sheath length of the second leaf, width of the second leaf, inflorescence length, spikelet length, and stem-to-leaf ratio were the main factors affecting the hay yield per plant>among which stem diameter, base stem length, underear stem length, flag leaf width, leaf sheath length, spikelet length, and stem-leaf ratio had direct contributions. Plant height, length of the second leaf sheath, length of the spikelet, number of tillers and thousand-grain weight were the main factors affecting seed yield per plant, among which length of spikelet and number of tillers had direct effects. The principal component analysis showed that the cumulative contribution rate of the first five principal components reached 79. 304%. According to the first and second main components, Seven E. dahuricus germplasm materials of PJC09, PJC14, PJC15, PJC17, PJC18, PJC26, and PJC27 with high hay yield and seed yield per plant were screened. The average hay yield per plant was 197. 02 g, and the seed yield per plant was 21. 39 g. Cluster analysis showed that 21 accessions of E. dahuricus germplasm were clustered into 3 categories: category I contained 2 germplasms for screening high seed yield per plant, category H included 10 germplasms for screening high hay yield and seed yield per plant, category HI contained 9 germplasm materials for screening specific germplasm according to breeding goal. [ConclusionJ This study determined 11 main factors affecting hay yield per plant and 5 main factors affecting seed yield per plant. Seven E. dahuricus germplasm materials with excellent hay yield per plant and seed yield per plant were also screened.
- Subjects
PLANT yields; STATISTICAL correlation; PRINCIPAL components analysis; PATH analysis (Statistics); CLUSTER analysis (Statistics); SEED yield; INFLORESCENCES
- Publication
Journal of Northwest A & F University - Natural Science Edition, 2023, Vol 51, Issue 5, p8
- ISSN
1671-9387
- Publication type
Article
- DOI
10.13207/j.cnki.jnwafu.2023.05.002