Evaluation on Alkaline Resistance of 14 Xinjiang Gossypium hirsutum at Germination Stage Based on Kmeans Clustering
In order to understand the difference of alkaline resistance of Xinjiang Gossypium hirsutum varieties at germination stage,the sand culture method was used to treat 14 Gossypium hirsutum varieties with Na2CO3 alkali stress at different concentrations(0,25,50,75,100 mmol/L)at germi-nation stage,and the indexes related to alkaline resistance of Gossypium hirsutum were determined.The alkaline tolerance of the germination was ranked by principal component analysis,membership function evaluation and Kmeans cluster analysis.The results showed that the germination rate,germination potential,germination index,plant height,root length,dry weight,fresh weight and relative water content of Gossypium hirsutum seeds decreased with the increase of alkali concentra-tion.The alkali resistance of 14 Xinjiang Gossypium hirsutum cultivars at germination stage was eval-uated comprehensively by using membership function and weight coefficient method.The 14 Gossypi-um hirsutum cultivars were classified into 4 types by Kmeans clustering analysis based on D value.Class Ⅰ had 2 germplasm materials with D value of 0.296,which belonged to alkali sensitive materi-als.There were 3 germplasm materials in Class Ⅱ with D value of 0.535,which belonged to weak alkali resistant type.There were 5 germplasm materials in Class Ⅲ,and the D value was 0.684,which belonged to medium alkali resistant materials.There were 4 germplasm materials in Class Ⅳwith D value of 0.788,which belonged to alkali-resistant materials.
万方数据
维普
