马铃薯块茎顶端优势与主茎数及产量组分的相关性

马铃薯块茎产量性状复杂,由多个产量组分构成.为探究马铃薯块茎不同顶端优势类型、植株主茎数和产量组分的相关性,本研究对国际马铃薯中心引进的102份高代品系块茎的发芽情况进行筛选,以12个顶端优势强弱程度不同的马铃薯品系为试验材料,在马铃薯植株盛花期测定主茎数;收获期统计小区产量、小区大薯产量、小区小薯产量、单株产量、单株...

Relationships Among Apical Dominance of Potato Tuber,the Number of Main Stem and Yield Components

Yield traits are complex agronomic traits,which are composed of multiple yield components.The aim of this study is to analyze the correlation among apical dominance,number of main stem and yield components of potato tuber,which would provide basis for potato breeding and cultivation mode selection.The potato tuber sprouting was screened in 102 advanced lines from The International Potato Center.Twelve representative potato lines with different apical dominance were used as materials in this study.The number of main stem was investigated during bloom period.The plot yield,plot yield of large tuber,plot yield of small tuber,yield of tuber per plant,yield of large tuber per plant,yield of small tuber per plant,number of tuber per plant,number of large tuber per plant and number of small tuber per plant were investigated during harvest period.The bud eye number,sprouting number and sprouting length of tubers were measured during storage period.The correlation among apical dominance,number of main stem and yield components of potato tuber were analyzed.The result showed that 12 potato lines were divided into four types based on the feature of tuber sprouting.There were significant differences in sprouting rate among four different tuber apical dominance types.There was no significant difference in sprouting length among four different tuber apical dominance types on the 90;day.The number of main stem,plot yield,plot yield of large tuber,yield of tuber per plant,yield of large tuber per plant,yield of small tuber per plant,number of tuber per plant,number of large tuber per plant and number of small tuber per plant were significantly different among four different tuber apical dominance types.However,there was no significant difference in the plot yield of small tuber.Variance analysis showed that the tuber apical dominance has significant effect on the number of main stem,yield of small tuber per plant,number of tuber per plant,number of large tuber per plant and number of small tuber per plant.Correlation analysis indicated that there was no significant correlation between number of main stem and yield components such as number of tuber per plant.Studying the correlation among potato yield components is important for breeding varieties with different tuberization characteristics,selection of cultivation modes in production,improvement of field management efficiency and yield increasing.