摘要
为了提高叶菜型甘薯新品系选育效率,探讨变异系数对叶菜型甘薯新品系选育的影响,以7个叶菜型甘薯品系为试验材料,研究其不同采摘期各品系间、各品系不同采摘期间及不同品系各重复间的茎尖数量、茎尖产量及其变异系数,并对茎尖性状及变异系数进行相关性分析。结果表明,叶菜型甘薯新品系茎尖性状的变异系数由大到小依次为各品系不同采摘期间、不同采摘期各品系间、不同品系各重复间;高产稳产新品系在各采摘期间的茎尖产量和茎尖数量的变异系数普遍较高,而重复间的变异系数较低;品系2019-1-15、2018-2-76、2018-2-37的茎尖产量比对照品种福薯7-6高,且产量差异达极显著水平(P<0.01);叶菜型甘薯茎尖数量与茎尖产量呈极显著正相关(r=0.5589,P<0.01),茎尖数量变异系数与茎尖产量变异系数呈极显著正相关(r=0.6683,P<0.01)。由此得出,变异系数对叶菜型甘薯新品系选育有重要意义,在高产稳产叶菜型甘薯新品系选育过程中,可以优先选择茎尖数量多的新品系,并综合考虑其茎尖产量和茎尖产量变异系数的影响;2019-1-15、2018-2-76、2018-2-37是相对高产稳产的叶菜型甘薯新品系。
In order to improve the breeding efficiency of new lines of leafy vegetable sweet potato and explore the influence of variation coefficient on the breeding of new lines of leafy vegetable sweet potato,seven leafy vegetable sweet potato lines were used as experi-mental materials to study the number and yield of shoot tips and their variation coefficients among different lines at different picking times,among different picking times of different lines,and among different replicates of different lines,and the correlation analysis of characters of shoot tips and variation coefficient was carried out.The results showed that the variation coefficient of shoot tip traits of new lines of leafy vegetable sweet potato was from large to small in the order of different picking times of different lines,different lines at different picking times,and different repetitions of different lines.The variation coefficient of the yield and number of shoot tips of high and stable yield lines was generally high,but the variation coefficient between repeats was low.The yield of shoot tips of lines 2019-1-15,2018-2-76 and 2018-2-37 was higher than that of the control variety Fushu 7-6,and the yield difference reached a very significant level(P<0.01).There was a significant positive correlation between the number of shoot tips and the yield of shoot tips(r=0.5589,P<0.01),and a significant positive correlation between variation coefficient of the number of shoot tips and variation coef-ficient of the yield of shoot tips(r=0.6683,P<0.01).It was concluded that the variation coefficient played an important role in the breeding of leafy vegetable sweet potato lines.In the process of breeding new lines of high and stable yield leafy vegetable sweet pota-to,the new lines with a large number of stem tips could be preferentially selected,and the effects of the yield of shoot tips and its varia-tion coefficient could be comprehensively considered.2019-1-15,2018-2-76 and 2018-2-37 were new lines of leafy vegetable sweet potato with relatively high and stable yields.
作者
李保证
肖波
曾新宇
徐茜
LI Bao-zheng;XIAO Bo;ZENG Xin-yu;XU Qian(Chongqing Three Gorges Academy of Agricultural Science,Chongqing 404155,China)
出处
《湖北农业科学》
2024年第5期1-5,49,共6页
Hubei Agricultural Sciences
基金
重庆市技术创新与应用发展专项重点项目(cstc2019jscx-gksbX0100)
重庆市科企联合体-薯类作物种质资源收集利用与品种试验。
关键词
叶菜型甘薯
选育
采摘期
茎尖数量
茎尖产量
茎尖数量变异系数
茎尖产量变异系数
leafy vegetable sweet potato
breeding
picking times
number of shoot tips
yield of shoot tips
variation coefficient of the number of shoot tips
variation coefficient of the yield of shoot tips
