摘要
利用LI-6400XT便携式光合仪,测定盛花期17个马铃薯品种(系)倒四叶的顶小叶的光响应曲线和CO2响应曲线,并使用直角双曲线模型拟合光合参数。结果表明,马铃薯品种(系)间的光合性状均达到极显著差异;利用主因素分析,在方差累计贡献率为86.58%时,筛选出对划分马铃薯光合类别有显著影响的6个主导因子,即最大净光合速率(Amax)、光补偿点(Ic)、暗呼吸速率(Rd)、初始羧化效率(CE)、叶片蒸腾速率(Tr)、气孔导度(Cond.)。以6个光合性状进行聚类分析和判别分析,可以将马铃薯17品种(系)分为4大类,建立4个判别能力较高的判别模型。通过对综合性状的评价,选出具有较高净光合速率、特别耐阴、较低消耗、中等蒸腾速率、较高气孔导度、中等初始羧化效率的D类5个高光效品种(系),即合作88、D520、东农1014III03、青薯9号和2010-11。
The light response curve and CO2 response curve of 17 potato varieties （lines） at the full-bloom stage were measuredby using the LI-6400XT （a portable photosynthetic apparatus）, and photosynthetic parameters were calculated fitting with a rectangularHyperbola model. There were significant differences among different varieties （lines） in photosynthetic traits. Usingprincipal factor analysis method, six photosynthetic parameters which had a significant impact on photosynthetic type of potatowere selected when the cumulative contribution of variance accounted for 86.58%, including maximum net photosynthetic rate（Amax）, light compensation point （Ic）, dark respiration rate （Rd）, initial efficiency of carboxylation （CE）, leaf transpiration rate （Tr）,and stomatal conductance （Cond.）. According to the cluster and discriminant analysis of the six photosynthetic characteristics, 17varieties （lines） of potato were divided into four categories. After comprehensive evaluation of the traits, five high photosyntheticefficiency varieties （lines） which belong to D class were picked out. These varieties showed higher net photosynthetic rate,stronger shade tolerance, lower consumption, moderate transpiration rate, higher stomatal conductance and medium initial carboxylationefficiency. They were Hezuo 88, D520, Dongnong 1014III03, Qingshu 9, and 2010-11, which can be regarded as highphotosynthetic efficiency breeding.
出处
《作物学报》
CAS
CSCD
北大核心
2017年第7期1067-1076,共10页
Acta Agronomica Sinica
基金
国家现代农业产业技术体系建设专项(CARS-10-P21)
云南省马铃薯重大种业专项(2013ZA007)资助~~
关键词
马铃薯
光合参数
聚类分析
判别函数
高光效育种
Potato
Photosynthetic parameter
Clustering analysis
Discriminant function
High photosynthetic efficiency
