Use of introgression lines to determine the ecophysiological basis for changes in water use efficiency and yield in California processing tomatoes
Use of introgression lines to determine the ecophysiological basis for changes in water use efficiency and yield in California processing tomatoes
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DOI：
10.1071/fp13097
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发表时间：
2014-01-01
影响因子：
3
通讯作者：
Jackson, Louise E.
中科院分区：
文献类型：
--
作者：
Barrios-Masias, Felipe H.;Chetelat, Roger T.;Jackson, Louise E.
田间和温室试验研究了生长习性和叶片中叶绿体的存在对提高加州现代加工番茄（Solanum lycopersicum L.）个品种以白茄（Solanum pennellii Cor.）在栽培品种M82的遗传背景中，不同之处在于定位到染色体5上的区域的基因，包括SP 5G基因（确定的与半确定的（Det与SemiDet））和obv基因（存在（模糊的）与不存在（清晰的）叶脉叶绿体（Obs与Clr））。5个IL和M82代表4种基因组合中的3种（Det-Clr不可用）。Det-Obs离子导入系的叶、茎和地上总生物量较SemiDet-Clr离子导入系少，坐果和成熟早。收获时，总的水果生物量是没有不同的离子液体。Det-Obs ILs的光合速率和气孔导度分别比SemiDet-Clr ILs高4-7%和13-26%。SemiDet-Obs IL是生长和气体交换变量的中间值。Det-Obs ILs比SemiDet-Clr ILs具有较低的叶片N浓度和相似的每叶面积叶绿素含量（但每叶质量略高）。Obs性状与叶片气体交换相关性状的增益相关。研究表明，有限生长型品种具有紧凑的生长习性、较低的叶片生物量和较高的单位叶面积碳同化能力，是其增产的相关性状。开发新的渐渗文库将有助于理解理想表型的多性状效应。
Field and greenhouse studies examined the effects of growth habit and chloroplast presence in leaf veins for their role in increasing agronomic water use efficiency and yields of California modern processing tomato (Solanum lycopersicum L.) cultivars. Five introgression lines (ILs), made with Solanum pennellii Cor. in the genetic background of cultivar M82, differ in genes that map to a region on Chromosome 5, including the SP5G gene (determinate vs. semideterminate (Det vs. SemiDet)) and the obv gene (presence (obscure) vs. absence (clear) of leaf vein chloroplasts (Obs vs. Clr)). The five ILs andM82represented three of the four gene combinations (Det-Clr was unavailable). Det-Obs ILs had less leaf, stem and total aboveground biomass with earlier fruit set and ripening than SemiDet-Clr ILs. By harvest, total fruit biomass was not different among ILs. Photosynthetic rates and stomatal conductance were 4-7% and 13-26% higher, respectively, in Det-Obs ILs than SemiDet-Clr ILs. SemiDet-Obs ILs were intermediate for growth and gas exchange variables. The Det-Obs ILs had lower leaf N concentration and similar chlorophyll content per leaf area (but slightly higher per leaf mass) than SemiDet-Clr ILs. The Obs trait was associated with gains in leaf gas exchange-related traits. This study suggests that a more compact growth habit, less leaf biomass and higher C assimilation capacity per leaf area were relevant traits for the increased yields in cultivars with determinate growth. Developing new introgression libraries would contribute to understanding the multiple trait effects of desirable phenotypes.