温室条件下向日葵（Helianthus annuus L.）光合作用和水分状况性状的QTL分析
QTL analysis of photosynthesis and water status traits in sunflower (Helianthus annuus L.) under greenhouse conditions.
作者信息
Hervé D, Fabre F, Berrios E F, Leroux N, Al Chaarani G, Planchon C, Sarrafi A, Gentzbittel L
机构信息
Laboratoire de Biotechnologie et Amélioration des Plantes, INP/ENSAT, Pôle de Biotechnologie Végétale, Chemin de Borde-Rouge, Auzeville, BP107, F-31326 Castanet-Tolosan cedex, France.
出版信息
J Exp Bot. 2001 Sep;52(362):1857-64. doi: 10.1093/jexbot/52.362.1857.
The identification of QTL for several physiological traits in sunflower is described. Traits related to photosynthesis (leaf chlorophyll concentration, net photosynthesis and internal CO(2) concentration) and water status (stomatal conductance, transpiration, predawn leaf water potential, and relative water content) were evaluated in a population of recombinant inbred lines under greenhouse conditions. Narrow-sense heritabilities were low to average. Using an AFLP linkage map, 19 QTL were detected explaining 8.8-62.9% of the phenotypic variance for each trait. Among these, two major QTL for net photosynthesis were identified on linkage group IX. One QTL co-location was found on linkage group VIII for stomatal movements and water status. Coincident locations for QTL regulating photosynthesis, transpiration and leaf water potential were described on linkage group XIV. These results lead to the first description of the organization of genomic regions related to yield in sunflower.
本文描述了向日葵中几个生理性状的QTL定位。在温室条件下，对一个重组自交系群体的光合作用相关性状（叶片叶绿素浓度、净光合作用和胞间CO₂浓度）和水分状况相关性状（气孔导度、蒸腾作用、黎明前叶片水势和相对含水量）进行了评估。狭义遗传力为低到中等水平。利用AFLP连锁图谱，检测到19个QTL，每个性状的表型变异解释率为8.8%-62.9%。其中，在连锁群IX上鉴定出两个控制净光合作用的主效QTL。在连锁群VIII上发现一个QTL共定位，与气孔运动和水分状况有关。在连锁群XIV上描述了调控光合作用、蒸腾作用和叶片水势的QTL的重合位置。这些结果首次描述了向日葵中与产量相关的基因组区域的组织情况。
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