Helianthus argophyllus is a wild species known as “silver sunflower”, which possesses several traits, including morphological traits that increase drought tolerance. Therefore, introgressions between chosen cultivated lines and two H. argophyllus accessions were made, and segregating generations were established. Important agronomic traits including single heading, high pollen fertility, silver canopy (indicating more cuticular wax), and content of cuticular waxes and oil were selected over six segregating generations. The resulting F₆ lines showed introgression of water saving traits, as they had lower excise leaf water loss, with comparable yield to standard checks. However, these F₆ lines were late maturing and showed poor flowering synchronization between the cultivated and introgressed lines. Introgressed line “D‐22” was particularly promising as a breeding line, with superior agronomic and drought resistance traits. This line had the potential to be used as an inbred parental line for introgression of drought resistance traits into elite sunflower germplasm. Combining ability analysis of the introgressed lines further showed their potential for heterosis breeding or to be used as parental lines in breeding programme.

中文翻译：

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菊芋×银杏种间杂交耐旱育种系的建立

向日葵是一种被称为“银葵花”的野生物种，具有多种性状，包括增加耐旱性的形态性状。因此，在选择的栽培品系与两个H. argophyllus种质之间进行了渗入，并建立了分离世代。在六个分离世代中选择了重要的农艺性状，包括单头抽穗，高花粉育性，银冠层（表明更多的表皮蜡）以及表皮蜡和油的含量。所得的F ₆系显示节水性状渗入，因为它们的消费性叶面水分损失较低，且产量与标准对照相当。但是，这些F ₆品系成熟较晚，在栽培和渗入品系之间开花同步性差。渗入系“ D-22”作为具有优良农艺和抗旱性状的育种系特别有前途。该品系有潜力用作自交亲本品系，将抗旱性状渗入优良向日葵种质中。渗入系的结合能力分析进一步显示了它们在杂种优势育种中的潜力或在育种计划中用作亲本系。