Breeding and Application of Inbred Line of 'Xundan Series'Suitable for Machine Harvesting
The indigenous inbred line Zheng 58 was utilized as the foundational material for the development of an improved Reid inbred line,Xun658(Xun6586,XX6586).An improved inbred line,Xun1543(XX1543),character-ized by high yield,good quality,early maturity,and suitable grain harvest,was developed through a breeding pro-gram that involved crossing,backcrossing,and self-crossing with an introduced inbred line PH6WC.Additionally,the utilization of the high combining ability PH4CV as the foundational material,the temperate germplasm resource 515,and the native high resistance inbred line S122 backcross contributed to the development of the improved in-bred line and its sister inbred lines,Xun1541,Xun1544,and Xun5441,all of which exhibit high combining ability.Multi-generations of selfing were utilized to select for early maturity,good resistance,and high grain yield.The pres-ent study involved the fusion of foreign inbred lines with native germplasm to generate the"Xundan series"maize in-bred lines that are well-suited for grain harvest.Subsequently,several new inbred lines,namely Xundan 1538,Xun-dan1668,Xundan1618,Xundan1718,Xundan 56,and Wansheng106 were selected and bred.Among them,Wansh-eng106 and Xundan 1668 were specifically selected as machine-harvested varieties for national audit and provincial audits,respectively.
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