宜子粒收获浚单系列自交系的选育与应用

Breeding and Application of Inbred Line of ‘Xundan Series’ Suitable for Machine Harvesting

摘要:

选用本土自交系郑58为基础材料，通过与外引自交系PH6WC杂交、回交、自交选育出产量高、品质优、熟期早、宜子粒收获的改良Reid自交系浚658(浚系6586、XX6586)，以高配合力PH4CV为基础材料，利用温带种质资源515杂交，再用本土高抗性自交系 S122回交，经多代自交选育出配合力高、熟期早、抗性好、宜子粒收获的改良自交系浚1543(XX1543)及其姊妹自交系浚1541、浚系1544和浚5441。通过国外自交系与本土种质的融合，创制出宜子粒收获的浚单系列玉米自交系，直接利用创制的自交系选育出浚单1538、浚单1668、浚单1618、浚单1718、浚单56、万盛106等多个通过省审和国审玉米杂交种，万盛106、浚单1668分别为国审、省审机收品种。

Abstract:

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), characterized by high yield, good quality, early maturity, and suitable grain harvest, was developed through a breeding program 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 inbred 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 present study involved the fusion of foreign inbred lines with native germplasm to generate the "Xundan series" maize inbred lines that are well-suited for grain harvest. Subsequently, several new inbred lines, namely Xundan1538, Xundan1668, Xundan1618, Xundan1718, Xundan 56, and Wansheng106 were selected and bred. Among them, Wansheng106 and Xundan1668 were specifically selected as machine-harvested varieties for national audit and provincial audits, respectively.