热带玉米Suwan1群体导入不同类型温带种质的遗传分析
探讨将热带玉米Suwan1分别导入我国温带玉米5大类型测验种后形成新种质的产量及相关性状的杂种优势,为合理、有效地利用热带玉米种质提供理论依据。本试验采用不完全双列杂交法,分别将热带玉米Suwan1群体与我国温带玉米5大类群骨干自交系杂交,形成新的综合种,再与4个测验种杂交,组配36个杂交组合。通过2年1点的田间杂交组合8个表型(产量相关性状)评价,进行方差分析和配合力效应分析。方差分析表明,各杂交组合之间8个性状差异均达显著或极显著水平。同时,产量一般配合力效应值大小为CML171/Suwan1>Dan340/Suwan1>P159/Suwan1>18599/Suwan1>Chang7-2/Suwan1>Mu6/Suwan1>zheng58/ Suwan1>91-95/Suwan1>Mo17/Suwan1。根据联合产量分析,在36个组合中18599×Dan340/Suwan1和Dan340×CML171/Suwan1的杂种优势表现较强。由此,本研究表现较好的杂种优势组型是PB、TSPT×LDHG/Suwan1(Reid/Suwan1)、Reid×TSPT/Suwan1、Reid×Lancaster/Suwan1,将Suwan1导入我国5大类群所形成的新种质对玉米的产量和其他性状的改良可以取得显著成效。
英文摘要:
In order to explore the heterosis of yield related traits, in this paper, different types of descendants derived from temperate germplasm crossed with Suwan1 improved from tropical maize. Based on the method of incomplete diallel cross, 36 hybrids were constructed by crossed suwan1 with 5 testers from temperate regions. Based on this, a total of 8 phenotypes traits (yield and main traits relating) were investigated at two locations in two years. The analysis of variance, the combining ability effect were calculated by using DPS software. Results showed that, each of
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