豫综5号玉米综合种淀粉含量轮回选择效果分析

doi:10.3864/j.issn.0578-1752.2012.08.020

摘要/Abstract

摘要： 【目的】评价豫综5号玉米群体淀粉含量的改良效果，为创制高淀粉玉米种质资源、选育高淀粉玉米杂交种和继续改良豫综5号的淀粉含量提供依据。【方法】以提高玉米群体淀粉含量为目标，利用近红外技术对豫综5号群体完成了4轮的群体改良。以改良群体为父本，以黄早4、丹340、齐319、掖478和Mo17为测验种，采用NC-II遗传交配设计组配成20个测交组合。通过对不同轮次改良群体和20个测交组合在2个环境中的评价试验，对豫综5号群体淀粉含量轮回选择的改良效果进行了比较研究。【结果】豫综5号群体的淀粉含量随着改良轮次的增加呈逐渐提高的趋势，由C0的69.39%增加到C4的72.31%，4轮选择后淀粉含量实际增益为2.92%。同时蛋白质和赖氨酸含量呈逐轮下降趋势。随着改良轮次的增加，各测验种与各轮改良群体测交组合的淀粉含量逐轮提高，说明非破坏性单粒淀粉含量的轮回选择对豫综5号淀粉含量的改良是有效的；就一般配合力而言，随着改良轮次的增加，淀粉含量的一般配合力呈逐轮提高的趋势；从特殊配合力分析结果表明，黄早4与各轮群体间特殊配合力效应值逐轮提高，其它4个测验种与群体特殊配合力效应值呈现一定的波动。【结论】利用非破坏性单粒淀粉含量的轮回选择改良豫综5号淀粉含量是有效的，随着改良轮次的增加，豫综5号的淀粉含量逐渐提高。

关键词: 玉米, 群体改良, 单粒淀粉含量的轮回选择

Abstract: 【Objective】 The objective of the study is to evaluate the improvement efficiency in maize population Yu Syn5 so as to provide reference for creating high-starch content germplasm resources, breeding high-starch content hybrids and keeping on improving starch content of Yu Syn5. 【Method】 The improvement for starch content in maize population Yu Syn5 was made for 4 cycles using near infrared analytical technology. Twenty testcrossing combinations made by Huangzao 4, Dan 340, Qi 319, Ye 478 and Mo17 and crossed for four cycles to improve the populations according to NC II design were evaluated for the starch content and the combining ability in two environments. 【Result】 The starch content of Yu Syn5 gradually increased from 69.39% of C0 to 72.31% of C4 with increase of improvement cycles, which the actual gain of 2.92% was obtained after four cycles improvement. But the protein content and lysine content decreased with increase of improvement cycles. The starch content of testcrossing combinations also increased with increase of improvement cycles. The results showed that the recurrent selection of nondestructive starch content of single grain could effectively improve the starch content of Yu Syn5. Regarding the general combining ability (GCA), the value of starch content GCA was improved in each cycle for the populations. The values of special combining ability (SCA) between Huangzao4 and the improved populations were increased per cycle, while the values of SCA between other 4 testers and the populations appeared fluctuation. 【Conclusion】 It was efficient to improve the starch content of Yu Syn5 by the recurrent selection of nondestructive starch content of single grain. The starch content of populations gradually increased with increase of improvement cycles.

Key words: maize, improvement of population, recurrent selection of single grain starch content

库丽霞, 王付娟, 郭书磊, 谢丽莉, 刘海静, 张君, 田磊, 陈彦惠. 豫综5号玉米综合种淀粉含量轮回选择效果分析[J]. 中国农业科学, 2012, 45(8): 1636-1643.

KU Li-Xia, WANG Fu-Juan, GUO Shu-Lei, XIE Li-Li, LIU Hai-Jing, ZHANG Jun, TIAN Lei, CHEN Yan-Hui. Improvement Efficiency of Recurrent Selection for Starch Content in Maize Population Yu Syn5[J]. Scientia Agricultura Sinica, 2012, 45(8): 1636-1643.

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https://www.chinaagrisci.com/CN/Y2012/V45/I8/1636

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