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9个甜糯双隐基因型玉米自交系配合力效应分析

2016-07-10刘亚利杨耀迥苏琪陈坤卢生乔滕辉升张述宽

安徽农业科学 2016年5期

刘亚利 杨耀迥 苏琪 陈坤 卢生乔 滕辉升 张述宽

摘要[目的]对9个甜糯双隐性基因型玉米自交系进行配合力测定和分析,为甜糯双隐性基因型玉米自交系的利用和强优势组合的选配提供一定的理论依据。[方法]以3个糯玉米自交系为测验种,9个甜糯双隐基因型玉米自交系为被测验种,按NCⅡ遗传交配设计配制27个测交组合,通过配合力测定,筛选优良甜糯双隐基因型玉米自交系,用于选育甜糯玉米杂交种。[结果]9个自交系的产量配合力差异显著,M104、M105、M98、M100和F114的一般配合力较高;组合A25(291.77)、A14(263.07)、A07(182.54)、A15(163.19)、A11(150.15)、A13(148.13)、A18(131.65)、A09(82.15)、A27(75.60)、A05(48.68)的配合力总效应较高,为较强优势组合。[结论]自交系M104、M105、M98、M100和F114具有较高的利用价值,用其作亲本较容易组配出高产组合。

关键词 NCⅡ遗传交配设计;甜糯玉米;自交系;配合力

中图分类号 S513 文献标识码 A 文章编号 0517-6611(2016)05-024-03

Abstract[Objective]To detect and analyze the combining abilities of nine sweetwaxy recessive maize inbred lines, and to provide certain theoretical basis for the utilization of maize inbred lines with sweetwaxy recessive genes and the apolegamy of strong superiority crosses.[Method]With three waxy maize inbred lines as the detecting species and nine sweetwaxy recessive inbred lines as the detected species, 27 combinations were prepared according to NCⅡgenetic mating design. Through combining ability detection, sweetwaxy recessive maize inbred lines were screened for the breeding of sweetwaxy maize inbred lines.[Result]The yield combination ability of nine hybrid lines had significant differences. M104, M105, M98, M100 and F114 had general combining ability; combinations A25(291.77), A14(263.067), A07(182.54), A15(163.19), A11(150.15), A13(148.13), A18(131.65), A09(82.15), A27(75.60) and A05(48.68) had relatively high total combining abilities, which belonged strong advantage combinations.[Conclusion]Inbred lines M104, M105, M98, M100 and F114 have relatively high use values, and they can be used to prepare highyield combination.

Key words NCⅡ design; Sweetwaxy maize; Inbred line; Combination ability

随着生活水平的不断提高,人们对鲜食玉米的需求量越来越大。当前我国鲜食甜、糯玉米仍存在品种档次低、产品类型单一、产量低、口感差等问题,不能满足人们日益增长的口味需求[1-2]。为此,需从育种基础研究抓起,重视种质资源的挖掘、整理和创新利用。选育具有甜糯双隐性基因的加甜型糯玉米品种,已成为近年鲜食玉米选育的一个新方向。wxwxsh2sh2基因型玉米就是一种人工创造玉米类型,用其与糯玉米(wxwxSh2Sh2)杂交,种子表现型为糯质,但在种植后出现分离,F2出现表现型1/4的甜质子粒,因此鲜食具有特殊的风味,深受消费者的欢迎。

玉米自交系是杂交种选育的遗传基础,一般来说评价一个自交系的好坏除了看其产量、抗逆性和品质表现外,更重要的在于其配合力的高低。……

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