中国农业科学 ›› 2024, Vol. 57 ›› Issue (15): 2931-2945.doi: 10.3864/j.issn.0578-1752.2024.15.003

• 作物遗传育种·种质资源·分子遗传学 • 上一篇    下一篇

23份老挝糯玉米早代系品质性状配合力分析及育种潜力评估

朱春桃1(), 任丹丹1, 柳政岑1, 刘长闯1, 刘瑞琪1, 郑洪建2, 胡尔良1,3, 林海建1,3, 李静威1,3, 卢艳丽1, 汪青军1,3()   

  1. 1 四川农业大学玉米研究所,成都 611130
    2 上海市农业科学院作物育种栽培研究所,上海 201403
    3 四川天府新区乡村振兴研究院,成都 610096
  • 收稿日期:2024-01-04 接受日期:2024-02-29 出版日期:2024-08-05 发布日期:2024-08-05
  • 通信作者:
    汪青军,E-mail:
  • 联系方式: 朱春桃,E-mail:taochunzhu53@qq.com
  • 基金资助:
    成都市重大科技应用示范项目(2022-YF09-00054-SN); 四川省科技计划(2021JDRC0124); 四川省科技计划(2021YFN0034); 四川省科技计划(2024NSFSC1206)

Combining Ability Analysis on Quality Traits and Breeding Potential Evaluation of 23 Waxy Maize Lines from Laos

ZHU ChunTao1(), REN DanDan1, LIU ZhengCen1, LIU ChangChuang1, LIU RuiQi1, ZHENG HongJian2, HU ErLiang1,3, LIN HaiJian1,3, LI JingWei1,3, LU YanLi1, WANG QingJun1,3()   

  1. 1 Maize Research Institute, Sichuan Agricultural University, Chengdu 611130
    2 Crop Breeding & Cultivation Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai 201403
    3 Rural Revitalization Research Institute of Sichuan Tianfu New Area, Chengdu 610096
  • Received:2024-01-04 Accepted:2024-02-29 Published:2024-08-05 Online:2024-08-05

摘要:

目的】优异品质是鲜食糯玉米育种的首要目标性状,筛选品质性状一般配合力高的早代系和优异糯玉米组合,明确老挝糯玉米材料的育种潜力,为优质鲜食糯玉米新品种的培育奠定基础。【方法】利用Maize6H-60K芯片,获得33份糯玉米材料的高质量基因型数据用于聚类分析。结合碘染试验和糯质基因分子检测,明确老挝糯玉米早代系糯质基因的类型。通过不完全双列杂交试验,对组配的439个组合的品质等性状进行表型鉴定和配合力分析,明确老挝糯玉米早代系的育种潜力。对筛选出的优势组合开展品质性状多人品鉴试验,鉴定出最有潜力的优质糯玉米组合。【结果】利用56 626个高质量SNP进行聚类分析,结果表明,老挝材料与国内材料属于不同的分支,可以被区分开来。供试的23份老挝早代系均为糯质玉米,且其中16份属于wx-D10型,3份属于wx-D7型,另外4份为未知类型。老挝糯玉米材料品质性状的遗传力均较低,介于0.14-0.35,宜在高世代进行选择。组配的439个不完全双列杂交组合蒸煮品质的均值极显著高于对照京科糯2000和石糯2号,与渝糯7号没有显著差异。老挝糯玉米早代系F02、F22、F25和F28的所有品质性状一般配合力效应值均为正值,可用于国内糯玉米品质性状的改良。优异组合M02×F02和M22×F22在多人品鉴试验中,约86%的人评价为等级优。【结论】老挝糯玉米地方种遗传变异丰富,与国内糯玉米自交系有一定的遗传距离,可能存在新的糯质基因等位变异,在糯性和果皮厚度等品质性状上有明显的优势,可用于国内糯玉米材料品质性状的改良。

关键词: 糯玉米, 品质, 种质资源, 配合力, 糯质基因

Abstract:

Objective】High-quality is the primary target for waxy maize breeding. The aim of this study is to screen lines with high general combining ability and excellent hybrids with high-quality traits, which will clarify the breeding potential of these lines from Laos and lay a foundation in breeding high-quality waxy maize varieties.【Method】Using the Maize6H-60K chip, high quality genotype data of 33 waxy maize materials were obtained for cluster analysis. Combined with the iodine staining experiment and molecular detection of waxy genes, these types of waxy genes from early-generation maize lines from Laos were identified. Through the incomplete diallel cross experiment, phenotype identification and combining ability analysis of quality and other traits of 439 combinations were carried out to clarify the breeding potential of waxy maize lines with early generation from Laos. An experiment of quality traits evaluation with multi-person was conducted on these selected combinations with advantages to identify the most promising high-quality waxy maize hybrids. 【Result】Clustering analysis was conducted based on 56 626 high quality SNP, and the results showed that these lines from Laos and domestic materials belong to different branches and can be clearly distinguished. All 23 lines with early generation from Laos were waxy maize, among which 16 lines belonged to the wx-D10 type, three lines belonged to the wx-D7 type, and the other four lines were unknown types. The heritability of quality traits of waxy maize materials from Laos is low, ranging from 0.14 to 0.35, which is suitable for selection in higher generations. The average stewing quality of 439 combinations was significantly higher than that of the control Jingkenuo2000 and Shinuo2, but there was no significant difference from Yunuo7. The general combining ability effects of all quality traits of waxy maize lines F02, F22, F25, and F28 were positive, which could be used to improve quality traits of domestic waxy maize in China. Furthermore, these combinations M02×F02 and M22×F22 were evaluated as excellent in multi-person quality traits evaluation experiments by approximately 86% of all tasters.【Conclusion】These local varieties of waxy maize from Laos have rich genetic variation, with a certain genetic distance from domestic waxy maize inbred lines. There may also exist new alleles of waxy gene in these lines from Laos. In addition, these waxy maize lines from Laos have obvious advantages in quality traits, including waxy quality, pericarp thickness and other traits, which can be used as valuable germplasm for improving the quality traits of domestic waxy maize in China.

Key words: waxy corn, quality, germplasm resources, combining ability, waxy gene