作物杂志,2018, 第5期: 33–39 doi: 10.16035/j.issn.1001-7283.2018.05.006

• 遗传育种·种质资源·生物技术 • 上一篇    下一篇

不同玉米自交系子粒脱水速率及其与主要影响性状的相关分析

陈广周,王广福,渠建洲,司雷勇,金岩,徐淑兔,薛吉全,路海东   

  1. 西北农林科技大学农学院/农业农村部西北旱区玉米生物学与遗传育种重点实验室,712100,陕西杨凌
  • 收稿日期:2018-03-23 修回日期:2018-06-27 出版日期:2018-10-15 发布日期:2018-10-12
  • 通讯作者: 薛吉全,路海东
  • 作者简介:陈广周,在读硕士,研究方向为玉米高产高效栽培
  • 基金资助:
    国家自然科学基金(31771724);陕西省科技重点研发计划项目(2018NY-031);陕西省科技重点研发计划项目(2017ZDCXL-NY-02-04)

Study on Grain Dehydration Rate and Correlation Analysis of Major Related Characters in Different Maize Inbred Lines

Chen Guangzhou,Wang Guangfu,Qu Jianzhou,Si Leiyong,Jin Yan,Xu Shutu,Xue Jiquan,Lu Haidong   

  1. College of Agronomy, Northwest A & F University/Key Laboratory of Biology and Genetic Improvement of Maize in Arid Area of Northwest Region, Ministry of Agriculture and Rural Affairs, Yangling 712100, Shaanxi, China
  • Received:2018-03-23 Revised:2018-06-27 Online:2018-10-15 Published:2018-10-12
  • Contact: Jiquan Xue,Haidong Lu

摘要:

为了明确不同群体玉米自交系子粒脱水特征差异和影响玉米脱水速率的主要性状与子粒脱水间的关系,以陕A群、陕B群选育的8份玉米自交系和2份骨干自交系(昌7-2和PH4CV)为试验材料,分析了不同玉米自交系的子粒脱水速率、收获期子粒含水率、子粒灌浆速率、苞叶性状、果穗性状、叶面积、叶绿素含量、株高、穗位高及产量构成等变化特征及其与子粒脱水间的相互关系。结果表明:不同玉米自交系子粒脱水速率呈现“快–慢–较快–慢–较快–慢”的变化趋势。子粒脱水速率与收获期子粒含水率、苞叶平均含水率、苞叶层数、苞叶长度、穗粗、粒长、粒宽、叶面积、SPAD值、子粒灌浆天数等性状呈显著负相关关系,与苞叶脱水速率存在显著正相关关系,与株高、穗位高和子粒产量间相关性不显著。不同自交系间的子粒脱水速率、收获期子粒含水率、苞叶含水率、苞叶脱水速率等指标差异明显,KB043、KA105和KB024自交系的子粒脱水速率快、产量较高,可在宜机收品种选育时作为快速脱水材料加以考虑。

关键词: 玉米, 自交系, 脱水速率, 相关分析

Abstract:

This study was set up to explore the characteristics and difference of grain dehydration rate of different groups (Shaan A group and Shaan B group) of maize inbred lines, to analyse major related factors characters affecting grain dehydration rate of maize. Eight maize inbred lines from the Shaan A and Shaan B groups and 2 elite inbred lines (‘chang7-2’, ‘PH4CV’) were used as the test materials. The change characteristics of grain dehydration rate, grain water content in harvest period, grain filling rate, husk characters, ear characters, leaf area, chlorophyll content, plant height, ear height and yield components in different maize inbred lines were analyzed. The relationships between all traits and grain dehydration rate were studied. The results showed that the changes of different maize inbred lines in grain dehydration rate were “fast-slow-faster-slow-faster-slow”. There was a significant negative correlation between the grain dehydration rate and grain moisture content at harvest, the moisture content of bracts, the number of bract layers, the length of bract, the ear diameter, the grain length, the grain width, the leaf area, the SPAD value and the days of grain filling. There was a significant positive correlation between the dehydration rate of grain and the dehydration rate of bract. The correlations between the grain dehydration rate with the plant height, ear height, yield and the other traits was not significant. There were significant differences in grain dehydration rate, grain moisture content at harvest, husk moisture content, husk dehydration rate and other various related indexes among different maize inbred lines. KB043, KA105 and KB024 can be considered as breeding materials for machnical harvesting due to their high grain dehydration rates and higher yields.

Key words: Maize, Inbred line, Dehydration rate, Correlation analysis

图1

不同玉米自交系子粒脱水速率小写字母不同表示差异达显著水平。下同"

图2

不同玉米自交系子粒含水率"

表1

不同玉米自交系间单株叶面积、SPAD值、株高和穗位高比较"

指标Index KB043 KB593 KB024 KA105 KA106 KA109 KB102 昌7-2 Chang7-2 PH4CV 91227 F
单株叶面积Leaf area per plant (cm2) 2 752b 3 746ab 3 498ab 4 096ab 4 740a 3 835ab 3 815ab 4 023ab 3 621b 4 043ab 3.99*
SPAD值SPAD value 49.2ab 51.1ab 46.4b 50.6ab 52.9ab 47.9ab 58.7a 51.2ab 44.0b 53.7ab 3.93*
株高Plant height (cm) 175.6de 185.8d 174.6de 222.8b 242.6a 227.0b 160.0e 163.3e 206.4c 206.9c 61.19**
穗位高Ear height (cm) 67.9abc 66.5abc 56.9cd