中国农业科学 ›› 2026, Vol. 59 ›› Issue (8): 1622-1638.doi: 10.3864/j.issn.0578-1752.2026.08.003

• 作物遗传育种·种质资源·分子遗传学 • 上一篇    下一篇

基于表型性状的热带高粱种质资源遗传多样性分析与创新利用

葛玉彬1(), 贺春贵2,*(), 王宁3, 张国琴1, 张正英1, 吕鑫4   

  1. 1 甘肃省农业科学院作物研究所, 兰州 730070
    2 甘肃省农业科学院, 兰州 730070
    3 中国科学院植物研究所/饲草种质高效设计与利用全国重点实验室, 北京 100093
    4 山西农业大学高粱研究所/高粱遗传与种质创新山西省重点实验室, 山西晋中 030600
  • 收稿日期:2025-10-13 接受日期:2025-12-01 出版日期:2026-04-21 发布日期:2026-04-21
  • 通信作者:
    贺春贵,E-mail:
  • 联系方式: 葛玉彬,E-mail:gyb1996@126.com。
  • 基金资助:
    国家自然科学基金(32160498); 甘肃省重点研发计划(23YFNA0003); 甘肃省农业科技支撑计划(KJZC-2024-6); 甘肃省农业科学院生物育种专项(2023GAAS10); 甘肃省农业科学院协同创新专项(2024GAAS03); 甘肃省科技重大专项计划(25ZDNA002)

Genetic Diversity Analysis and Innovative Utilization of Introduced Tropical Sorghum Germplasm Resources Based on Phenotypic Traits

GE YuBin1(), HE ChunGui2,*(), WANG Ning3, ZHANG GuoQin1, ZHANG ZhengYing1, LÜ Xin4   

  1. 1 Crop Research Institute, Gansu Academy of Agricultural Sciences, Lanzhou 730070
    2 Gansu Academy of Agricultural Sciences, Lanzhou 730070
    3 Institute of Botany, Chinese Academy of Sciences/State Key Laboratory of Forage Breeding-by-Design and Utilization, Beijing 100093
    4 Sorghum Research Institute, Shanxi Agricultural University/Shanxi Key Laboratory of Sorghum Genetics and Germplasm Innovation, Jinzhong 030600, Shanxi
  • Received:2025-10-13 Accepted:2025-12-01 Published:2026-04-21 Online:2026-04-21

摘要:

【目的】为明确热带地区高粱种质资源的表型变异和遗传多样性,筛选优异种质,为我国北方温带地区高粱种质创新与优质高产新品种选育提供支撑。【方法】以70份热带高粱种质资源为试材,田间观测参试种质10个表型性状,综合运用Shannon-Weaver多样性指数、相关性分析、聚类分析、逐步回归分析、主成分分析等多元统计方法,对热带高粱种质在我国温带地区的遗传多样性进行分析和综合评价,分子标记辅助选择结合常规杂交开展目标性状设计育种,定向培育兼具bmrPS且能在北方温带地区安全制种生产的优质高产饲草高粱新品种。【结果】参试种质资源表型变异丰富,10个性状多样性指数为1.44—2.00;株高与茎粗、叶片数、叶长、叶宽和生物产量呈极显著正相关,生育时期与锤度呈极显著正相关,但与株高、茎粗、叶片数、叶长、生物产量呈极显著负相关;聚类分析将70份资源划分为3个类群,主成分分析将10个性状指标降维为5个独立的主成分,累计贡献率为85.921%;综合评价筛选出IS 18542等10份优异资源;逐步回归分析确定10个表型性状均可作为饲草高粱综合评价关键指标,分子定向设计育种挖掘3份优异资源,创制优良亲本系74A、1390R和107R,育成优质、高产青贮高粱新品种陇牧1号。【结论】基于表型性状的遗传多样性分析与综合评价,明确了热带高粱种质资源在温带地区广泛的表型变异和丰富的遗传多样性,确定了饲草高粱种质资源综合评价的10个关键指标;基因聚合育种实践发掘创制了兼具bmrPS的优良亲本,选育出优质高产饲草高粱新品种,实现了饲草品质和产量的协同提升。

关键词: 高粱, 热带种质, 表型性状, 遗传多样性, 基因聚合育种

Abstract:

【Objective】In order to analyze the genetic diversity of tropical sorghum germplasm resources, screen for superior sorghum germplasms, and to provide a critical support for the innovation of sorghum germplasm and the breeding of the new cultivar that with high-quality and high-yield in the temperate regions of northern China.【Method】Taking 70 tropical sorghum germplasm resources as test materials, and 10 phenotypic traits of the test germplasm resources were observed in the field. Multiple statistical methods such as Shannon-Weaver diversity index, correlation analysis, cluster analysis and principal component analysis, stepwise regression analysis were comprehensively applied for the analysis and comprehensively evalution the genetic diversity of tropical sorghum germplasm resources in the temperate region of China. Molecular marker-assisted selection combined with conventional hybridization was used to carry out target trait design breeding, and a new high-quality and high-yield forage sorghum variety with both bmr and PS genes and safe seed production in the northern temperate regions was bred.【Result】The phenotypic variations of the germplasm resources were abundant, and the diversity indices of the 10 traits ranged from 1.44 to 2.00. Correlation analysis showed that the plant height was extremely significantly positively correlated with stem diameter, number of leaves, leaf length, leaf width and biological yield. The growth stage was extremely significantly positively correlated with Brix, but extremely significantly negatively correlated with plant height, stem diameter, number of leaves, leaf length and biological yield respectively. Cluster analysis divided 70 resources into 3 groups with significant differences in phenotypic characteristics. Principal component analysis reduced 10 trait indicators to 5 independent principal components, with a cumulative contribution rate of 85.921%. 10 elite resources including IS 18542 were selected based on the comprehensive evaluation scores (F value). The stepwise regression analysis showed that all of the 10 phenotypic traits could be used as key indicators for the comprehensive evaluation of forage sorghum. 3 photoperiod sensitive resources of Ma5/Ma6 genotype were identified, excellent parents lines 74A, 1390R and 107R and the new silage sorghum variety Long mu No.1 that with high-quality and high-yield was bred by molecular design breeding.【Conclusion】Based on the genetic diversity analysis and comprehensive evaluation of phenotypic traits, the extensive phenotypic variations and rich genetic diversity of tropical sorghum germplasm resources in temperate regions were clarified, and the 10 key indicators for the comprehensive evaluation of forage sorghum germplasm resources were determined. The genes pyramiding breeding had discovered and created excellent parents with both bmr gene and PS genes, and the new forage sorghum variety with high-quality and high-yield was bred, indicated that the forage quality and yield were improved at the same time.

Key words: Sorghum bicolor (L.), tropical germplasm resources, phenotypic traits, genetic diversity, genes pyramiding breeding