作物学报2016，Vol.42Issue(1)：19-30,12.DOI:10.3724/SP.J.1006.2016.00019
谷子核心种质表型遗传多样性分析及综合评价
Phenotypic Diversity Evaluations of Foxtail Millet Core Collections
摘要
Abstract
Evaluation of genetic diversity could benefit the identification of optimal parental combinations for obtaining segregat-ing offspring with maximum genetic variability, and facilitate the introgression of favorable genes from various germplasm into commercial cultivars. In this study, foxtail millet core collections including 878 world-wide accessions were evaluated through phenotypic analysis of 15 agronomic traits. Main conclusions are as follows:(1) Chinese accessions present higher level of phe-notypic diversity, especially in grain weight per main stem, panicle length, panicle diameter, plant height, stem node number and growth period;phenotypic diversity is lower in elite cultivars than in traditional landraces;gains of breeding progress in foxtail millet are expressed in reduced plant height and panicle length, coupling with increased diameter of main stem, stem node number, panicle diameter, grain weight per main stem, panicle weight per main stem and growth period;(2) from the cluster analysis, for-eign resources are divided into three categories according to the geographical origins, the first category mainly includes accessions from northeast European countries, the second cluster is mainly collected from North America and Africa, and the third group includes varieties mainly from East Asia, South Asia, African, and European countries;Chinese collections is able to be divided into three groups of spring-sowing, summer-sowing and southern ecotypes; (3) comprehensive assessment of phenotypic traits based on principal component analysis (PCA) and step regression analysis demonstrates that leaf sheath color, bristle length, hull color, grain color, plant height, spike length, stem diameter and grain weight per plant can be used as main identification indica-tors of foxtail millet phenotypic variations. This research will benefit the utilization of foxtail millet resources in variety breeding practices in the future.关键词
谷子/核心种质/表型性状/综合评价Key words
Foxtail millet/Core collections/Phenotypic traits/Comprehensive evaluations引用本文复制引用
王海岗,王纶,乔治军,刁现民,贾冠清,智慧,温琪汾,董俊丽,陈凌,王君杰,曹晓宁,刘思辰..谷子核心种质表型遗传多样性分析及综合评价[J].作物学报,2016,42(1):19-30,12.基金项目
本研究由国家自然科学基金项目(31301328,31171560),国家科技支撑计划项目(2014BAD07B01),国家现代农业产业技术体系建设专项(CARS07-12.5-A02, CARS-07-12.5-A12)和中国农业科学院科技创新工程资助。This study was supported by the National Natural Science Foundation of China (31301328,31171560), the National Key Technology Re-search and Development Program (2014BAD07B01), the Special Program of Modern Agro-industry Technology System (CARS07-12.5-A02, CARS-07-12.5-A12) and the Agricultural Science and Technology Innovation Program of CAAS （31301328,31171560）
