caa a22 4500 445322713 CHVBK 20180317142709.0 cr unu---uuuuu 170323e20111201xx s 000 0 eng 10.1007/s10681-011-0517-8 doi (NATIONALLICENCE)springer-10.1007/s10681-011-0517-8 Identification of genetic factors affecting plant density response through QTL mapping of yield component traits in maize ( Zea mays L.) [Elektronische Daten] [Jinjie Guo, Zongliang Chen, Zhipeng Liu, Baobao Wang, Weibin Song, Wei Li, Jing Chen, Jingrui Dai, Jinsheng Lai] It is generally believed that grain yield per unit area of modern maize hybrids is related to their adaptability to high plant population density. In this study, the effects of two different plant densities (52,500 and 90,000 plants/hm2) on 12 traits associated with yield were evaluated using a set of 231 F2:3 families derived from two elite inbred lines, Zheng58 and Chang7-2. Evaluation of the phenotypes expressed under the two plant density conditions showed that high plant density condition could decrease the value of 10 measured yield component traits, while the final grain yield per hectare and the rate of kernel production were increased. Twenty-seven quantitative trait loci (QTLs) for 10 traits were detected in both high and low plant density conditions; among them, some QTLs were shown to locate in five clusters. Thirty QTLs were only detected under high plant density. These results suggest that some of the yield component traits perhaps were controlled by a common set of genes, and that kernel number per row, ear length, row number per ear, cob diameter, cob weight, and ear diameter may be influenced by additional genetic mechanisms when grown under high plant density. The QTLs identified in this study provide useful information for marker-assisted selection of varieties targeting increased plant density. Springer Science+Business Media B.V., 2011 Maize ( Zea mays L.) nationallicence Yield components nationallicence Plant density stress nationallicence Quantitative trait loci nationallicence Epistasis nationallicence QTL : Quantitative trait loci nationallicence SSR : Simple sequence repeats nationallicence EW : Ear weight nationallicence GW : Grain weight per ear nationallicence 100KW : 100-kernel weight nationallicence EL : Ear length nationallicence ED : Ear diameter nationallicence RN : Row number per ear nationallicence KNR : Kernel number per row nationallicence 10KT : 10-kernel thickness nationallicence CD : Cob diameter nationallicence CW : Cob weight nationallicence RKP : Rate of kernel production nationallicence GYH : Grain yield per hectare nationallicence LOD : Logarithm of odds nationallicence LPD : Low plant density nationallicence HPD : High plant density nationallicence Guo Jinjie State Key Laboratory of Agrobiotechnology and National Maize Improvement Center, China Agricultural University, 2 Yuan-ming-yuan West Road, 100193, Beijing, China aut Chen Zongliang State Key Laboratory of Agrobiotechnology and National Maize Improvement Center, China Agricultural University, 2 Yuan-ming-yuan West Road, 100193, Beijing, China aut Liu Zhipeng State Key Laboratory of Agrobiotechnology and National Maize Improvement Center, China Agricultural University, 2 Yuan-ming-yuan West Road, 100193, Beijing, China aut Wang Baobao State Key Laboratory of Agrobiotechnology and National Maize Improvement Center, China Agricultural University, 2 Yuan-ming-yuan West Road, 100193, Beijing, China aut Song Weibin State Key Laboratory of Agrobiotechnology and National Maize Improvement Center, China Agricultural University, 2 Yuan-ming-yuan West Road, 100193, Beijing, China aut Li Wei State Key Laboratory of Agrobiotechnology and National Maize Improvement Center, China Agricultural University, 2 Yuan-ming-yuan West Road, 100193, Beijing, China aut Chen Jing State Key Laboratory of Agrobiotechnology and National Maize Improvement Center, China Agricultural University, 2 Yuan-ming-yuan West Road, 100193, Beijing, China aut Dai Jingrui State Key Laboratory of Agrobiotechnology and National Maize Improvement Center, China Agricultural University, 2 Yuan-ming-yuan West Road, 100193, Beijing, China aut Lai Jinsheng State Key Laboratory of Agrobiotechnology and National Maize Improvement Center, China Agricultural University, 2 Yuan-ming-yuan West Road, 100193, Beijing, China aut Euphytica Springer Netherlands 182/3(2011-12-01), 409-422 0014-2336 182:3<409 2011 182 10681 https://doi.org/10.1007/s10681-011-0517-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10681-011-0517-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Guo Jinjie State Key Laboratory of Agrobiotechnology and National Maize Improvement Center, China Agricultural University, 2 Yuan-ming-yuan West Road, 100193, Beijing, China aut NATIONALLICENCE 700 1- Chen Zongliang State Key Laboratory of Agrobiotechnology and National Maize Improvement Center, China Agricultural University, 2 Yuan-ming-yuan West Road, 100193, Beijing, China aut NATIONALLICENCE 700 1- Liu Zhipeng State Key Laboratory of Agrobiotechnology and National Maize Improvement Center, China Agricultural University, 2 Yuan-ming-yuan West Road, 100193, Beijing, China aut NATIONALLICENCE 700 1- Wang Baobao State Key Laboratory of Agrobiotechnology and National Maize Improvement Center, China Agricultural University, 2 Yuan-ming-yuan West Road, 100193, Beijing, China aut NATIONALLICENCE 700 1- Song Weibin State Key Laboratory of Agrobiotechnology and National Maize Improvement Center, China Agricultural University, 2 Yuan-ming-yuan West Road, 100193, Beijing, China aut NATIONALLICENCE 700 1- Li Wei State Key Laboratory of Agrobiotechnology and National Maize Improvement Center, China Agricultural University, 2 Yuan-ming-yuan West Road, 100193, Beijing, China aut NATIONALLICENCE 700 1- Chen Jing State Key Laboratory of Agrobiotechnology and National Maize Improvement Center, China Agricultural University, 2 Yuan-ming-yuan West Road, 100193, Beijing, China aut NATIONALLICENCE 700 1- Dai Jingrui State Key Laboratory of Agrobiotechnology and National Maize Improvement Center, China Agricultural University, 2 Yuan-ming-yuan West Road, 100193, Beijing, China aut NATIONALLICENCE 700 1- Lai Jinsheng State Key Laboratory of Agrobiotechnology and National Maize Improvement Center, China Agricultural University, 2 Yuan-ming-yuan West Road, 100193, Beijing, China aut NATIONALLICENCE 773 0- Euphytica Springer Netherlands 182/3(2011-12-01), 409-422 0014-2336 182:3<409 2011 182 10681 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer