|
|||||
|
|
Identification of QTLs for salt tolerance at germination and seedling stage of Sorghum bicolor L. Moench |
|
| Authors: | Hailian Wang Guiling Chen Huawen Zhang Bin Liu Yanbing Yang Ling Qin Erying Chen Yanan Guan |
| Institution: | 1. Department of Crop Science, North Carolina State University, Raleigh, NC, 27695, USA 2. North Carolina Foundation Seed Producers Inc., 8220 Riley Hill Road, Zebulon, NC, 27597, USA 3. Northeast Research and Extension Center, University of Arkansas, P.O. Box 48, Keiser, AR, 72351, USA 4. Coastal Plain Soil, Water and Plant Conservation Research, USDA-ARS, 2611 W. Lucas St., Florence, SC, 29501-1242, USA 5. Monsanto Company, Hartsville, SC, 29550, USA 6. Department of Plant and Soil Sciences, Mississippi State University, Starkville, MS, 39762, USA |
| Abstract: | Upland cotton (Gossypium hirsutum L.) hybrids display commercially useful levels of heterosis for lint yield. Cotton lint yield is primarily a multiplicative product of boll number and lint per boll, both of which can be further dissected into sub-components. Relationships among the yield components are complex where they further interact with the environment. To identify different yield components of hybrid cotton lint yield and their relationship with environment, three cotton varieties, DP51, STV474 and LA887 and, their respective hybrids were evaluated for lint yield components across five environments. Heterosis was observed for lint yield as well as yield components. The relationship between heterosis and mean environmental yield was negative for two hybrid combinations, whereas one hybrid showed increased heterosis from low to high yielding environments. Boll number was the major yield component contributing to lint yield. However, yield components contributing to the change in heterosis from low to high yielding environments were different for the three hybrids. The change in lint yield heterosis across environments was correlated with lint per boll and lint per seed for DP51 × STV474 and LA887 × DP51. Whereas, bolls number and boll retention were the main yield components contributing to higher lint yield heterosis of STV474 × LA887 in low yielding environments. Results also reveal effects of parental entries on lint yield as well as relationship of heterosis and environment. |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ | |