Analysis of yield-attributing traits for high-yielding wheat lines in southwestern Japan
| Autor: | Masaya Fujita, Zenta Nishio, Kazuhiro Nakamura, Midori Okami, Hitoshi Matsunaka |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
pre-anthesis growth leaf area index grain yield Field experiment Growing season 04 agricultural and veterinary sciences lcsh:Plant culture Biology 01 natural sciences High yielding Crop growth rate Agronomy wheat Yield (wine) Correlation analysis 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Grain yield lcsh:SB1-1110 Cultivar Leaf area index grain number Agronomy and Crop Science 010606 plant biology & botany |
| Zdroj: | Plant Production Science, Vol 19, Iss 3, Pp 360-369 (2016) |
| ISSN: | 1349-1008 1343-943X |
| Popis: | Development of wheat cultivars that achieve high yields despite the short growing season is essential for increasing wheat production in southwestern Japan. The objectives of this study were to assess the genetic progress in grain yield and to clarify yield-attributing traits of high-yielding wheat lines in southwestern Japan. We conducted field experiments for two growing seasons (2012–2013 and 2013–2014) using three commercial wheat cultivars (Shiroganekomugi, Chikugoizumi, and Iwainodaichi) and four high-yielding wheat lines including Hakei W1380 developed in southwestern Japan. In an ancillary field experiment, we compared a commercial cultivar, Shiroganekomugi, and a high-yielding line, Hakei W1380, in the 2014–2015 season. Across the two seasons, grain yield of high-yielding lines was generally higher than commercial cultivars. Hakei W1380 achieved the highest grain yield across the two seasons, and successfully produced more than 900 g m−2 in the 2013–2014 season. Correlation analysis showed that recent yield progress of wheat lines in southwestern Japan was derived from enhanced biomass production and grain number m−2. Larger numbers of grains m−2 in high-yielding lines than in commercial cultivars were associated with higher crop growth rate at the pre-anthesis stage, and therefore higher spike dry weight m−2 at anthesis. Genotypic differences in crop growth rate from jointing to anthesis resulted mainly from differences in leaf area index. These results indicate that further improvements in grain yield in southwestern Japan could be achieved by increasing the amount of radiation intercepted at the pre-anthesis stage and grain number m−2. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|