Analysis of yield attributes and crop physiological traits of Liangyoupeijiu, a hybrid rice recently bred in China
Analysis of yield attributes and crop physiological traits of Liangyoupeijiu, a hybrid rice recently bred in China
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DOI：
10.1016/j.fcr.2007.06.001
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发表时间：
2007-09-13
影响因子：
5.8
通讯作者：
Shiraiwa, Tatsuhiko
中科院分区：
文献类型：
--
作者：
Katsura, Keisuke;Maeda, Shuhei;Shiraiwa, Tatsuhiko
2003年和2004年在日本京都对我国新育成的超级杂交稻两优培九与日本晴、高成的生理特性进行了比较。两优培九在这两年的产量都显著高于日本晴，2004年的产量为11.8 t ha（-1），是京都环境条件下的最高产量。两优培九抽穗前生育期和叶面积持续期较长，生物量积累量较大。两优培九籽粒多，灌浆期营养器官向穗部转运大量碳水化合物。测定的三个产量构成因素是抽穗时的穗重（PO）、灌浆期间从叶和茎转运到穗的碳水化合物的量（Δ T）和灌浆期间新同化的碳水化合物（Δ W）。结果表明，当所有数据（n = 8）合并时，P-o和Δ T之和与籽粒产量呈极显著正相关（r = 0.876**）。但两优培九和日本晴在整个生育期的辐射利用效率（芸香）在两年内差异不显著。尽管生育期较短，但籼/粳杂交品种高成在两年中的产量与两优培九相似。整个生长期的平均芸香高成在2003年和2004年分别为1.60和1.64 g MJ（-1），显著高于两优培九在2003年和2004年分别为1.46和1.52 g MJ（-1）。两优培九的高产主要是由于其较高的芸香和较大的Po和AT。研究结果表明，两优培九的高产主要是由于其抽穗前生物量积累较多，而生物量积累的主要原因是其较大的LAD，而不是芸香。(c)2007 Elsevier B. V.保留所有权利。
Crop physiological traits of Liangyoupeijiu, a "super" hybrid rice variety recently bred in China, were compared with those of Takanari and Nipponbare in 2003 and 2004 in Kyoto, Japan. Liangyoupeijiu showed a significantly higher grain yield than Nipponbare in both years, and achieved a grain yield of 11.8 t ha(-1) in 2004, which is the highest yield observed under environmental conditions in Kyoto. Liangyoupeijiu had longer growth duration and larger leaf area duration (LAD) before heading, causing larger biomass accumulation before heading than the other two varieties. Liangyoupeijiu had a large number of grains and translocated a large amount of carbohydrates from the vegetative organ to the panicle during the grain filling period. The three yield components measured were panicle weight at heading (PO), the amount of carbohydrates translocated from the leaf and stem to the panicle during the grain filling period (Delta T), and the newly assimilated carbohydrates during grain filling (Delta W). It was found that the sum of P-o and Delta T were strongly correlated with grain yield when all the data (n = 8) were combined (r = 0.876**). However, there was no significant difference in the radiation use efficiency (RUE) of the whole growth period between Liangyoupeijiu and Nipponbare for both years. Even though the growth duration was shorter, Takanari, an indica/japonica cross-bred variety, showed a similar yield to Liangyoupeijiu in both years. The mean RUE of the whole growth period was significantly higher in Takanari, 1.60 and 1.64 g MJ(-1) in 2003 and 2004, respectively, than in Liangyoupeijiu, which had a RUE of 1.46 and 1.52 g MJ(-1) in 2003 and 2004, respectively. The high grain yield of Takanari was mainly due to its high RUE compared with Liangyoupeijiu and its large Po and AT Our result showed that the high grain yield of Liangyoupeijiu was due to its large biomass accumulation before heading, which resulted from its large LAD rather than its RUE. (c) 2007 Elsevier B.V. All rights reserved.