Studies on the Varietal Difference of Harvest Index in Rice : Relationship between harvest index and dry matter production
Studies on the Varietal Difference of Harvest Index in Rice : Relationship between harvest index and dry matter production
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水稻收获指数品种差异的研究：收获指数与干物质产量之间的关系
DOI：
10.1626/jcs.69.351
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发表时间：
2000
影响因子：
--
通讯作者：
K. Asanuma
中科院分区：
文献类型：
--
作者：
Jing Cui;A. Kusutani;M. Toyota;K. Asanuma
以60个日本品种（J组）和20个亚洲国家育成的高产品种（H组）为材料，研究了收获指数（HI）和产量（Y）的品种间差异。HI为36.8%~ 53.4%。J组和H组的HI平均值分别为43.5%和48.8%。Y含量在22.6 ~ 40.0g/株之间。J组Y平均值为27.8g/株，H组为34.1g/株。H组HI与Y呈显著正相关，J组HI与Y无显著相关性。J组的HI与成熟期总干重呈显著负相关，H组的HI与成熟期总干重相关不显著。HI和干物质生产之间的关系进行了研究，通过划分HI为以下三个组成部分，基于小穗数（N）和总干重在抽穗期（W1），和W2。HI=Y/W2=[W1/W2]×[N/W1]×[Y/N]两组HI与W1/W2呈负相关。J组HI与N/W1呈正相关，H组HI与Y/N呈正相关。W1/W2、N/W1和Y/N分别可作为抽穗前后干物质生产平衡、小穗生产效率和结实能力的指标。这些结果表明，抽穗后干物质生产力相对较高的品种具有较高的水稻HI。此外，HI被认为是由小穗生产的效率在J组和H组的成熟能力。
Varietal differences harvest index (HI) and yield (Y) were examined using 60 Japanese varieties (J group) and 20 high-yielding varieties bred in Asian countries (H group). HI varied from 36.8% to 53.4%. Mean values of HI were 43.5% in the J group and 48.8% in the H group. Y ranged form 22.6g/plant to 40.0g/plant. The mean value of Y in the J group was 27.8g/plant, and that in the H grouo was 34.1g/plant. A significant positive correlation was found between HI and Y in the H group, but the correlation was not significant in the J group. There was a significant negative correlation between HI and total dry weight at the maturing time (W2) in the J group, but the correlation was not significant in the H group. The relationship between HI and dry matter production was examined by dividing HI into the following three components, based on the number of spikelets (N) and total dry weight at the heading time (W1), and W2. HI=Y/W2=[W1/W2]×[N/W1]×[Y/N] HI showed a negative correlation with W1/W2 in both groups. HI also had a positive correlation with N/W1 in the J group and with Y/N in the H group. W1/W2, N/W1 and Y/N are presumed to be indicators of the balance of dry matter production around heading time, the efficiency of spikelet production and the ripening ability, respectively. Therefore, these results suggest that varieties with relatively higher dry matter productivity after heading have higher HI in rice. Furthermore, HI was assumed to be affected by the efficiency of spikelet production in the J group and by the ripening ability in the H group.