Characteristics of Growth and Yield Formation in the Improved Genotype of Supernodulating Soybean (Glycine maxL. Merr.)
Characteristics of Growth and Yield Formation in the Improved Genotype of Supernodulating Soybean (Glycine maxL. Merr.)
复制标题
改良基因型超级结瘤大豆（Glycine maxL. Merr.）的生长及产量形成特征
DOI：
10.1626/pps.6.112
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发表时间：
2003
影响因子：
2.5
通讯作者：
M. Kokubun
中科院分区：
文献类型：
--
作者：
Motoki Takahashi;J. Arihara;N. Nakayama;M. Kokubun
摘要大多数超结瘤大豆品系的农艺性状均低于常规品种。我们之前对来自‘Enrei’品种的超结瘤突变体‘En6500’进行的测试表明，它的低生长和低产量并不一定是超结瘤所致。在通过与Enrei杂交来提高En6500产量的尝试中，我们最近成功地选择了一个生长旺盛的超结瘤品系。对这一新的超结瘤品系‘EN-BO-1-2’进行了三年的田间试验，结果表明，该品系的产量比En6500高得多。当总体产量水平较低时，它甚至倾向于比恩瑞产量更高。因此，EN-Bo-1-2表现出比迄今报道的其他超结瘤系显著更高的产量。提高产量的主要原因是：(A)籽粒灌浆良好，(B)开花期营养生长旺盛，(C)叶面积指数和叶N含量高，从而在豆荚和种子发育期产生更多的光合作用产物，促进氮素固定和干物质积累。
Abstract Most of the supernodulating soybean lines were agronomically inferior to conventional genotypes. Our previous tests with ‘En6500’, a supernodulating mutant derived from a variety ‘Enrei’, revealed that its low growth and yield were not necessarily due to supernodulation. In our attempts to improve the yield of En6500 through crossing with Enrei, we recently succeeded in selecting a supernodulating line showing vigorous growth. Field experiments with this new supernodulating line ‘En-bO-1-2’ for three years revealed that it yielded much more than En6500. When the overall yield level was low, it even tended to yield more than Enrei. En-bO-1-2 thus showed a remarkably higher productivity than other supernodulating lines reported so far. Its improved yield was largely due to : (a) better seed filling, (b) vigorous vegetative growth during flowering period, and (c) high leaf area index and leaf N content that enabled production of more photosynthates to enhance N fixation and dry matter accumulation during the period of pod and seed development.