VARIATIONS IN BREEDING SYSTEMS OF A WILD RICE ORYZA PERENNIS
VARIATIONS IN BREEDING SYSTEMS OF A WILD RICE ORYZA PERENNIS
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DOI：
10.1111/j.1558-5646.1967.tb00153.x
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发表时间：
1967-01-01
期刊：
影响因子：
3.3
通讯作者：
MORISHIMA, H
中科院分区：
文献类型：
--
作者：
OKA, HI;MORISHIMA, H
对O.对世界热带国家的多年生宿根植物Perennis Moench的繁殖系统进行了研究。O.短沟苔和罗尔。和栽培稻O. sativa L.和O.光叶草观察比较。假设两个变化轴，一个关于授粉系统，另一个关于种子和营养繁殖的相对程度。前者表示的组合测量的时间间隔从开花到花粉排放，柱头和花柱大小和花粉粒数每花药;后者从离体茎段的再生能力，种子数单株，“芒发展指数”和“种子休眠指数”。所有这些性状的变异都是相互关联的，从相关性可以得出结论，主要通过种子繁殖的菌株倾向于相对自花受精。无性繁殖有三种方法：丛生、根茎形成和分蘖分离。大多数非洲和少数亚洲以及大洋洲的菌株是根matous，而一些亚马逊河流域的菌株显示分蘖分离。
A number of genetic stocks of O. perennis Moench, collected from various tropical countries of the world, were investigated regarding various characters related to the breeding system of the species. O. brevlll-gulata Chev. et Roehr. and cultivated rice species, O. sativa L. and O. glaberrima Steud. were observed for comparison. Two variation axes were assumed, one concerning the pollination system, and the other concerning the relative extent of seed and vegetative propagation. The former was expressed by a combination of measurements for the time interval from flowering to pollen emission, stigma and style size and pollen-grain number per anther; the latter from the regenerative ability of excised stem segments, seed number per plant, "awn-development Index" and "seed-dormancy Index". Variations in all these characters were intercorrelated, and it was concluded from the correlations that strains propagated mainly by seeds tend to be relatively autogamous. Three methods for vegetative propagation were found, cespitose growth, rhizome formation, and tiller separation in water. Most African and a few Asian as well as Oceanian strains were rhizo-matous, while some Amazonian strains showed tiller separation.