The Research Progress on Erect Panicle Type of Rice
The Research Progress on Erect Panicle Type of Rice
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发表时间：
2002
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通讯作者：
Chen Wen-fu
中科院分区：
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作者：
Chen Wen-fu
综述了不同穗型水稻品种的生理生态特性，并对不同穗型水稻品种的穗部功能、性状及遗传进行了分析，结果表明：穗部光合能力差，处于非同化器官的地位，直立穗型水稻品种的成熟率和粒重随光照强度减弱而明显下降，穗部功能、性状及遗传均与直立穗型水稻品种不同，穗部功能、性状及遗传均与直立穗型水稻品种不同。直立穗结实率低的原因是二次枝穗结实率相对较低，一次枝穗结实率和穗粒结实率较高，二次枝穗结实率较低。二次枝梗对穗粒数的增加起重要作用。水稻穗型受核主效基因控制，可分为两类，直立穗型群体的基因具有一定的多效性，这与性状的变异有关，直立穗型群体的光照、温度、湿度和CO2浓度均优于弯曲穗型群体的上级，叶面积指数后期衰减相对较慢，高CAP期较长，直立穗型群体具有较大的干物质生产能力和较高的生物产量，这是其经济产量较高的物质基础。
The physiological and ecological properties of different panicle type rice were overviewed,the different panicle function,charˉacter and heredity were also surveyed.It showed that the panicle had little photosynthetic capacity and posited as non-assimilating organ.The rate of maturity and seed weight of the erect panicle type detracted obviously when the intensity of illumination weakened,and they were lower than the curved one.The reason of low seed rate of erect panicle was the second ramifications'seed rate being lower relatively.Higher seed ratio in the first ramifications and the spike-stalk of the second ramifications was important for more seeds on panicles.Rice panicle type is controlled by major nuclear genes,which can be divided into two types,dominance and recesˉsives.The gene of erect panicle type has certain pleiotropism,which can be interrelated to the properties variation.The illumination,temperature,humidity and concentration of CO 2 in the erect panicle type population are superior to the curved one,and the LAI has relatively slower attenuation in the anaphase and has a longer high CAP period.So the erect panicle type population has a bigger dry material production capacity and higher biological yield,these are the physical basis of high economic yield.