Abstract:IVA属低温敏感型雄性不育系,育性转换的温度敏感期为花粉母细胞形成中期至单核花粉期,光照长度对其育性无明显影响。温敏期的平均夜温是影响育性的主导因子,其临界值是20℃,此值在不同海拔高度条件下有差异;温敏期日均温临界值在低海拔点为24℃,在高海拔点略有降低。IVA的生育期感温性甚弱,在不同海拔点有较稳定的生育期。

Abstract:The carmine spider mite (CSM. Tetranychus cinnabarinus) is one of the most economically important insect pests on upland cotton in the Southern China. The purpose of this investigation is to test the inheritance of cotton resistance to CSM infestation. Th

Abstract:棉铃虫Heliothis armigera(Hübner)是棉花的主要害虫,在我国分布广泛,各地种群因地理环境不同,生理生化指标也有差异,从9个地区采集的棉铃虫,在实验室分别饲养至室内第2代后,分别测定了各地种群6龄幼虫血淋巴的游离氨基酸种类和含量,结果表明:氨基酸种类和含量各地种群间都存在差异,同地种群不同生育期亦表现出游离氨基酸的含量随着龄期的增长由低→高→低。上述不同特点为棉铃虫种下分类提供了依据。

Abstract:By assaying endogenous polyamines (PAsl and the application of inhibitor of PAs biosynthesis, a systematic study on the role of PAs in the transformation of HPGMR Nongken 58S has been carried out. The result clearly showed that though obvious relation bet

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Abstract:In this paper 15 species of termites including 6 newly collected ones. Were reported in Hubei province, which belong to a genera of 3 families. The newly recorded species are Reticuliternes speratus, R. fukienesis, Heterotermes dabieshanensis, Capritermes

Abstract:This paper presents a new method of researching undisturbed siol profile with the cation exchange membrane. The new method can determine "the transient release velocity" of available potassium in microzones of undisturbed siol profile.

Abstract:Boron deficiency caused the damages of differient tissues of sesame. The observation of sections with electron microscope showed that sesame leaves not only had deformed surface and deformed and closed stomas. but also had abnormal inner struture due to b

Abstract:The symbiotic plasmid pJBSJI of Rhizobium leguminosarum biovar viceae was transfered into R. huakuii strain 7653R (wild type, Nod+Fix~+) and strain 7653R+1 (sym plasmid-cured mutant from 7653R. Nod~-). 7653R+1 transconjugant can t nodulate pea ineffective

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Abstract:Samples of the brain tissues collected from two moribund in a dairy farm at the suburbs of Wuhan and from an adult buffalo that died of suspicious Pseudorabies were used as materials for virus isolation. The brain tissues being treated were inoculated ont

Abstract:Suyahu reservoir is a large lake like reservoir located in plain of Henan province. It covers an area of about 113.33 km~2 with average water depth of 1.4 m and transparency of 11 cm. The aquatic plants are mainly distributed in shallow water of 0.5 m, in