荷兰甜菜多粒品种ADV0420引种鉴定

甜菜二倍体新品种ADV0420是荷兰安地公司选育的雄不育二倍体多粒种,由包头华资实业股份有限公司引进试种。在2005年内蒙古自治区甜菜品种生产试验中,根产量66.95t/hm2,比对照增产24.7%,含糖率16.162%,比对照低0.362度,产糖量10.815t/hm2,比对照增加22.2%。达到了内蒙古自治区丰产型甜菜品种标准。

甜菜多倍体新品种农大甜研6号的选育

农大甜研6号（原名农大08-02）是由内蒙古农业大学甜菜生理研究所利用自育二倍体自交系NDWF-1208与四倍体自交系NDWZ4602,以6∶2的比例配制而成的甜菜普通多倍体多粒新品种.于2010 ～ 2011年参加内蒙古自治区甜菜品种区域试验,并完成生产试验.在2年的区试中表现出较强的丰产性和稳产性,在2011年生产试验中平均单产4 692.3 kg/667 m2,比对照增产18.92％;平均含糖量16.18％,比对照增加0.5度.该品种叶丛直立,叶片犁铧形,抗褐斑病、根腐病,对丛根病有一定的耐性.2012年4月通过内蒙古自治区农作物品种审定委员会审定并命名.

“万里挑一”选育好种子!

历时12年精心培育,从36000多粒种子中挑选2株,培育出全新的水稻品种,各类营养比普通水稻提高了30%~300%,成为真正意义上的全营养米,这就是我国首创的“中紫”系列高营养水稻,目前已经在56个国家申请了国际专利,用以保护水稻性状。“民以食为天”,随着经济条件不断向好,人们已经从吃饱转变为追求如何吃得好、吃得更健康。

甜菜二倍体雄性不育多粒品种——BHK2号的选育

甜菜二倍体雄性不育多粒杂交种——BHK2号，是包头华资实业股份有限公司甜菜研究所育种部与德国KWS公司，自2002年开始合作选育的新品种。该品种丰产性好，含糖稳定，抗褐斑病和根腐病，对丛根病有一定耐病性。在2006～2007年的内蒙古自治区甜菜品种区域试验中，两年平均块根产量比对照甜研309分别提高22．22％，含糖率比对照低0．27度。在2007年的生产试验中，块根产量和含糖率分别比对照提高17．43％和0．62度。BHK2号达到了内蒙古自治区《糖用甜菜品种审定认定标准》，2008年经内蒙古自治区农作物品种审定委员会审定并命名。

Genetic diversity and population structure of Marsh Grassbird (Locustella pryeri sinensis) in China

We used sequences of mitochondrial control region （807bp） in 75 samples from three breeding colonies and one wintering population to investigate the genetic diversity and population structure of Marsh Grassbird （Locustella pryeri sinensis） in different regions of China. Marsh Grassbird retained a moderate amount of haplotype （0.759 ± 0.056） and nucleotide diversity （0.002）. The results of FST among 3 phy-logeographic units and ФST between breeding and wintering sites revealed little evidence of genetic distinction between different colonies. Neither UPGMA tree structure analysis nor Network picture analysis showed obvious divergence between populations at different locations. Analysis of molecular variance also showed a lack of regional subdivision within Locustella pryeri sinesis, 98.5% of source of variation within populations and only 1.5% among populations. The neutrality test showed negative Fu’s FS value, which, in combination with detection of the mismatch distribution, suggested that population expansion occurred in the evolu-tionary history of this species. This hypothesis was further supported by Tajima’s D test and Fu’s test （D = -1.80, p = 0.02; Fs = -22.11, p = 0.001）, this expansion was estimated to occur about 28,700 years ago.

Improved PSO for integrating dynamic cell formation and layout problems

To decrease the impact of shorter product life cycles,dynamic cell formation problems(CFPs)and cell layout problems(CLPs)were simultaneously optimized.First,CFPs and CLPs were formally described.Due to the changes of product demands and the lim it of machine capacity,the existing layout needed to be rearranged to a high degree.Secondly,a mathematical model was established for the objective function of minimizing the total costs.Thirdly,a novel dynamic multi-swarm particle swarm optimization(DMS-PSO)algorithm based on the communication learning strategy(CLS)was developed.Toavoid falling into local optimum and slow convergence,each swarm shared their optimal locations before regrouping.Finally,simulation experiments were conducted under different conditions.Numerical results indicate that the proposed algorithm has better stability and it converges faster than other existing algorithms.

Genetic diversity and population structure of Eleutheronema rhadinum in the East and South China Seas revealed in mitochondrial COI sequences

Eleutheronema rhadinum is a potential commercial fisheries species and is subject to intense exploitation in China. Knowledge on the population structure of E. rhadinum in Chinese coastal waters, which is important for sustainable exploitation and proper resource management, is lacking. In the present study, the genetic diversity and population structure of E. rhadinum were evaluated using a 564-base pair fragment of the mitochondrial cytochrome c oxidase subunit I （COl） gene. A total of 76 specimens were collected from three localities around the East （Qidong and Zhoushan） and South China Seas （Zhuhai）. Among these individuals, nine polymorphic sites were detected and 1 l distinct haplotypes were defined. High levels ofhaplotype diversity （h=0.759i0.035） and low levels of nucleotide diversity （re=0.001 98i0.003 26） were observed in these populations, Hierarchical analysis of molecular variance （AMOVA） indicated that 96.72% of the genetic variation occurred within the populations, whereas 3.28% occurred among populations. No significant genealogical branches or clusters were recognized on the neighbor-joining tree. Intra-group variation among populations was significant （~0~t=0.032 85, P〈0.01）. These results suggest that E. rhadinum populations in the East and South China Seas have developed divergent genetic structures. Tests of neutral evolution and mismatch distribution suggest that E. rhadinum may have experienced a population expansion. The present study provides basic information for the conservation and sustainable exploitation of this species.

浆果进城

知识卡片浆果,是一类多汁肉质单果的统称。由一个或几个心皮形成,含一粒至多粒种子。如香蕉、番茄、酸果蔓。

猜你不知道

石榴的“老家”是巴尔干半岛至伊朗等地区。如今,它遍布温带地区和热带地区。在我国,人们栽培石榴的历史可追溯至汉代,西晋人张华编纂的《博物志》载:“汉张骞出使西域,得涂林安石国榴种以归,故名安石榴。”石榴是浆果。浆果是一类由子房或子房联合花的其他部分发育成的柔软多汁的肉质果,内有一粒或多粒种子。

Corrosion Resistance Enhancement of Pure Zirconium in Various Environments via Microstructure Tailoring

The corrosion properties of pure zirconium(Zr)with different grain sizes in acid,alkali,and salt environments were studied.The microstructures of pure Zr were observed by optical microscope,X-ray diffractometer,and electron backscattered diffraction probe.The corrosion resistance of pure Zr was analyzed by electrochemical corrosion test and immersion test.Results show that pure Zr with grain size of 4–32μm can be obtained after annealing at 800°C for different durations,and the relationship between grain size and annealing duration is D^(3)−D_(0)^(3)=3.35t.The electrochemical corrosion and immersion corrosion test results show that the pure Zr with grain size of about 24μm(annealing at 800°C for 20 h)possesses the optimal corrosion resistance.