优质高产高油多抗油菜新品种常杂油2号的选育

常杂油2号是用核不育两型系G212A与双低恢复系S15配组育成的甘蓝型双低黄籽细胞核雄性不育两系杂交油菜新品种.该品种具有高产、优质、多抗、高含油量等特性,于2011年通过湖南省农作物新品种审定委员会审定.     

优质黄籽杂交油菜新品种黔黄油21号的选育研究

黔黄油21号是甘蓝型油菜黄籽不育系2225A与商含油量双低恢复系ZW3115杂交、鉴选出的优质、高产、抗逆性强的双低黄籽甘蓝型杂交油菜新品种.在贵州省油菜区试中的平均产量为175.27 kg/667 m2,比对照(油研10号)增产7.00%,区试中最高产量达230.33 kg/667m2.含油量为46.28%、籽粒中的蛋白质含量为22.27%、芥酸含量为0.20%、硫甙含量为22.48μmol/g·饼.干2007年12月通过贵州省农作物品种委员会审定.     

甘蓝型黄籽油菜细胞质雄性不育系盐2A的选育

应用品种间杂交,将优质黄籽品系“D180-1”的黄籽性状导入细胞质雄性不育保持系“盐1B”及其不育系“盐1A”中,育成了甘蓝型黄籽油菜细胞质雄性不育系“盐2A”和保持系“盐2B”。盐2A黄籽株率达91.0%,黄籽度3.93,不育性彻底,品质双低。与黑籽恢复系及黄籽恢复系材料配组,可选择到强优势组合。     

甘蓝型低芥酸杂交油菜新品种杂油57

"杂油57"系陕西省杂交油菜研究中心利用雄性不育三系法选育的低芥酸三系优质杂交油菜品种,其组合为甘蓝型双低(低芥酸、低硫甙)细胞质雄性不育系陕3A×单低(低芥酸)雄性不育恢复系垦C7.1993年育成,2000年1月被陕西省农作物品种审定委员会审定推广.     

甘蓝型杂交油菜新组合比较试验

对双低甘蓝型杂交油菜品种(组合)进行生产试验,考察参试品种(组合)的适应性、抗性、生育期、产量和综合性状,为在生产中全面推广优质双低甘蓝型杂交油菜新品种(组合)提供依据.     

优质高产高油多抗油菜新品种常杂油2号的选育

常杂油2号是用核不育两型系G212A与双低恢复系S15配组育成的甘蓝型双低黄籽细胞核雄性不育两系杂交油菜新品种。该品种具有高产、优质、多抗、高含油量等特性,于2011年通过湖南省农作物新品种审定委员会审定。     

高产耐病双低油菜新品种“赣油17号”的选育

“赣油 1 7号”是以双低品系“83-64-1”(“马努 /甘油 5号”)为母本 ,“甘油 5号 /川油 8号”的选系“9A0 3”为父本 ,通过杂交选育而成的高产、优质、耐病的甘蓝型中偏早熟双低油菜新品种。江西省和长江中游区域试验结果均比对照“中油 82 1”增产 2 .1 %以上 ;硫甙含量为 2 1 .4μmol/g(饼 ) ,芥酸含量为 0 .44 % ,含油量达 39.94% ;成熟期比对照早熟 1～ 2d,适于稻稻油三熟和油菜花生及油菜棉花两熟种植。该品种于 2 0 0 0年 4月通过江西省农作物品种委员会审定。     

双低甘蓝型油菜新品种--镇油2号

镇油2号(原名镇9502)是我所育成的双低甘蓝型油菜新品种,1999年8月通过江苏省农作物品种审定委员会审定并定名。1　镇油2号的选育经过1987年我们用综合性状突出的常规油菜品种宁油7号作母本,德国引进的双低油菜品种ＣＨＲ1617作父本杂交,经多年自交分离定向选育,于1992年育成3个双低株系,1993～1994年进行株系比较试验,1995年选一个丰产性好,抗逆性强,且各主要性状已基本稳定的株系(代号9502)升入品系比较试验,1995～1996年参加镇江市油菜区域试验,1996～1998年参加江苏省油菜区域试验,1998～1999年度参加江苏省优质油菜生产试验。2　镇油2…     

高油双低核不育杂交油菜新品种贡油6201的选育

“贡油6201”是自贡市农业科学研究院以杂黄籽甘蓝型隐性核不育中熟两用系“BZ222AB”与双低优质中熟恢复系“7(50)R”杂交、鉴选出的高油、高产、双低甘蓝型杂交油菜新品种。2019～2021年度参加四川省科乐油菜新品种联合试验,两年平均产量187.88kg/667m²,平均芥酸含量0.598%,商品菜籽硫苷含量25.34μmol/g(饼),平均含油量50.2%,籽粒褐色。2022年通过农业农村部登记,登记编号GPD油菜(2022)510169。该品种含油量和产量均较高,在四川平坝、丘陵冬油菜区具有较高的推广应用价值。     

甘蓝型杂交油菜新品种宁杂11号的选育与栽培技术

甘蓝型杂交油菜新品种宁杂11号原名HY8,是江苏省农业科学院经济作物研究所利用隐性细胞核雄性不育两用系G2A与双低恢复系P10组配的杂交油菜新组合,2007年通过国家品种审定委员会审定.     

Transformation of a star into a planet in a millisecond pulsar binary

Millisecond pulsars are thought to be neutron stars that have been spun-up by accretion of matter from a binary companion. Although most are in binary systems, some 30% are solitary, and their origin is therefore mysterious. PSR J1719-1438, a 5.7-millisecond pulsar, was detected in a recent survey with the Parkes 64-meter radio telescope. We show that this pulsar is in a binary system with an orbital period of 2.2 hours. The mass of its companion is near that of Jupiter, but its minimum density of 23 grams per cubic centimeter suggests that it may be an ultralow-mass carbon white dwarf. This system may thus have once been an ultracompact low-mass x-ray binary, where the companion narrowly avoided complete destruction.     

Action at a distance along a DNA

A number of ways are known by which an event at one location on a DNA molecule can affect an event at a distant location on the same molecule. Three classes of mechanisms are described for such distal actions: tracking or translocation of a protein along a DNA, the association of two proteins bound at separate sites to form a DNA loop in between, and distal interactions that are affected by the topology of the DNA. The basic characteristics of each type of mechanism are discussed in terms of the known physicochemical properties of DNA. The various modes of action at a distance are often interrelated. Examples include the formation of positively and negatively supercoiled DNA loops by tracking and the strong effects of DNA topology on looping.     

Development of a receptor on a foreign nerve fiber in a Pacinian corpuscle

When the sensory fiber of a Pacinian corpuscle (in cat mesentery) is transected (at the inferior mesenteric nerve) transduction fails within 30 hours: the nerve ending produces no generator potentials in response to mechanical stimulation. Electrically elicited nerve impulse conduction continues for at least another 18 hours. A transducer mechanism develops on a regenerating nerve fiber when this fiber enters the denervated corpuscle. Such transducer development takes place on myelinated fibers from the inferior mesenteric nerve, which normally supplies corpuscles, as well as on myelinated hypogastric nerve fibers, which normally do not go to corpuscles, including fibers larger than the original corpuscle afferents.     

Conversion of a peroxiredoxin into a disulfide reductase by a triplet repeat expansion

Pathways for the reduction of protein disulfide bonds are found in all organisms and are required for the reductive recycling of certain enzymes including the essential protein ribonucleotide reductase. An Escherichia coli strain that lacks both thioredoxin reductase and glutathione reductase grows extremely poorly. Here, we show that a mutation occurring at high frequencies in the gene ahpC, encoding a peroxiredoxin, restores normal growth to this strain. This mutation is the result of a reversible expansion of a triplet nucleotide repeat sequence, leading to the addition of one amino acid that converts the AhpC protein from a peroxidase to a disulfide reductase. The ready mutational interconversion between the two activities could provide an evolutionary advantage to E. coli.     

一个具有非自治性扰动的拟线性椭圆方程非平凡解的存在性

利用变量替换和Ekeland变分原理,在R～N上获得了一类具有非自治扰动的拟线性椭同方程非平凡解的存在性结果.

Abstract：

The existence of a nontrivial solution is obtained for a quasilinear elliptic equations on RN with a non-autonomous perturbation by the change of variable and the Ekeland's variational principle.