汉中地区玉米杂交制种高产栽培技术

根据本地气候和自然条件,探索总结了玉米杂交制种要选择高产且配合力高的组合,亲本种子包衣、肥球育苗、合理密植、配方施肥、严格去杂等的规范化的高产制种技术。     

优质杂交油菜希望98高产栽培技术要点

通过引种试验、示范,杂交油菜希望98比对照秦优7号增产5．15％,成熟期提早2—3天,硫甙、芥酸含量较低,粗脂肪含量44．84％-46．68％,抗耐病性强,是一个高产、优质、抗逆性强的油菜品种,被列为2008年汉中市主推品种。栽培要点是：主攻“三早”,培育壮苗,力除“三害”,控氮增磷补钾配微,适时收获。     

一种求解函数优化的混合差分演化算法

为了解决传统遗传算法易陷入局部最优解的问题,在多父体杂交算法和差分进化算法的基础上,提出了混合差分演化算法.该算法的核心在于,采用多父体杂交算子保证算法的遍历性,通过淘汰相同个体来保持群体的多样性,并以较小概率随机选取部分个体进行差分进化操作,从而充分利用最优个体的信息达到了加快收敛速度的目的.对复杂函数的寻优实验验证了混合差分演化算法的有效性.     

Inductive transfer learning for unlabeled target-domain via hybrid regularization

Recent years have witnessed an increasing interest in transfer learning. This paper deals with the classification problem that the target-domain with a different distribution from the source-domain is totally unlabeled, and aims to build an inductive model for unseen data. Firstly, we analyze the problem of class ratio drift in the previous work of transductive transfer learning, and propose to use a normalization method to move towards the desired class ratio. Furthermore, we develop a hybrid regularization framework for inductive transfer learning. It considers three factors, including the distribution geometry of the target-domain by manifold regularization, the entropy value of prediction probability by entropy regularization, and the class prior by expectation regularization. This framework is used to adapt the inductive model learnt from the source-domain to the target-domain. Finally, the experiments on the real-world text data show the effectiveness of our inductive method of transfer learning. Meanwhile, it can handle unseen test points.     

The relationship of differential expression of genes in GA biosynthesis and response pathways with heterosis of plant height in a wheat diallel cross

Heterosis in internode elongation and plant height is commonly observed in hybrid plants, but the molecular basis for the increased internode elongation in hybrids is unknown. In this study, midparent heterosis in plant height was determined in a wheat diallel cross involving 16 hybrids and 8 parents, and real-time PCR was used to analyze alterations in gene expression between hybrids and parents. Significant heterosis of plant height and the first internode in length were observed for all 16 hybrids, but the magnitude of heterosis was variable for different cross combinations. Analysis revealed that the heterosis of the first internode was significantly correlated to that of plant height （r = 0.56, P 〈 0.05）, suggesting that the increased elongation of the first internode is the major contributor to the heterosis in plant height. Real-time PCR analysis exhibited that significant difference in heterosis of gene ex- pression was observed among all cross combinations. Moreover, heterosis of the first internode in length was correlated significantly and positively with expression heterosis of KS, GA3ox2-1, GA20ox2, GA20ox1D, GA-MYB and GID1-1, but significantly and negatively with expression heterosis of GAI and GA2ox-1, which is consistent with our recently proposed model of GAs and heterosis in wheat plant height, suggesting the alteration of GA biosynthesis and response pathways might be responsible for the observed heterosis in plant height.     

基因工程和细胞工程技术在马铃薯、油菜、向日葵遗传育种中的应用

一、项目介绍 1．农杆菌介导马铃薯转hrap基因的研究 采用农杆菌介导法,农杆菌选LBA4404株系,外植体为马铃薯组培苗叶盘,目的基因hrap。结果表明,hrap基因已经转入了3个马铃薯品种（大西洋,Russet Burbank,布尔班克）中。转基因植株经过两次抗卡那霉素培养基根选,约80％左右的植株再生;PCR和Southern杂交鉴定结果,证明目的基因已经转人了马铃薯中;RT—PCR检测结果表明转入的基因已得到表达;从转基因马铃薯中扩增出来hrap基因片段,     

贵州省优质两系法杂交水稻研究与应用

本文介绍了贵州省水稻研究所优质两系法杂交水稻的研究成果,通过两系法优质稻米示范推广应用,使稻农增收,也满足了消费者对优质稻米的需求。两用核不育系及两系法杂交水稻新组合的选育可协调杂交水稻品质和产量的矛盾。     

旱稻品种——郑旱6号

审定编号国审稻2005055 选育单位河南省农业科学院粮食作物研究所 品种来源郑州早粳×郑稻92—44 特征特性“郑旱6号”属粳型常规早稻品种,在黄淮地区作麦茬早稻种植全生育期平均为115天,     

鲁烟白猪

鲁烟白猪是以烟台黑猪为母本,以丹系长自猪为第一父本、斯格猪为第二父本杂交选育的瘦肉型猪新品种,于2007年6月通过国家畜禽遗传资源委员会审定。     

驻芝11号

“驻芝11号”是河南省驻马店市农业科学研究所以“驻81043”为母本,以“驻7801优系”为父本,通过有性杂交选育而成的芝麻新品种,于2003年3月通过全国芝麻品种鉴定委员会鉴定。