滇型杂交粳稻新组合滇杂40

滇杂40是云南农业大学稻作研究所用育性稳定的滇Ⅰ型不育系楚粳23号A与优质抗病恢复系南34配组育成的滇型杂交粳稻新组合,具有高产稳产、稻瘟病抗性强、适应性广等特点,于2009年4月通过云南省农作物品种审定(滇审稻2009001)。     

临澧县一季超级杂交晚稻“种三产四”高产栽培技术

2007—2009年,临澧县连续3a实施一季超级杂交晚稻"种三产四"丰产工程示范,经专家测产验收,3a平均单产达9.44t/hm2,核心示范片平均单产达到11.4t/hm2。通过总结、分析项目实施的技术措施和保障措施,提出了适时播种、场地育苗、乳苗浅栽、合理稀植、配方施肥、科学管水等配套高产栽培技术。     

超级杂交中稻Y两优7号“种三产四”示范表现及高产栽培技术

Y两优7号是湖南杂交水稻研究中心育成的超高产两系杂交水稻新组合,具有分蘖力强、抗高温、耐低温、产量高、米质优、适应性强的特点,适合在桃源作中稻栽培。介绍了该组合在桃源"种三产四"丰产工程示范中的表现及高产栽培技术。     

添加纳米碳缓释肥料对超级杂交稻产量和氮肥利用率的影响

在大田条件下,研究了添加纳米碳的缓释肥料对超级杂交中稻Y两优1号的产量、氮肥利用率及田面水总氮含量的影响.结果表明,与不添加纳米碳处理相比,添加纳米碳的金正大缓释尿素和添加纳米碳的史丹利缓释复合肥均能促进水稻分蘖的形成,增加孕穗期叶绿素含量,增加干物质累积量、有效穗、每穗实粒数,从而增加稻谷产量,提高氮肥利用率,并能降低田面水中总氮含量,减少氮肥造成的水环境污染.     

Relationship of Parental Indica-Japonica Indexes with Yield and Grain Quality Traits of Japonica Hybrid Rice in Northern China

Taking the main parents (10 male sterile lines and 10 restorer lines) and their 100 combinations of japonica hybrid rice in northern China as materials, the relationships of parental indica-japonica indexes determined by the methods of the Cheng's index as well as simple sequence repeat (SSR) markers with yield and grain quality traits of hybrid rice were studied. For the parents, the Cheng's index (Chi) ranged from 13.5 to 19.3 and the indica index in SSR markers (ADi) were from 0.12 to 0.38. The classification of parents by Chi was not completely consistent with that by ADi. The Chi of male parent was more closely related to hybrid traits than that of female parent, as contrasted to ADi. At the same time, the difference between parents (PD) in Chi was more closely related to hybrid traits than that in ADi. The indica-japonica indexes of parents and their difference between parents appeared quadratic relationship to hybrid traits with the critical extremum. The directions of the correlation of indica-japonica indexes of parents and their differences with hybrid yield traits were on the opposition to those with hybrid grain quality traits. Therefore, the female parent should match the male parent moderately in indica-japonica index to obtain the optimum of hybrid traits, high yield as well as good quality.     

Comparison of Morphological and Genetic Differentiations in Filial Generation of Cross Between Indica and Japonica Rice

A recombinant inbred line (RIL) population of F8 and F9 generations derived from a cross between a typical indica rice (Qishanzhan) and a typical japonica rice (Akihikari) was used to study the difference between morphological differentiation based on phenotype characters and genetic differentiation using indica and japonica specific SSR markers, and to evaluate the relationship between vascular bundle characters and morphological and genetic differentiations. The results showed that the frequency distributions of morphological and genetic differentiations were all inclined to japonica type in the filial generation. The population was more inclined to japonica type based on genetic differentiation than on morphological differentiation. The consistent degrees of classification based on the Cheng's index, the ratio of large vascular bundle number to small vascular bundle number in panicle neck (RLSVB) and the ratio of large vascular bundle number in the second internode from the top to that in the panicle neck (RLVB) were all about 50% compared with the genetic differentiation, and the consistent degree of the total scores of the Cheng's index combined with the vascular bundle number ratios was significantly increased to about 80% compared with the genetic differentiation. Therefore, the vascular bundle characters could be used as a helpful supplement for subspecies classification.     

不同移栽期对粳稻品质的影响

采用不同移栽期对2008年辽宁省水稻区域试验中晚熟A组14个水稻品种的9个品质性状进行变异分析及主成分分析,结果表明:不同移栽期对稻米不同品质性状的影响不同;综合6移栽期稻米品质性状达优质稻谷国标的概率,胶稠度的达标率最高,垩白度表现最差,一级达标率为0;不同品质性状对移栽期变化所表现的变异程度不一致,垩白度、垩白粒率变异最大,其次是整精米率和胶稠度,长宽比的变异度最小;主成分分析中,包含糙米率、精米率、整精米率和垩白度的第一主成分因子对稻米品质的贡献最大,贡献率达42.78%,其次是胶稠度和碱消值,与前者的累计贡献率达60.72%。     

盐城市滩涂盐碱地种植粳稻情况调查

盐城市拥有广阔的滩涂,全市现有40.9万hm2,占全国的近七分之一,其中,潮上带16.7万hm2,潮间带16.0万hm2,辐射沙洲12.7万hm2,而且每年还以0.2万hm2左右的速度向大海淤长,这为发展盐土农业提供了得天独厚的基础条件.同时也是盐城市发展粳稻生产,保证粮食安全,增加农民收入的潜力所在,希望所在.     

粳稻谷粒重及粒形性状的变异及相关性研究

以385份粳稻品种为试材,研究了稻谷粒形性状和谷粒重的变异特点,稻谷粒形性状与谷粒重的关系。结果表明,所分析的粳稻样本在谷粒重、谷粒容积、谷粒体积上变异幅度较大,具有一定的选择潜力。谷粒重与粒形性状间均达到极显著正相关,谷粒体积与谷粒长、宽、厚均达到极显著正相关,谷粒长与谷粒厚达到极显著负相关,谷粒厚与谷粒宽达到极显著正相关。谷粒重受各粒形性状共同影响,其主要由谷粒宽和谷粒体积所决定的,而谷粒体积则主要由谷粒宽和谷粒厚所决定。     

优质粳稻通粳777特征特性及栽培技术要点

通粳777是通化市农业科学研究院选育的高产、抗病、米质优良的水稻新品种。生育期134 d,需≥10℃活动积温2 650℃左右,属中早熟优质米品种。适合在吉林省白城、松源、通化、四平和吉林东部等中熟、中早熟稻作区种植。