水稻低温敏不育系培矮64S的开花及制种特性

对培矮６４Ｓ盛花期、花时、颖花开张角度和开张时间进行了观察,研究了培矮６４Ｓ柱头活力保持期和柱头外露情况,并就其高产制种技术进行了讨论。     

培矮64S在我市初次制种及再生繁殖的管理技术

培矮64S在我市中稻制种、播种期宜安排在6月1日-6月20日,始穗扬花期在8月22日至9月10日,这样可以使夏秋台风对制种异交结实的影响较小。     

两系杂交水稻培两优288高产保质制种原理与技术

为探讨两系杂交水稻培两优２８８高产保质制种原理与技术,对母本培矮６４Ｓ不育性表达及制种基地气候生态条件的要求,父母本生长发育规律,制种异交特性及异交栽培种子保纯,黑粉病防治等技术措施进行了研究,结果表明,该组合适宜在湖南－季稻区夏制,湘中、湘南双季稻区秋制,以生敏感期和抽穗授粉安全为前提选择制种基地和安排播种期,对父母本实行定向栽培,母本群体要求稳长、多穗、整齐、父本要求多穗、大穗、花粉量足,母本     

杂交水稻“培矮64S”制种防杂保纯技术

阐述了杂交水稻"培矮64S"的制种防杂保纯技术。     

两系杂交粳稻两优2887母本直播高产制种技术

两优2887（NC228S/R187）是湖北省农业科学科院粮食作物研究所育成的两系杂交粳稻组合。根据两优2887多年多点制种实践,并结合双亲的主要特征特性,总结了该组合母本直播高产制种技术。     

湖北省两系杂交稻制种的安全期分析

选取湖北省公安县、石首市和黄陂区3个主要制种基地为研究对象,利用1960-2015年逐日气温、降水气象资料,计算在不同临界温度指标下育性转换安全期保证率,确定保证率最高的育性转换时期;通过计算水稻扬花授粉期易遭受的高温热害、低温冷害和连阴雨灾害的综合危害指数确定水稻综合危害指数最低的扬花授粉期;综合考虑两个关键时期的安全时段确定水稻制种最佳育性转换安全期和扬花授粉安全期。结果表明,公安县临界温度为23.0、23.5和24.0℃的育性转换安全期最佳时段均在7月24至8月12日;石首市临界温度为23.0℃时,7月25日是杂交稻进入育性转换期最佳时间,临界温度为23.5℃和24.0℃时的杂交稻最佳育性转换期应安排在7月24日至8月12日期间;黄陂区临界温度为23.0℃时,7月25日或27日进入育性转换期均可,临界温度为23.5℃和24.0℃时,杂交稻最佳育性转换期为7月27日至8月15日。     

两系杂交水稻新组合苯两优3113制种技术

根据制种实践,总结了苯两优3113的制种技术：为了获得高产、稳产,苯两优3113在制种方面应选择合适的基地,合理安排播期,合理安排父母本行比,加强肥水管理,适度割叶,严格除杂,搞好人工授粉,抓好病虫防治等。     

杂交水稻新组合健优388的制种技术

健优388是贵州省水稻研究所用自育恢复系黔恢1388与湖南金健种业有限责任公司三系不育系健645A组配而成的迟熟籼型三系杂交种,于2010年通过贵州省农作物品种审定委员会审定(审定编号:黔审稻2010003号)。该组合高产、抗倒、耐寒,适宜在贵州迟熟一季中稻区种植。为了加快贵州杂交水稻品种的更新,促进新品种在生产上的应用,对杂交水稻新品种健优388的制种技术进行探索实践,提出了健优388新组合的制种技术要点。     

水稻新品种广两优476高产高效优质制种技术

阐述了广两优476在江苏中北部地区三年来规模化制种中采取的主要措施和对策.重点对播期、扬花期的安排提出了多方位论述;同时,对努力提高制种产量,提高制种效益,确保制种质量提出了操作方案,也对制种中存在的问题提出了思考.     

Research on Theories and Techniques of Irrigation for Safeguarding Seed Production of Two-Line Hybrid Rice

By inducing frequency, intensity and duration of lower temperature in the middle and last ten-day periods in August in the rice-growing areas of southern China, increasing temperature for safe seed production was defined as 2℃. During the sensitive period of fertility, characters of panicle height and canopy structure of TGMS rice, Pei＇ai64S, were measured. Results showed that temperature changes caused by irrigation in fields were below 40 cm of rice plant, and heating effect was significant at 20 cm when the temperature was increased by 3.1 ℃. For the present study, the following irrigation techniques were put forth： the water depth of 15-20 cm, current water used, irrigating after 17：00 and bailing at 10：00 in sunny or cloudy weather, irrigating on whole day, in shady or rainy weather, increasing inflows and outflows in large fields. In the present experiment, pollen fertility and self-fertilized seed setting rate accepted that the techniques were feasible and effective for against lower temperature and safeguarding seed production of two-line hybrid rice.     

Studies on Heteroses of Pei‘ai 64S／Javanica Rice

Agronomic traits and heteroses of javanica varieties and the indica/javanica hybrids in Changsha are reported. Javanica rice exhibits long panicles, big grains, less panicles per plant, a long growth duration and high plant height in Changsha. The hybrid of Pei'ai 64S/javanica possesses positive heterobeltiosis in culm height, panicle length, panicles per plant, spikelets per panicle, grains per panicle, yield per plant, theoretic yield per hectare and actual yield per hectare; performs negative heterobeltiosis in days to flower, seed setting rate and 1000-grain weight. There are significant linear regression relations between culm height of the hybrid and panicle length of its male parent, panicle length of the hybrid and that of its male parent, spikelets per panicle of the hybrid and spikelets per panicle and panicle length of its male parent, grains per panicle of the hybrid and spikelets per panicle of its male parent, 1000-grain weight of the hybrid and spikelets per panicle of its male parent, respectively. In general, significant differences at 1% level are seen in most traits except grains per panicle and theoretic yield per hectare between the indica/javanica hybrid and Pei'ai 64S/Teqin (CK). Compared with the check, the indica/javanica hybrids have positive standard heterosis in culm height, panicle length, spikelets per panicle, grains per panicle and 1000-grain weight but negative standard heterosis in days to flower, panicles per plant, seed setting rate, theoretic yield per hectare and actual yield per hectare. For the individuals, 11.1% hybrids possess > 40% standard heterosis in theoretic yield per hectare, 3.7% possess >40% standard heterosis in actual yield per hectare. The javanica restorer line 770 derives from a single cross of Pei'ai 64S/Moroberekan B-51-4-9-2. The hybrid 43S/770 possesses an elite plant type and strong heterosis.     

吉安市两系杂交早稻株两优175晚春抛栽高产制种技术

从合理安排生产进程与选好播差期、抓好各个生育时期的技术措施2个方面总结了吉安市两系杂交早稻株两优175晚春抛栽高产制种技术,以供参考。     

杂交粳稻“秋优金丰”高产制种技术的优化

提高杂交稻制种产量是降低水稻种子生产成本、加速杂交稻推广的有效途径之一。试验选用杂交粳稻＂秋优金丰＂亲本-R44和秋丰A为材料,对两亲本的生育特性和开花习性进行观察,开展了一系列杂交粳稻＂秋优金丰＂相关制种技术和栽培技术的研究。结果表明,采用机插秧、割叶处理、适宜的肥水,以及＂920＂农药对制种亲本的穗位差和花期的调节等处理有利于杂交制种产量的提高。这为该品种的大面积推广提供相应的技术支持。     

杂交水稻新组合奇优894高产制种技术研究

为给贵州省杂交水稻新组合的高产制种提供理论参考,对杂交水稻新组合奇优894父母本的不同栽插模式父母本的分蘖动态、开花时间、母本结实率、制种产量进行比较分析,结果显示:以杂交水稻组合奇优894的父母本都采用三角形栽插,父母本行比为2∶16的制种效果最好,利用这种栽培模式父母本有效分蘖数多、开花时间长、母本的结实率高,杂交种子产量高达301.2 kg/667m~2.为杂交水稻新组合的高产制种,提供了一套全新的栽培模式.