优质早籼稻“佳禾早占”稻米品质性状的遗传稳定性研究

对优质早籼稻“佳禾早占”连续 3a和异地栽培的早晚季稻米品质的分析结果表明 :“佳禾早占”的早季稻米品质符合部颁二级标准 ;晚季稻米品质符合部颁一级标准。“佳禾早占”稻米品质性状具有很强的遗传稳定性 ,极具应用价值。稻米品质性状是由品种的基因型和环境因素互作的结果。在水稻黄熟期前 ,尤其是在扬花后 ,有 10d左右的日最高气温大于 30℃ ,或日平均气温 2 8℃ ,稻米品质变差。在各品质性状中 ,整精米率最容易受影响 ,年度间可相差几十个百分点。选育耐高温的品种 ,是使早稻米品质达到较高水平的保证

优质早籼稻品种佳禾早占的选育和应用

采用有性杂交和水稻成熟花粉辐照诱变育种技术相结合，选育出福建省第一个优质早籼稻品种“佳禾早占”。其产量水平 ４００～４５０ ｋｇ／６６７ｍ ２，高的 ５００ ｋｇ／６６７ ｍ２以上；稻米品质符合部颁优质食用米标准，经济效益好，是福建省主要推广的优质早稻新品种。福建省自然科学基金;; 农业科技项目资

Breeding and Applicantion of Jiafuzhan——A New Breed of Early Indica Rice of High Quality

经过20多年的研究,采用自创的优质早籼稻新品种选育新途径,选育出大粒(千粒重30 g)优质、高产、稳产、抗病虫、适应性广的早籼稻新品种佳辐占.其品质基本上达到了部颁一级优质食用米标准,千粒重、长宽比、垩白度都是当前国内优质早籼稻品种中最好的品种之一.产量水平400~450 kg/667 m2,高产的超过500 kg/667 m2.广西、江西、广东等省、区已引种成功.2003~2004年在福建省推广11.4×104hm2,为农民增收2亿多元.该品种的育成,解决了水稻育种中长期存在的大粒不优质,早籼稻难优质,优质不高产,优质不抗病等难题.After 20 years' dedicated research under new technologies in breeding high-quality new-breed early indica Rice,Jiafuzhan has been successfully breeding.Its quality has almost reached A-level Editable Rice of Agriculture Department of China,and its average production reaches 400~450 kg/667m~2.with high yield production of 500 kg/667m~2.This new breed also has other characteristics such as enhanced resistance of blast and fallen,steady productivity and strong adaptability.Jiafuzhan has been put into production of over 11.4×10~4 hm~2 in Fujian Province and has been introduced and promoted in other provinces like Jiangxi,Guangdong and Guangxi.The successes of breeding Jiafuzhan is a solution to long existed problems in rice industry,such as low quality of big,grain rice and early indica rice,low productivity and poor blast resistance of high quality rice.农业部转化资金(02EFNZ16900762);; 福建省水稻育种攻关项目;; 福建省重大专项(2004NZ01-3);; 福建省三项费用(2000-Z-029);; 厦门市农业创新(3502Z20032007);; 国家后补助基金(2004年)资

JUNO Sensitivity on Proton Decay p→νˉK+p\to \bar\nu K^+ Searches

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in $p\to \bar\nu K^+$ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar\nu K^+$ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is $9.6 \times 10^{33}$ years, competitive with the current best limits on the proton lifetime in this channel

JUNO sensitivity on proton decay p → ν K + searches*

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this study, the potential of searching for proton decay in the $p\to \bar{\nu} K^+$ mode with JUNO is investigated. The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits suppression of the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar{\nu} K^+$ is 36.9% ± 4.9% with a background level of $0.2\pm 0.05({\rm syst})\pm$$0.2({\rm stat})$ events after 10 years of data collection. The estimated sensitivity based on 200 kton-years of exposure is $9.6 \times 10^{33}$ years, which is competitive with the current best limits on the proton lifetime in this channel and complements the use of different detection technologies