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研究以140份东北地区粳稻品种(系)为材料,分别对芽期、分蘖期、孕穗期、灌浆成熟期的耐冷性进行鉴定。结果表明,140份材料中,芽期强耐冷性材料有3份,分蘖期耐冷性较好的占20.00%,孕穗期耐冷性较好的占64.28%,成熟期耐冷性较好的占44.42%;对各生育期耐冷性进行相关分析,结果表明分蘖期地上部分生长量与芽期死苗率和孕穗期结实率呈显著或极显著正相关,孕穗期耐冷性与成熟期耐冷性呈极显著正相关。死苗率可作为分蘖期和孕穗期耐冷性鉴定的间接指标;分蘖期耐冷性可作为孕穗期耐冷性的间接指标。 相似文献
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周新桥 《湖南农业大学学报(自然科学版)》2013,39(1):7-12
2009年早、晚季用PGV–36人工气候箱对华南籼稻新品种“合美占”、“黄丝占”、“粤广丝苗”和三系法杂交稻组合“天优312”、“天优390”于幼穗分化5~6期、始穗期、开花期和灌浆初期进行了低温胁迫研究。结果显示:①幼穗分化5~6期、始穗期和开花期,低温胁迫会导致华南籼稻新品种(组合)植株高度降低,单穗产量及结实率下降。②幼穗分化5~6期低温胁迫会导致水稻穗长缩短,每穗总粒数减少,而其他3个时期的每穗总粒数不会受低温胁迫影响;幼穗分化5~6期低温胁迫会导致穗下第三节间长度极显著缩短,始穗期和开花期低温胁迫则导致穗下第二、第一节间长度缩短;始穗期和开花期低温胁迫会导致稻穗包颈或包颈加剧,幼穗分化5~6期则无此现象发生。③处于不同生育时期的水稻遭遇低温胁迫,其耐冷能力不同,其差异达到极显著水平,耐冷能力大小依次为灌浆初期、开花期、始穗期、幼穗分化5~6期。同一品种(组合)在不同生育时期的耐冷能力不同:天优390在幼穗分化5~6期、灌浆初期耐冷能力最强,但在始穗、开花期较弱;粤广丝苗在始穗期、开花期耐冷能力最强,但在幼穗分化5~6期较弱。 相似文献
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水稻耐冷性研究Ⅱ.云南稻种资源耐冷性鉴定 总被引:14,自引:1,他引:14
本文是系列论文水稻耐冷性研究的第二部分,从云南稻种资源芽期耐冷性鉴定、苗期耐冷性鉴定、孕穗开花期耐冷性鉴定3个方面系统地阐述了研究结果。早红谷、紫糯、攀农1号、马登红谷、澜沧花糯、攀天阁黑谷、宁Lang托托谷和海排谷等是芽期强耐冷性资源,芽期耐冷性存在稻种类型间差异。黑选5号、马登红谷、鲁甸黑谷、龙树红谷、七河大红谷、凤仪小白谷、小白谷、背子糯和细黄糯等是苗期耐冷性极强资源。黑选5号、海排谷、勐谢早红谷、石屏冷水谷、丽江新团黑谷、永宁小灰谷、昆明小白谷、半节芒、合系10号和云冷3-2等是孕穗开花期耐冷性资源。马登红谷等具有芽期和苗期耐冷性,澜沧花糯和攀天阁黑谷等具有芽期和孕穗开花期耐冷性,凤仪小白谷和龙树红谷等资源具有苗期和孕穗开花期耐冷性。 相似文献
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不同生态条件下稻种耐冷性经济性状的遗传研究 总被引:2,自引:2,他引:2
用5个不同耐冷级别品种按1/2P(P-1)配制15个组合及其亲本在籼稻区,籼粳交错区和温凉粳稻区进行云南稻种不同世代主要经济性状的遗传研究,结果表明:(1)不同稻作区亲本品种及其杂交组合主要经济性状及其一般配合力(GCA)、特殊配合力(SCA)存在明显差异,因基本型和生态条件呈现一定的规律性变化。(2)亲本品种及其组合随海拔升高,株高,穗长,每穗实粒数和颖花数有增大的趋势,但结实率则相反;杂种后代 相似文献
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对8个水稻品种(系)3个时期耐冷性情况进行比较结果表明:空育131和龙粳20总体耐冷性较强,垦粳1号、垦稻17和龙育03-1804耐冷性差异不明显。 相似文献
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为提高寒地水稻推广品种抵御低温冷害的能力,保证寒地水稻的安全生产,为新品系的提升或停试提供科学依据,开展了本项研究。研究采用减数分裂期恒温深冷水串灌方法和人工气候箱低温法,鉴定了黑龙江省水稻区域试验新品系孕穗期障碍型冷害抗性。2004—2005年共鉴定区域试验新品系45份次,审定推广4个水稻新品种,这些新品种生产表现良好。同时,阐明了寒地水稻抗冷性鉴定的必要性及应该予以考虑的问题,并对寒地水稻抗冷性育种提出了广泛引入抗冷性基因源,开展国际合作;早世代选择,跟踪鉴定;多种方法相结合,选育抗冷新品种等建议。 相似文献
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Identification of Cold Tolerance of Rice Germplasm Resource at Germinating Stage in Cold Region 总被引:2,自引:0,他引:2
Total 75 rice varieties (lines) in Heilongjiang Province (or cold region) as germplasm resources were identified for cold tolerance at germinating stage by controlling temperature in artificial incubator. The results showed that the shooting seed rate at the germinating stage could be used as the evaluation index of cold tolerance. The cold tolerance was recorded on 1-9 scale and could be identified by the criteria of five indexes such as highly tolerant (HT), tolerant (T), moderately tolerant (MT), susceptible (S), highly susceptible (HS). 相似文献
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Study on Difference in Cold Tolerance Between Weedy Rice and Cultivated Rice in Heilongjiang Province of China 总被引:1,自引:0,他引:1
A long-red awn weedy rice and rice cultivars named Ken99004(ZCI), Crossing-503(ZC2), Ken Sticky Rice(ZC3), Shashani(ZC4), Long-Grain Aromatic Rice(ZC5) were used to study typical wild traits of weedy rice and to identify the cold resistance of all genotypes. The results showed that the stem of long-red awn weedy rice was the weakest. No difference was found in the early stage of rice growth, e.g. the vegetable growth stage, between long-red awn weedy rice and other rice cultivars in the stem rigidity, but in the later stage, or reproductive growth stage, their leaves and stems were senescent rapidly because of the speedy supply of nutrients for panicle growth, meanwhile the rigidity of stem was reduced sharply just as withered weeds. The germination rate of long- red awn weedy rice was the highest in cold condition, and in turn were ZCI, ZC2, ZC3, ZC4, ZC5, respectively. The performances of genotypes in cold tolerance were identical, those with a high ability of germination in low temperature also showed a strong cold tolerance in main traits in whole growth period, the order from strong to weak in the extent of cold tolerance were long-red awn weedy rice, ZCl, ZC2, ZC3, ZC4, ZC5, respectively 相似文献
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对河北省地方水(陆)稻品种耐逆性进行了鉴定,并在此基础上分析了耐寒性、耐旱性、耐盐性种质分布情况。对耐性频度较高的耐寒性、耐旱性从水、陆稻,熟期,不同稻作区等方面进行了详细研究。结果表明:耐寒、耐旱品种频度高、强度大,耐寒品种高达86.44%,高耐率23.53%;耐旱品种为48.77%,高耐率31.65%;耐盐性品种仅为6.46%,并且无高耐性和耐性品种。耐寒品种频度水稻高于陆稻,各熟期类型分布频度接近,随纬度增加、经度西移和温热条件降低而增加;耐旱性品种频度和强度均是陆稻高于水稻,早稻早熟耐性频度最高,其余熟期比较接近,河北省东北地区高,西北及冀中库淀地区低。 相似文献
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东乡野生稻耐冷性研究进展 总被引:20,自引:0,他引:20
对东乡野生稻耐冷性方面的研究进展作了综述,主要内容包括水稻冷害和东乡野生稻耐冷性的鉴定、遗传分析、利用等。并对今后东乡野生稻的研究利用提出了几点建议。 相似文献
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[目的]研究普通卷甲虫的抗寒性,为进一步预测下一年虫口发生提供参考资料。[方法]对2000只普通卷甲虫的体长、体宽、鲜重等生物学特征进行了测定,并对每一个体进行了不同低温强度及持续时间的冷冻培养。[结果]在低温条件下,卷甲虫的死亡率与培养温度和培养时间,以及在相同条件下雌、雄虫死亡率之间都具有明显的相关性,呈直线回归关系;一定的低温条件下,培养时间愈长,死亡率越高;在一定的培养时间下随着低温强度加大,死亡率明显升高。但在不同的培养条件下,卷甲虫的死亡率与它们的体长、体重都无明显相关性。[结论]普通卷甲虫的抗寒性与该地区年最低气温的变化相关联。 相似文献
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QIAO Yong-li HAN Long-zhi An Yong-ping ZHANG Yuan-yuan CAO Gui-lan KOH Hee-jong 《中国农业科学(英文版)》2004,3(11)
The quantitative trait loci (QTLs) for cold tolerance at the budburst period (CTBP) was identified using a F2:3 population including 200 lines derived from a cross of indica and japonica Milyang23/Jilengl. A molecular linkage map of 97 SSR markers was constructed using interval mapping and covered a total length of 1 357.3 cM with an average distance of 13.99cM, between adjacent markers in rice genome. The CTBP of F3 lines was evaluated at 5℃, and the survival seedling rate after treating under low temperature at the budburst period was used as cold tolerance index for CTBP. A continuous distribution near to normal for CTBP was observed in F3 lines, CTBP is a quantitative trait which was controlled by some genes. Three QTLs on chromosomes 2, 4 and 7 which are associated with CTBP were detected on location of RM6-RM240, RM273-RM303, RM214-RMll, respectively,which explained the range of the observed phenotypic variance from 11.5 to 20.5%. qCTBP4detected on RM273-RM303 of chromosome 4 explained 20.5% of the observed phenotypic variance. The effect of qCTBP4's allelic gene comes from Jileng 1. 相似文献
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东乡野生稻耐冷性的遗传改良初步研究 总被引:22,自引:1,他引:21
以强耐冷异种质资源--东乡野生稻为骨干亲本,采用“双重”低温加压筛选法对粳稻耐冷性进行遗入良,取得了良好效果,育成的4913-1粳稻品种(品系)其耐冷水平,在苗期(二叶一心)冰箱0℃处理48h,完好无损,在南昌自然条件下越冬再生3年,通过生产示范,产量,品质和抗性都得到了较理想的效果。并且育成了粳型三系不育系和两用系不育系,可以在南昌越冬,可望实现杂种优势固定大面积应用于生产。 相似文献
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