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1.
水稻广亲和广谱型恢复系SWR78的选育   总被引:2,自引:0,他引:2  
利用野败(WA)型、红莲(HL)型、包台(BT型)3种细胞质的同核异质粳稻广亲和不育系苏秋A与19个籼、粳恢复系测交,筛选出对以上3种细胞质不育系均具正常恢复力的广谱型恢复系6078。通过回交,将广亲和品种Lemont的广亲和基因导入6078,育成广亲和广谱型恢复系SWR78。经测交鉴定,SWR78对WA型、印水(ID)型、HL型、BT型4种细胞质的10个籼、粳不育系均具正常恢复力。  相似文献   

2.
阐明粳稻细胞质雄性不育系开花习性与异交率之间的关系,是选育高异交率粳稻不育系的重要基础。在对284份滇一型粳稻细胞质雄性不育系的自然异交率检测和部分不育系开花性状观测的基础上,通过相关分析和开花习性的精细比较,发现粳稻不育系间自然异交结实率变化幅度较大,大多数粳稻不育系的自然异交率都比较低,但同时也鉴定出少量高异交率的不育系。相关分析发现颖花的开颖角度与粳稻不育系的自然异交结实率呈显著正相关。通过对3个不育系开花性状的精细观察分析,显示了开花集中度是影响粳稻不育系异交率的重要因素。在粳稻不育系的育种实践中应该加大对不育系开颖角度和开花集中度的选择,以提高粳稻不育系的异交结实率。  相似文献   

3.
粳稻恢复系宁恢3-2育性恢复力的遗传   总被引:6,自引:1,他引:5  
两套粳稻雄性不育系(A)及其保持系(B)分别与宁恢3-2(R)杂交、回交、自交、获得两个组合的 F_1(A/R)、B_2(A//A/R)、B_2′(A//B/R)、F_2和 F_3,以花粉育性和种子育性作为恢复度指标,研究宁恢3-2育性恢复力的遗传。 结果表明,BT 六千辛 A 和 L 平壤3号 A的花粉以染败为主,在光学显微镜下不易区分分离世代植株中可育和不育花粉,  相似文献   

4.
两套粳稻雄性不育系(A)及其保持系(B)分别与宁恢3-2(R)杂交、回交、自交、获得两个组合的 F_1(A/R)、B_2(A//A/R)、B_2′(A//B/R)、F_2和 F_3,以花粉育性和种子育性作为恢复度指标,研究宁恢3-2育性恢复力的遗传。 结果表明,BT 六千辛 A 和 L 平壤3号 A的花粉以染败为主,在光学显微镜下不易区分分离世代植株中可育和不育花粉,故不宜用花粉育性作为恢复度指标进行遗传分析。以种子育性为指标,发现两个不育系是配子体不育类型,宁恢3-2对它们的育性恢复力是由一对显性恢复基因控制的。  相似文献   

5.
为了挖掘和利用K型、F型小麦雄性不育系,本研究采用I_2-KI染色法观察花粉败育类型,并以不育系为母本与583个优良小麦品种(系)为父本进行杂交,调查F_1自交结实率,筛选其强恢复系和保持系,以期为杂交小麦育种提供理论支撑。结果表明,K型、F型不育系花粉败育率达96.97%、97.73%,花粉败育类型以染败、典败为主。K型和F型不育系的自交结实率(国内法)分别为4.61%、1.98%。F_1的自交结实率(国际法)在100%以上共有34个,20%以下共有11个。‘良星805’、AQ001、‘临7287’、‘济麦22’是K型不育系的优良恢复系;‘宝8696’、‘农大3291’、‘科1201’、‘冀8906069’可用于转育新型K型不育系;‘宝8696’、‘15展24’、‘洛麦23’、‘临远801’是F型不育系的优良恢复系;‘15展11’、‘汶航6号’、‘林育5号’、‘丰优8号’可用于转育新型F型不育系。以上结果说明,K型和F型不育系花粉均败育彻底、稳定,易找到优良恢复系,且后者更易恢复。  相似文献   

6.
1988年至1990年采用控制授粉株系循环法对BT型六千辛A、六千辛B和恢复系77302—1进行了提纯,排除了不育系群体中的同质恢和保持系群体中的恢复基因以及恢复系群体中的杂株,使不育系纯度达99.96%,保持系和恢复系纯度均达100%。利用此法能以较少投入生产大量原种。现已在江苏省泗洪县建成了我国南方最大的杂交粳稻种子生产基地。  相似文献   

7.
水稻广亲和品种对不同细胞质不育系恢复力的鉴定研究   总被引:11,自引:1,他引:10  
汤述翥  李国生 《作物学报》1999,25(2):137-144
选用BT型、HL型和WA型3种细胞质的不育系及相应保持系对16个广亲和品种的恢复力 进行测交鉴定,结果表明:(1)在同一细胞核背景下,BT型细胞质的可恢复性好于HL型细胞质,HL型细胞质又好于WA型细胞质。在同一不育细胞质背景下,釉稻不育系较粳稻不育系易恢复。(2)不同广亲和品种的恢复能力有较大差异:培矮64、培C311、轮回422  相似文献   

8.
野生稻(O.rufipogon)新胞质改良不育系稻米品质的研究   总被引:11,自引:2,他引:9  
王乃元 《作物学报》2006,32(2):253-259
通过核置换回交,获得一种普通野生稻(O. rufipogon)雄性不育细胞质,称为FA细胞质,育成新质源不育系金农1A。研究表明,FA细胞质不育系与WA和HL不育系的恢保关系不同,野败型的保持系和恢复系、红莲型的保持系和恢复系都可以作为FA细胞质的保持系,而不能成为FA细胞质的恢复系。这是一种新发掘的水稻雄性不育细胞质源。FA细胞质突破了WA和HL细胞质恢保关系的遗传局限,扩大了保持系育种范围,可以用品质优良的栽培品种培育成优质稻米不育系。新质源不育系金农1A不育度高,不育性稳定,农艺性状优良,抗稻瘟病和白叶枯病,开花时间早,稻米12项品质指标全部达到农业部颁发的优质米一级或二级标准,实质性地提高了不育系的稻米品质和综合水平,为培育优质米杂交稻奠定良好的遗传基础。  相似文献   

9.
T461是以籼粳中间型品种轮回422为广亲和、野败恢复基因供体,与意大利粳稻Cripto杂交选育成的具有良好一般配合力、广谱广亲和的偏粳型恢复系。T461能恢野败、矮败、印尼水田谷、滇型和BT型等核-质互作型籼、粳三系不育系,与籼型和粳型测验种杂交的结实率非常接近,小穗育性平均在90%以上,表现亲和力强、亲和谱广。在T461的改良过程中,选用多个不同的三系不育系在分离世代检测恢复性和配合力的同时,还能起到鉴定广亲和性的作用,达到获得广谱广亲和的目的。  相似文献   

10.
《种子》2014,(11)
以新选育的转绿型新叶黄化标记不育系热农1 A和对照品种丰源及博A为试验材料,在海南自然条件下对比研究热农1 A与对照不育系的主要农艺性状、开花习性和异交特性。结果表明,热农1 A全生育期新生叶片黄化,随后由黄转绿,对照品种叶片均表现绿色;热农1 A株高、生育期、主茎叶片数、分蘖能力、单株有效穗数和穗长都与对照不育系相差不大,每穗着粒数较对照多,具有较好的产量潜力。育性方面,热农1 A与对照不育系一样,败育彻底,以典败花粉为主,套袋自交不育株率100%。开花习性方面,热农1 A单穗逐日开花动态表现为盛花期内的开花率高,开花高峰早而集中,单穗日开花动态表明热农1 A具有单日开花高峰持续时间长的特点。从柱头外露、包颈粒率、不闭颖率和柱头活力4个指标来看,热农1 A总外露率和双边外露率高,包颈粒率和不闭颖率低,柱头活力下降较平缓,与对照相比,在异交特性上具有优势。  相似文献   

11.
水稻育性恢复基因Rf-1是目前水稻上克隆的唯一恢复基因.通过位于Rf-1位点的两个特异性CAPS(cleavable amplified polymorphic sequences)标记对滇I型、野败型、红莲型及BT型恢复系基因型分析,发现这四种不同胞质的恢复系在Rf-1位点具有相同的带型,滇I型的两个保持系具有不同的带型.结果表明这四种不同胞质系统的恢复系均具有Rf-1基因.该结论与从恢复系选育的系谱分析的结果相一致的.  相似文献   

12.
Search for male sterility-inducing cytoplasm in wild species of the genus Oryza was attempted with a view to diversify the base of the cytoplasmic genetic male sterility system currently used in the development of commercial rice hybrids. A total of 132 interspecific crosses were made involving accessions of four wild and two cultivated species, all belonging to the A genome. Wild accessions possessing sterility-inducing cytoplasms were identified following reciprocal and sterile F2 backcross methods. Sterile segregants were pursued through substitution backcrosses to develop cytoplasmic male-sterile (CMS) lines. CMS lines were developed with the cytoplasm of either O. rufipogon (VNI) or O. nivara (DRW 21018, DRW 21001, DRW 21039, DRW 21030 and RPW 21111). Based on shape, staining, and abortive pattern of pollen and also on type of interaction with a set of restorers and maintainers for known cytoplasmic male steriles of WA source (V 20A), the newly-developed CMS lines were grouped into four classes. Of these, RPMS 1 and RPMS 2 showed gametophytic male sterility with a restorer reaction different from WA cytoplasmic male-sterile stocks.  相似文献   

13.
Cytoplasmic male sterility (CMS) hybrid rice has made a great contribution to the increase of rice yield globally. To facilitate the development of high‐quality pairs of the wild abortive (WA) male sterile and maintainer lines, the genetic basis of fertility restoration of WA‐CMS and stigma exsertion was investigated in this study using a testcross population with the WA‐CMS background. Seed‐setting rate and stigma exsertion rate were used as the indicators of the two traits, respectively. Results showed that four minor QTL regions from 9311 were responsible for the variation of seed‐setting rate, while a few minor QTLs and epistatic QTL pairs influenced stigma exsertion rate. These results would be of great use in the development of high‐quality pairs of WA male sterile and maintainer lines in rice.  相似文献   

14.
Twenty‐seven improved aromatic lines of germplasm and 18 non‐aromatic disease‐resistant genotypes of rice were test‐crossed with four cytoplasmic male‐sterile lines (IR 58025A, IR 62829A, PMS 3A and PMS 10A). Thirteen aromatic and 10 non‐aromatic genotypes were selected based on pollen fertility, and crosses were repeated to confirm sterility‐maintaining and fertility‐restoring ability. Genotypes were categorized as effective restorers (> 80% spikelet fertility), partial restorers (21‐79% spikelet fertility) and maintainers (< 1% spikelet fertility). The effective basmati restorers identified were Basmati 385, Chandan, P1031‐8‐5‐1, HKR 241‐IET‐12020, SAF Khalsa 7 and Karnal Local. The basmati maintainers identified were Basmati 370, Pusa basmati 1, P615‐K‐167‐13 and P1173‐4‐1. The frequency of restorers obtained was higher for the non‐aromatic than the aromatic basmati type. The performance of restorers varied with cytoplasmic male‐sterile (CMS) line, location and season of testing. The differential ability to restore fertility in the CMS lines that have the wild abortive (WA) cytosterile system could result from different nuclear backgrounds of the CMS lines. These restorers and maintainers possess acceptable grain dimensions, a desirable degree of aroma, volume expansion through linear kernel elongation and cooking quality characteristics of basmati rice. These genotypes will contribute to developing basmati hybrids and provide restorers and maintainers with acceptable key basmati quality characteristics.  相似文献   

15.
用BT型、红莲型、印水型、野败型4种胞质的粳稻不育系六千辛A及相应的保持系六千辛B分别与8个粳型恢复系和12个籼型恢复系配成的100个组合对4种细胞质的遗传效应进行分析。结果表明:不育细胞质对粳籼杂种F1的株高、每穗总粒数和播抽历期有显著的平均负效应,对穗长、单株有效穗的平均负效应不显著;不育细胞质对粳粳杂种F1的5个性状没有显著遗传效应。对于粳籼杂种F1的5个性状,4种胞质之间遗传效应存在极显著差异;对于粳粳杂种F1的每穗总粒数、株高、播抽历期,4种胞质之间遗传效应差异极显著。根据4种胞质平均相对效应秩次总和排序,无论是粳籼还是粳粳杂种F1,都是印水型细胞质最好。  相似文献   

16.
广亲和粳稻恢复系选育方法   总被引:1,自引:0,他引:1  
滕利生  申宗坦 《作物学报》1995,21(4):391-395
广亲和粳稻恢复系的选育除采用WA型恢复与广亲和粳稻杂交选育和不同广亲和恢复系间杂交选育外,本研究提出以粳稻为父本杂交选育的4种办法:1、以型杂交稻F1为母本转育同质广亲和恢复系;2、以WA型下育系为母本筛选同质广亲和恢复系;3、以WA型广亲和不育系为母本,筛选同质广亲和恢复系;4、以同质广亲和恢复系为母本转育新的恢复系。用上述方法已育成02428等广亲和恢复系,并可同时恢复WA型和BT型胞质不育系  相似文献   

17.
王建军  申宗坦 《种子》1994,(1):14-16,20
Bellemont,CB-801,3264,浙湖114与籼,粳稻杂交亲和性比较表明:Bellemont,CB-801表现出广谱,偏籼型的亲和性,基中Bellemont亲和性优于CB-801。它们均不携带不育胞质的恢复基因,综合考虑株型,开花散粉习性,其更适宜 于转充和不育系;3264,浙湖114为窄谱,偏粳型广亲和品种,它闪对粳稻BT型不育胞质具有恢复能力,可以作为转育广亲和恢复系的基础材料。系谱  相似文献   

18.
Yang Zhuping 《Euphytica》1997,95(3):253-258
Following anther culture of various F1 hybrids of indica restorer (R) lines/wide compatible varieties (WCVs) and japonica R lines/WCVs, the homozygous diploid plants (2n) generated were test-crossed with indica WA type cytoplasmic-genetic male sterile (CMS) line Zhanshan 97A (WA), indica testers Nanjing 11 and Nante, japonica BT CMS line Hanfeng A (BT), and japonica testers Balilla and Akihikari to identify widely compatible restorer lines. The results of this study showed that among the diploid pollen plants generated from F1 hybrids of indica R lines/WCVs, 36.7% and 64.7% possessed normal fertility restoration ability (rate of seed-setting > 80%) to Hanfeng A and Zhanshan 97A, respectively. 71.3% and 32.3% had normal fertility restoration ability to Hanfeng A and Zhanshan 97A, respectively, in diploid pollen plants derived from the japonica R lines/WCVs F1's anther culture. Several widely compatible R lines were selected from anther culture of F1 hybrids of indica R lines/WCVs and japonica R lines/WCVs. These widely compatible R lines derived from diploid pollen plants showed good wide compatibility and restoration ability both to WA and BT type CMS lines. Strong standard heterosis of major agronomic traits and yield traits was observed in F1 test-crosses of widely compatible R lines with Hanfeng A and Zhanshan 97A. The wide compatibility in widely compatible R lines H17, H158 and H281 was studied by a set of three-way crosses. Segregation of the fertile plants with seed-setting rate > 70% and semi-fertile plants with seed-setting rate > 69.9% agreed with a ratio of 1:1, indicating that wide compatibility in these widely compatible R lines is governed by a pair of major genes. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献   

19.
粳稻三系亲本的性状特征与杂种优势分析   总被引:5,自引:0,他引:5  
收集具有代表性的BT型粳稻不育系、保持系及恢复系各16个,共配制229个杂交粳稻组合,就三系亲本的性状特征、粳稻的杂种优势、不同性状亲子间的相关性进行了研究。结果表明:(1) 恢复系和保持系的潜在库容相近,但恢复系分蘖性较弱、结实率和千粒重较低,单株产量显著低于保持系。恢复系的垩白度显著高于保持系,直链淀粉含量极显著低于保持系。改良外观品质和提高结实率是今后恢复系选育的主要目标。(2) 杂交粳稻普遍存在较强的中亲优势,多数性状的超亲优势不强,但在生长势上则表现非常明显的竞争优势。杂交粳稻大穗优势突出,但结实率多表现负向优势,是目前制约杂交粳稻产量优势发挥的主要限制因素。(3) 杂种的多数性状由不育系和恢复系共同决定,杂种与中亲值的相关性最好。比较而言,抽穗期、穗总粒数等性状与不育系关系较为密切,株高、穗实粒数、结实率、品质性状与恢复系关系较为密切。  相似文献   

20.
以野败型细胞质的水稻雄性不育系珍汕97A及其保持系珍汕97B的总DNA为模板,从100个引物中筛选到OPA12对珍汕97A能扩增出一条1600 bp的特异带.用OPA12扩增野败型细胞质的龙特浦A及其保持系龙特浦B、矮败型细胞质的协青早A及其保持系协青早B、恢复系明恢63、珍汕97A/明恢63的F1和F2个体的总DNA,不育系、F1和F2所有调查个体都有16  相似文献   

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