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通过单株选择、成对杂交、隔离区(网)株系圃选择产生U 33A原原种,再隔离繁殖产生原种,原种隔离繁殖产生不育系大田用种;通过单株选择套袋自交、隔离区株系选择产生恢复系X 6-1原原种,再繁殖产生原种;杂交种生产可利用自然的森林、河道、道路、房屋等进行隔离,开阔地带隔离距离800m以上,同时父本早播,使父本充分利用冬前的光温资源进行营养生长,形成强壮的父本植株,能提供更多的花粉,父本在9月5—10日播种,母本9月12—16日播种。繁殖和制种中按照国家相关标准进行质量检验,亲本原种种子质量标准为:纯度≥99%,净度≥98%,发芽率≥90%,水分≤9%,硫甙含量≤20μmol/g(饼),芥酸含量≤0.5%;亲本大田用种质量标准为:纯度≥98%,净度≥98%,发芽率≥90%,水分≤9%;杂交种质量标准为:纯度≥90%,净度≥98%,发芽率≥85%,水分≤8%。 相似文献
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以自育的甘蓝型油菜双低细胞核隐性核不育材料98-116 A为母本与甘蓝型油菜凸耳双低品系T2632为杂交父本进行杂交转育,在F1可育株自交的同时进行去雄与杂交父本进行正反交,在杂交后代中选取生长健壮具有凸耳性状的可育株自交,并调查自交后代中的育性分离比例,自交4个世代后进行兄妹交,即获得双低的凸耳甘蓝型油菜隐性细胞核雄性不育系,该不育系的不育株率远高于98-116 A,其不育株率达到90%以上,而且其育性遗传恢复机理也发生了改变.该不育系在油菜隐性核不育两系杂优育种的研究与利用中具有重大的研究价值和应用前景. 相似文献
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根据2003～2007年黔油17号不育系母本98-116A与父本恢复系ZW004间的单株成对杂交组合在遵义三合的田间鉴定结果以及近年来在贵州各点的试验示范结果,对黔油17号的产量性状和最大增产潜力进行分析评价。黔油17号的单株成对杂交的鉴定组合都具有206.77～387.50kg/667m2的生产能力和产量水平,所有鉴定组合的平均产量达到281.89kg/667m2。近年来黔油17号在贵州油菜主要产区试验示范的产量水平在216.21～326.81kg/667m2之间,因此黔油17号在贵州油菜生产上具有达到300kg/667m2以上的生产潜力。 相似文献
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优质油菜恒禾油 998 及其高产栽培技术 总被引：1，自引：0，他引：1
恒禾油998系内江市农业科学院油菜课题组用自育双低隐性核不育内油11-83AB作母本、优质恢复系11-603R作父本组配而成的甘蓝型核两系优质双低杂交油菜品种,于2018年通过农业农村部登记,登记编号GPD油菜(2018)510080。介绍了恒禾油998的选育过程和主要特征特性,阐述了其在区域试验中的栽培表现,并总结其高产优质栽培技术。 相似文献
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优质甘蓝型杂交油菜新品种黔油19号的选育 总被引：1，自引：0，他引：1
用甘蓝型油菜细胞核隐性雄性不育系98-116A与抗逆性强的双低恢复材料ZW 20-4测配，通过单株成对测交筛选鉴定出强优势组合黔杂2002-4，于2006年通过贵州省农作物品种审定委员会审定，定名为黔油19号。该组合在2003～2005年的贵州省油菜新品种区域试验产量为150．42kg／667m^2。较对照油研7号（两年平均142、18kg／667m^2）平均增产5．8％。该品种菜籽芥酸含量1．4％，含油量39．93％，硫苷含量37．29μmol／g。黔油19号具有高产、稳产、优质、适应性强等优点。 相似文献
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为提高番茄的优势组合的选配概率,对番茄6个亲本和30个杂交组合果实中4个品质性状的配合力及遗传力进行研究。试验采用6个性状不同的番茄材料作为亲本（编号分别为42、43、44、50、63、69）,按照Griffing完全双列杂交(p2),配成30个杂交组合。对供试亲本的果实厚度、果实硬度、维生素C和总糖的F测验值做差异性分析,发现各性状均达到显著或极显著水平,可以得出所选择的亲本在果实厚度、果实硬度、维生素C和总糖几个性状中的差异有统计学意义。根据各亲本4个品质性状的一般配合力效应值和特殊配合力效应值的表现,可以得出亲本43的总糖和果实硬度的一般配合力最高或较高,分别为0.1557、0.0917,亲本69的番茄维生素C的一般配合力效应值最高,为80.8132。在选育优良品质性状综合表现中,组合50×43在4个品质性状的特殊配合力均较高,是较好的选育品种。 相似文献
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番茄果实主要品质性状的配合力及遗传力分析 总被引：2，自引：1，他引：1
为了给番茄的品质育种提供理论依据,采用多年来的高自交、纯合的6个性状不同的番茄材料(42、43、44、50、63、69)作为亲本,按照Griffing完全双列杂交(p2),配制成30个杂交组合。并分析了番茄6个亲本和30个杂交组合果实5个品质性状的配合力及遗传力。结果表明：亲本43的番茄红素、糖酸比、可溶性固形物等性状的一般配合力效应值都最高或较高,说明亲本43是个在选育风味品质和营养品质方面理想的亲本材料;亲本42的番茄果重的一般配合力效应值最高,亲本42可作为培育外观品质优良的番茄的理想材料;组合50×43在各品质性状的特殊配合力均比较高,它可以作为选育优良性状综合比较好品种。 相似文献
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标记型柱头外露种质系与陆地棉亲本间杂种优势与配合力分析 总被引：12，自引：1，他引：11
采用ＮＣⅡ遗传交配设计,对５份标记型柱头外露种质系和３份陆地棉亲本交配后,杂种Ｆ１的１１个性状的杂种优势和配合力进行了分析。结果表明,主要产量性状霜前皮棉产量,超高优势的幅度为－２８．８８％～１３．１７％,平均为－３．０６％,６个组合具正向的杂种优势;中亲优势的幅度为１８．１４％～８０．１２％,平均为５３．０８％,１５个组合均具有正向的中亲优势;竞争优势的幅度为－１５．３２％～４６．４３％,平均为１１．２７％,１０个组合具有正向的竞争优势。其它产量性状中单株铃数的杂种优势最为明显。纤维品质性状,２．５％跨长和比强度的优势明显,麦克隆值的负向优势明显。高亲值、中亲值和低亲值与Ｆ１平均值的相关关系表明,多数产量性状Ｆ１代平均值与高亲值相关性密切,因此在组合筛选时应注意对常规亲本的选择。配合力上,ＧＣＡ效应显著的性状,中棉所１９和石３２１分别在产量、品质性状方面表现较优,９６－１、９６－６７、９６－３３等３份标记型柱头外露种质系表现较优;ＳＣＡ效应显著的８个性状中,Ａ１Ｂ２８个性状的ＳＣＡ效应值均为正,Ａ２Ｂ２和Ａ４Ｂ１均有７个性状的ＳＣＡ效应为正。文中对标记型柱头外露种质及亲本选配等问题进行了讨论。 相似文献
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糯高粱新选不育系的配合力及遗传力分析 总被引：2，自引：1，他引：1
为了筛选出遗传力和配合力表现优良的糯高粱不育系亲本,提高杂交育种效率,为杂交糯高粱育种选择优良亲本和配置强优势组合提供参考。选用3个糯高粱新选不育系、3个恢复系,按不完全双列杂交法组配9个杂交组合,采用DPS数据处理软件对株高、穗长、穗粒重、生育期、千粒重、产量6个主要农艺性状进行配合力及遗传效应的分析。结果表明,不育系11476A2在株高、穗长和生育期的一般配合力均有较高的优势,相对效应值分别为2.5572、2.4284和0.6792;不育系11494A2的穗粒重和产量一般配合力最高,相对效应值为5.7165和4.8505。这些亲本系在育种和生产上具有很高的利用价值。加性方差与基因型方差的比值依次顺序为株高>穗粒重>千粒重>产量>穗长>生育期。从产量性状分析看,11476A2×L17可能是一个较理想的组合模式。 相似文献
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A diallel analysis to identify parental lines and specific crosses through combining ability estimation was undertaken in a set of seven rice varieties. G riffing's Method I, Model I was employed for this purpose. The seven parents and 42 F1 s (including reciprocals) were grown in a randomized block design with four replications. Data were collected on 16 characters including a few root characters for which requisite number of plants were grown (in RBD design) in pot culture.
GCA and SCA variances were significant for all the characters. Reciprocal effects were also significant except for rachilla/panicle and grain length. An early flowering NC 1281 Mutant and Taichung Native 1: bold grain mutant were good general combiners for majority of characters. The crosses with high specific combining ability generally involved high × low general combiners. The cross Nira × T-N-1: bold grain mutant recorded best SCA effects for grain yield as well as all the important yield attributes and also for major root characters. In fact, in most of the high SCA registering crosses for various characters, Taichung Native 1: bold grain mutant or Nira was one of the parents commonly involved. 相似文献
GCA and SCA variances were significant for all the characters. Reciprocal effects were also significant except for rachilla/panicle and grain length. An early flowering NC 1281 Mutant and Taichung Native 1: bold grain mutant were good general combiners for majority of characters. The crosses with high specific combining ability generally involved high × low general combiners. The cross Nira × T-N-1: bold grain mutant recorded best SCA effects for grain yield as well as all the important yield attributes and also for major root characters. In fact, in most of the high SCA registering crosses for various characters, Taichung Native 1: bold grain mutant or Nira was one of the parents commonly involved. 相似文献
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为了分析转基因抗虫棉不育系的配合力和杂种优势。采用6×6NCⅡ交配设计,分析了6份转基因抗虫核不育系与6份陆地棉亲本杂交后,9个性状杂种F1的超父本优势、竞争优势和配合力。结果表明,籽棉产量超父本优势的平均值为19.44%,22个组合具正向的杂种优势;竞争优势的平均值为-8.36%,16个组合出现正向竞争优势。单株铃数的杂种优势最为明显。父本值与F1平均值的相关关系表明,8个性状F1代平均值与父本值的相关性达到极显著水平。经配合力分析,A1、A4、B1、B5等亲本的GCA较好;SCA效应显著的6个性状中,A1×B6、A3×B3等组合的SCA效应均为正值。 相似文献
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Effects of cytoplasm on heterosis and combining ability for agronomic traits in rice (Oryza sativa L.) 总被引：1，自引：0，他引：1
Summary Effect of sterilizing (WA) cytoplasm on heterosis and combining ability for days to flowering, plant height and grain yield in rice was studied in 70 crosses and their reciprocals produced by 10 cytoplasmic male sterile (A), their maintainer (B) and seven restorer (R) lines following line x tester design. The materials consisting of 140 hybrids (70 A/R and their reciprocal 70 R/B) plus 17 parental lines (10 B + 7 R) were evaluated under six environments, created by growing in three fields with different fertilizer doses (0, 60, 120 kg N/ha) and 2 seasons (dry and wet) during 1986 at IRRI farm. Reciprocal cross effect (A/R vs R/B) were highly significant for all the three traits. Interaction of reciprocal cross effects with environments were also highly significant for yield and days to flowering. Cytoplasmic effect for yield, days to flowering and plant height were estimated by comparing A/R and R/B combination and testing the significance of difference with LSD value. In order to avoid confounding effect of spikelet sterility on yields, twenty crosses showing normal spikelet fertility were selected. Both positive and negative cytoplasmic effects were observed for the three traits. The effects were modified by environments, except for plant height. Heterosis for all three traits was also affected by cytoplasm, however, manifestation of cytoplasmic effects was higher for heterosis for days to flower than in heterosis for yield and plant height. Effect of cytoplasm was more pronounced on general combining ability effects of parents than specific combining ability effects of crosses. Among the parents two CMS lines A4 (IR54752A) and A8 (IR22107-113-3-3A) and two R lines: R2 (IR46) and R7 (IR9761-19-1) showed consistent positive effect of cytoplasm on general combining ability. These lines have given several good heterotic combinations. The study indicated the usefulness of evaluating diverse cytoplasmic sources in various nuclear genotypes bred for hybrid rice breeding program. 相似文献