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利用Ogura CMS不育基因orf138特异标记及细胞核育性恢复基因Rfo的KASP标记,在苗期对6个可育的中国水果萝卜育性基因型进行鉴定。结果表明:6个水果萝卜的细胞质均为正常可育胞质。细胞核育性恢复基因Rfo的基因型在不同单株间存在差异,所鉴定的60个单株中,基因型rfrf、Rfrf、Rf Rf分别占40.0%、33.3%和26.7%。以日本白萝卜品种献夏37为不育源,选择具有rfrf基因型的单株与不育源进行杂交与回交,经过5代的回交及父本自交,获得4个不育率100%、遗传稳定、整齐度高的绿皮绿肉水果萝卜雄性不育系及保持系。利用这些雄性不育系配制杂交组合,获得7个优良的杂交组合。分子标记辅助选育萝卜雄性不育系,避免配制大量杂交组合及田间育性鉴定,提高了选择效率与精准度。 相似文献
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“水师营20”是以不育度和不育率均为100%的细胞质雄性不育系BYN1A为母本,以自交系BYN6为父本杂交而成的大白菜新品种。早熟,在大连地区夏秋季露地栽培生育期52~55 d。植株为直筒型,生长势强,外叶色灰绿,叶柄白绿,株高42 cm,株幅59 cm,叶面微皱,外叶直立。叶球舒心,球高31 cm,球粗17 cm,球形指数1.8。单株净菜质量2.8 kg,单株净球质量1.9 kg,净菜率67%,每667 m2产量约为4 500 kg。抗热,适合大连地区6—7月种植。 相似文献
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以课题组选育的CMS不育系L9A与其保持系L9B为试材,并以L9A为母本,22份优良自交系为父本配制杂交组合,研究分析了不育系和保持系形态性状差异、F1代11个农艺性状和5个品质性状的杂种优势,以期为辣椒育种实践提供参考依据。结果表明:L9A与L9B在株高、株幅、花药长度和花柱长度等方面存在明显差异;在22个辣椒杂交组合中,杂种优势普遍存在。L59、L90、L117等3个父本自交系可以使L9A的育性得到恢复,且其F1代在单株果数、单株产量和单果种子数的正向优势较为明显,同时发现F1代仅在1~2个品质性状上表现出正向杂种优势。相关性和杂种优势指数分析发现,L9A的F1代在果肉厚、株高、株幅、单果质量、可溶性糖含量、可溶性蛋白质含量等方面优势较大;单株产量与单株果数呈极显著正相关,各品质性状之间无显著相关关系。综上,在辣椒育种实践中,通过杂交育种提高辣椒的单株果数或单果质量,从而提高辣椒的单株产量,而利用杂种优势改良辣椒果实品质则存在一定困难。 相似文献
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大白菜显性核复等位基因雄性不育恢复基因Msf的SSR标记 总被引:1,自引:0,他引:1
为筛选大白菜核复等位基因遗传的雄性不育恢复基因Msf的SSR标记,用基因型为MsfMs的雄性不育两用系‘AB01’的可育株自交,得到恢复基因型纯合个体MsfMsf。再用其与基因型为msms的自交系‘a20’杂交和连续回交,获得BC4分离群体。筛选了104对SSR引物,获得3个与雄性不育恢复基因Msf连锁的SSR标记syau_m13、syau_m14和BRMS-040。经群体验证和连锁分析,Msf基因位于R07连锁群上,3个标记位于Msf基因的同一侧,距Msf基因的遗传距离分别为6.7、6.7和8.6 cM。 相似文献
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A novel onion (Allium cepa L.) cytoplasm, cytotype Y, was found in a previous study. Cytotype Y contained unique stoichiometry of coxI and orf725, a candidate gene responsible for male-sterility induction in onions. A S1 segregating population was produced from a single plant selected from PI273626. Although male-fertility segregated in this population, the ratio significantly deviated from single-gene inheritance. However, genotypes of RF31446 marker perfectly linked to Ms locus-controlling fertility restoration completely matched with male-fertility phenotypes, indicating that male-fertility restoration of male-sterility conferred by cytotype Y might be determined by the Ms locus. One plant derived from the S1 population showed discrepancy between male-fertility phenotype and RF31446 genotype. Although the RF31446 genotype was homozygous recessive, reduced amount of pollen grains were observed in anthers. Many pollen grains of the unstable male-sterile plant were deformed. Analysis of 13 molecular markers flanking the Ms locus showed no crossover between the Ms locus and the RF31446 marker. Ten more unstable male-sterile plants were identified from open-pollinated progenies of the unstable male-sterile plant. Viable seeds were successfully produced from unstable male-sterile plants, indicating that pollen grains of the unstable male-sterile plants were partially viable. In addition, an umbel containing unstable male-fertile flowers was identified from one of maintainer lines, although both male and female organs might be sterile in these flowers. 相似文献
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以165份白菜(2n=2x=20)品系中筛选出的11份含2n配子较高的株系为材料,用不同浓度秋水仙素处理花蕾,诱导2n配子;以其为父本,以四倍体雄性不育系为母本进行有性多倍化杂交,从F1中筛选鉴定四倍体。结果表明:用0.20%秋水仙素5~10μL微量注射3mm的二倍体白菜花蕾,处理1次,诱导2n配子效果最好,2n配子频率达20.20%,是未经秋水仙素处理对照的3.63倍。80株杂交F1中,染色体计数显示14株为四倍体(2n=4x=40),占17.5%。与二倍体相比,有性多倍化获得的四倍体在植株形态、气孔、花器官等方面均表现巨大性,气孔密度和结实率降低。 相似文献
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天红5号以雄性不育系HLBcms005为母本,由日本引进的抗抽薹品种经过多代分离提纯后而获得的品系HLBm005为父本,采用
雄性不育三系配套育种技术选育的胡萝卜一代杂种。株高62 cm左右,10片叶,叶丛直立;肉质根根形整齐,表皮光滑,呈圆柱形,
橘红色、颜色深,髓心较细,平均根长14.47 cm,根粗4.06 cm,根质量106.92 g;胡萝卜素含量70.28 mg·kg-1(FW),可溶性固
形物9.11 %,品质好;大棚春播抽薹率0.26 %,较适宜春播。生长期100~105 d(天),每667 m2留苗28 000~30 000株,产量 3 200
kg左右。 相似文献