RESUMEN
A major QTL for grain dormancy, QPhs.ocs-3A.1, derived from the highly dormant wheat Zenkoujikomugi (Zen), has been identified in a study made under a controlled environment. Further investigations were needed to dissect the precise position and expression of QPhs.ocs-3A.1 under different field conditions because the ability to detect genetic loci for grain dormancy traits is compromised by environmental effects and genotype/environment interactions. Group 4 chromosomes have also been shown to be possible sites of QTLs for grain dormancy. The objectives of this study were (1) to locate additional molecular markers in the QPhs.ocs-3A.1 region, (2) to identify QTLs on the group 4 chromosomes and (3) to elucidate their combined effects. We examined the recombinant inbred lines (RILs) from a cross between Chinese Spring (CS) and Zen over a 3-year period in one location and 1 year in a different location. In an interval mapping study QPhs.ocs-3A.1 was mapped to within the 4.6 cM region flanked by Xbarc310 and Xbcd907 at the proximal end of the short arm of chromosome 3A. QPhs.ocs-3A.1 was confirmed to be the predominant dormancy QTL since it explained a large portion (11.6-44.8%) of the phenotypic variation, and was strongly displayed under dormancy-breaking conditions or at low germination temperatures. For QPhs.ocs-4A.1, identified on the long arm of chromosome 4A, and QPhs.ocs-4B.1, on the centromeric region of the long arm of Chr 4B, the LOD peak positions and the desirable allele were consistent between the trials, while the LOD scores and contribution to the phenotypic variation varied. Transgressive segregants were observed among the 125 RILs and most of them had a combination of the three alleles conferring a higher dormancy: the Zen alleles at QPhs.ocs-3A.1 and QPhs.ocs-4A.1 and the CS allele at QPhs.ocs-4B1. This demonstrated a combined effect of the desirable alleles on accelerating grain dormancy, with their total effect being superior to that of Zen.
Asunto(s)
Mapeo Cromosómico , Cromosomas de las Plantas/genética , Fenotipo , Sitios de Carácter Cuantitativo , Semillas/fisiología , Triticum/genética , Marcadores Genéticos/genética , Escala de Lod , Polimorfismo de Longitud del Fragmento de Restricción , Semillas/genética , Especificidad de la EspecieRESUMEN
BACKGROUND: Preoperative diagnosis of cases of renal calculus complicated with papillary renal cell carcinoma (RCC) by image analysis is usually difficult. CASE: A 50-year-old man who had a past history of renal calculus suffered from macrohematuria and abdominal pain for one month was admitted to our hospital. Ultrasonographic examination revealed a 4-cm tumor shadow in the right kidney; it was hypovascular in arteriography. Papillary cell clusters with abundant cytoplasm were found by the cytologic examination of voided urine. Their nuclei were oval and situated eccentrically in the cytoplasm. The nuclear/cytoplasmic ratio was increased. Fine, granular chromatin was distributed evenly, and the nuclear membrane was thin and nearly smooth. Several small nucleoli were evident. All these findings were indicative of a diagnosis of papillary RCC. Histology of nephrectomy specimens confirmed the diagnosis. CONCLUSION: Voided urine cytology can be useful for screening and follow-up of patients with papillary RCC.
Asunto(s)
Carcinoma Papilar/patología , Carcinoma de Células Renales/patología , Cálculos Renales/patología , Neoplasias Renales/patología , Carcinoma Papilar/complicaciones , Carcinoma Papilar/secundario , Carcinoma Papilar/orina , Carcinoma de Células Renales/complicaciones , Carcinoma de Células Renales/secundario , Carcinoma de Células Renales/orina , Humanos , Cálculos Renales/complicaciones , Cálculos Renales/orina , Neoplasias Renales/complicaciones , Neoplasias Renales/orina , Neoplasias Pulmonares/patología , Neoplasias Pulmonares/secundario , Masculino , Tamizaje Masivo , Persona de Mediana Edad , RiesgoRESUMEN
BACKGROUND: Fine needle aspiration cytology (FNAC) can be used for establishing a diagnosis of cutaneous lesions, especially in cases with cyst formation. Poroid hidradenoma is eccrine neoplasm with both solid and cystic components. CASE: A 77-year-old female presented with a slightly elevated nodule in the skin on her left elbow. The tumor was well demarcated, 2.7 x 2.4 cm and soft, and overlying skin was slightly reddish. FNAC revealed two types of cell: one had abundant cytoplasm in which small to large, occasionally multinucleated nuclei with small but distinct nucleoli were evident. Chromatin was finely granular, and nuclear membrane was thin and almost smooth. Another type of cell had scanty cytoplasm and a round to oval nucleus with small but prominent nucleoli. Histologic diagnosis was poroid hidradenoma. CONCLUSION: FNAC can be useful for diagnosing intradermal cystic lesions before surgical resection.