AFLP analysis of genetic relationships among aromatic grapevines (Vitis vinifera).

Genotypic diversity has been detected among aromatic grapevines (Vitis vinifera) by molecular markers (AFLPs). The 22 primer-pairs generated a total of 1,331 bands of which 564 (40%) were polymorphic over all the genotypes. The bootstrap analysis pointed out that a large number of polymorphic bands (200-400) has to be used for a better estimation of the genetic distances among genotypes; 383 polymorphic AFLP bands were used for the cluster and the principal coordinate analyses because they did not present missing data across all the genotypes. The cluster analysis (UPGMA), based on polymorphic AFLP markers, revealed no relationship between the Moscato and Malvasia grapevines. The Malvasias, unlike the Moscatos distinguished by their distinct muscat aroma, have to be considered a more complex group because it includes muscat and non-muscat grapevines. The principal coordinate analysis (PCO) confirmed the pattern of the cluster analysis only for those varieties which presented a low coefficient of dissimilarity, while for the other varieties there was no correspondence between the two analyses. The pattern of aggregation among aromatic grapevines in the cluster and principal coordinate analyses does not support any classification that might include an aromatic grapevine group in V. vinifera. Even though some synonyms and homonyms are present among aromatic grapevines (V. vinifera), genetic diversity exists among genotypes in AFLP markers.

Infusing a teacher preparation program in learning disabilities with assistive technology.

A recent trend in the fields of special education, rehabilitation, and technology is the development and implementation of assistive technology (AT) devices and services to assist individuals in compensating for disabilities and/or utilizing functional capabilities to meet environmental demands. AT devices and services have major implications for individuals with learning disabilities (LD) regarding life span issues, environmental and curricular accessibility, and compensatory strategies. Faculty members in higher education who are responsible for designing teacher preparation programs in LD must explore ways to structure curricula, methodologies, and practica to better prepare teachers to work with students who use AT devices to compensate for their specific learning disabilities. The purpose of this article is to describe curriculum design steps and barriers to and solutions for infusing LD teacher preparation programs with assistive technology.

Genomic relationships between Dasypyrum villosum (L.) Candargy and D. hordeaceum (Cosson et Durieu) Candargy.

The origin and genomic constitution of the tetraploid perennial species Dasypyrum hordeaceum (2n = 4x = 28) and its phylogenetic relationships with the annual diploid Dasypyrum villosum (2n = 2x = 14) have been investigated by comparing the two genomes using different methods. There is no apparent homology between the conventional or Giemsa C-banded karyotypes of the two Dasypyrum species, nor can the karyotype of D. hordeaceum be split up into two similar sets. Polymorphism within several chromosome pairs was observed in both karyotypes. Cytophotometric determinations of the Feulgen-DNA absorptions showed that the genome size of D. hordeaceum was twice as large as that of D. villosum. Both the cross D. villosum x D. hordeaceum (crossability rate 12.1%) and the reciprocal cross (crossability rate 50.7%) produced plump seeds. Only those from the former cross germinated, producing sterile plants with a phenotype that was intermediate between those of the parents. In these hybrids (2n = 21), an average of 13.77 chromosomes per cell paired at meiotic metaphase I. Trivalents were only rarely observed. Through dot-blot hybridizations, a highly repeated DNA sequence of D. villosum was found not to be represented in the genome of D. hordeaceum. By contrast, very similar restriction patterns were observed when a low-repeated DNA sequence or different single-copy sequences of D. villosum or two sequences in the plastidial DNA of rice were hybridized to Southern blots of the genomic DNAs of the two Dasypyrum species digested with different restriction endonucleases. By analyzing glutamic-oxaloacetic-transaminase, superoxide dismutase, alcohol dehydrogenase, and esterase isozyme systems, it was shown that both Dasypyrum species shared the same phenotypes, which differed from those found in hexaploid wheat. In situ hybridizations using DNA sequences encoding gliadins showed that these genes were located close to the centromere of three pairs of D. villosum chromosomes and that they had the same locations in six pairs of D. hordeaceum chromosomes. We conclude that the autoploid origin of D. hordeaceum from D. villosum, which cannot be defended on the basis of chromosomal traits, is suggested by the other findings obtained by comparing the two genomes. Key words : Dasypyrum hordeaceum, Dasypyrum villosum, phylogenetic relationships.

The evolution of polyploid wheats: identification of the A genome donor species.

Cytogenetic work has shown that the tetraploid wheats, Triticum turgidum and T. timopheevii, and the hexaploid wheat T. aestivum have one pair of A genomes, whereas hexaploid T. zhukovskyi has two. Variation in 16 repeated nucleotide sequences was used to identify sources of the A genomes. The A genomes of T. turgidum, T. timopheevii, and T. aestivum were shown to be contributed by T. urartu. Little divergence in the repeated nucleotide sequences was detected in the A genomes of these species from the genome of T. urartu. In T. zhukovskyi one A genome was contributed by T. urartu and the other was contributed by T. monococcum. It is concluded that T. zhukovskyi originated from hybridization of T. timopheevii with T. monococcum. The repeated nucleotide sequence profiles in the A genomes of T. zhukovskyi showed reduced correspondence with those in the genomes of both ancestral species, T. urartu and T. monococcum. This differentiation is attributed to heterogenetic chromosome pairing and segregation among chromosomes of the two A genomes in T. zhukovskyi.

Chromosomal location of seed storage protein genes in the genome ofDasypyrum villosum (L.) Candargy.

Genes coding for glutenin-like subunits and for several prolamin subunits with electrophoretic mobilities (lactate-PAGE) corresponding to those of omega- and gamma-gliadins of wheat were located inDasypyrum villosum chromosome1V. Genes controlling four gliadinlike subunits with electrophoretic mobilities corresponding to those of alpha- and gamma-gliadins were located on the short arm of chromosome6V and on the long arm of chromosome4V. N-terminal amino acid sequences of these four components were also determined and homology with alpha-type gliadins was demonstrated. The presence of genes coding for glutenin- and gliadin-like subunits on chromosomes1V and6V demonstrates homoeology between theD. villosum chromosomes1V and6V and the chromosomes of homoeologous groups 1 and 6 in wheat. It is likely that the additional locusGli-V3 on chromosome4V originated by translocation from theGli-V2 locus.

The addition of Dasypyrum villosum (L.) Candargy chromosomes to durum wheat (Triticum durum Desf.).

Six monosomic addition lines were produced in which different Dasypyrum villosum (L.) Candargy chromosomes were added to the chromosome complement of Triticum durum Desf. cv. 'Creso'. Each added alien chromosome was found to have a specific effect on plant morphology and fertility. Transmission rate varied widely (from 7.5 to 27.7%) among the six univalent chromosomes. Different monotelosomic addition plants derived by a relatively high frequency of chromosome misdivision were isolated. The addition lines should be useful for studying Dasypyrum chromosome homoeology and the introduction of alien variation into durum and common wheats.

Topical testosterone propionate in the therapy of vulvar dystrophies.

187 patients with atrophic, hypertrophic and mixed vulvar dystrophy were treated with 2% testosterone propionate ointment from 18 months to 7 years. Symptoms, macroscopic, and histologic picture were evaluated before and during treatment. About 75% of the patients achieved good and excellent symptom relief. Treatment efficacy differentiates according to the type of dystrophy, and in relation to the lesion's extension and the duration of symptoms, which consist mostly of pruritus. Side effects from therapy were negligible.

Vulvar lesions at risk. Prevention, clinical methodology and therapy.

In confronting the problem of prevention and early diagnosis of vulvar lesions at risk, the diagnostic methodology for their recognition and the therapeutic measures best taken are discussed. Through the use of routine, ambulatory screening tests, it is possible to detect and recognize those pathological situations which may evolve towards neoplasia. Among these, the vulvar dystrophies, some viral infections and sexually-transmitted diseases are particularly at risk. Patients with oncologic precedents are also at risk as well as patients receiving immunosuppressive therapy.

Hormone receptors in dystrophic and neoplastic vulvar disease. Preliminary considerations.

Hormone receptor assays for testosterone, estrogens and androgens were performed on 53 biopsy specimens of vulva from 40 patients, consisting of 6 with normal tissue, 14 with atrophic type dystrophy, 13 with hypertrophic type dystrophy, and 20 with malignancy. Atrophic and hypertrophic forms showed a different receptor pattern; hypertrophic forms were characterized by consistently higher levels of progesterone receptors not correlated with estrogen receptors. Neoplastic tissue showed no significant changes in values compared to normal or dystrophic forms, but range of variability was high. The bond between neoplastic forms and hormone activity seems without doubt less important than in the corresponding endometrial and mammary forms. The study of dystrophic forms, instead, should be further explored with a larger number of cases.

Plain films of the abdomen in term pregnancy.

Plain films of the abdomen taken during pregnancy at term from 1971 to 1981 at the Radiology Service of the Obstetric and Gynecological Clinic of the University of Padua are summarized and analysed. The average frequency of X-ray investigation is 0.5%, ranging from 0.06% (in 1980) to 2.11% (in 1977), compared to Carmichael's data which range from 11 to 30%. Indications have remained fairly constant over the years, in view of the very low incidence of this examination. The most significant finding is the greater incidence of fetal malformation in recent years, and is explained by a more efficacious program of pregnancy screening. X-ray examination may be still employed in some cases to obtain superior information regarding the best definition of gestational age, some fetal malformation, and in rare cases, hemolytic disease.

Vulvar neoplasias in patients with previous cancer history.

The presence of second neoplasia in association with vulvar neoplasia is significant. We confirm the usefulness of including a screening procedure for vulvar neoplasia in the follow-up of patients with gynecological cancer, especially those with carcinoma of the portio. Patients with a first gynecological neoplasia who present vulvar viral infection, or dystrophies, or who have undergone radiotherapy or immunosuppressive treatment are considered at high risk.

Multiple tumors of the female genital tract.

The increased incidence of multiple primary tumors of genital-breast district has been evaluated, with the possibility of early diagnosis which consent greater survival in cancer patients. We found a particular high incidence of second neoplasia associated with vulval tumors (7.4%). With regard to pathogenetic factors, the oncogenic role of certain treatments is undoubtedly important, especially if they are protracted in time. It is necessary that these patients undergo complete gynecological screening for a time period that is much longer than that held sufficient to consider a patient cured.

What are the most suitable fetoplacental tests in the monitoring of the third trimester of pregnancy?

The case-series of the Institute of Obstetrics and Gynaecology were examined to evaluate the suitability of urinary estriol, total plasma estriol, unconjugated plasma estriol, unconjugated plasma estetrol, plasma placental lactogen, plasma S.P.-1 glycoprotein, plasma alphafetoprotein and biparietal diameter in correctly forecasting the perinatal risk, when performed after the 25th week of pregnancy. In high-risk pregnancies, according to our results, S.P.-1 glycoprotein and urinary estriol are the most sensitive tests, while S.P.-1 glycoprotein, placental lactogen and biparietal diameter are found to have the highest predictive value. The repetition of the considered tests increases their sensitivity, but not their predictive value. In pregnancy mass screening the most suitable tests, on the basis of the "relative risk" are S.P.-1 glycoprotein (or even placental lactogen), estriol and biparietal diameter. For the last one a single measurement seems to be enough during the third trimester.

Original technique in mammary echotomography.

The Authors report a new technique of employing mammary echotomography. The patient, in prone position, is tested with her breasts immersed in water, using a linear array of 2.8 MHz.

Basal cell carcinoma of the vulva.

Six patients with basal cell carcinoma of the vulva underwent differentiated surgical therapy, and their courses were evaluated. No apparent differences in survival time and absence of recurrences and metastases were observed inthe patients treated with radical vulvectomy (1 case), simple vulvectomy (3 cases) and local excision (2 cases). Conservative surgical therapy is therefore considered most indicated.