h. basiri

In order to consider the effect of different irrigation treatments on triticale and considering the probability of screening some suitable genotypes tolerant to drought stress, a two-year study (2018 and 2019) with four irrigation regimes (normal irrigation and withholding irrigation in thrre different growing stages containing flowering, milky seed, and seed filling) and nine elite genotypes (Sanabad, Paj, Javanilo, ET-92-15, ET-92-18, ET-83-20, ET-85-17, and ET-83-18) was performed. Grain yield of the triticale genotypes were measured in all treatments and used to estimate the tolerance and stability of the genotypes based on numerous number of related indices. Since, according to results of this study, no single index could be suitable for distinguishing tolerant genotypes, these indices should be applied together and extract information from all of such tolerance indices by using multivariate methods. In this study in addition to biplot based on PCA, a new method as heatmap was also applied. Furthermore, multivariate stability indices containing AMMI and GGE models applied for finding stable genotypes. According to the results of tolerance indices, genotypes ET-85-04, Sanabad, and Paj were the most tolerant genotypes in response to drought stress condition in comparison to other genotypes. Meanwhile, The results of stability analyses indicated that genotypes ET-85-04 and ET-83-20 were the genotypes with lowest variability in different environments. Therefore, ET-85-04 based on the results from both tolerance and stability indices is an suitable genotype to be used as a candidate for releasing new cultivars of triticale genotypes or applied in future breeding plans. In this study the results indicated that using stability and tolerance measuring methods together as a mixed method can be the most effective way to distinguish proper genotypes.

Background:

An obvious substitute for the diseased aortic valve is a healthy duplicate. Despite increasing experience in a half century, the search for an ideal valve replacement for a diseased aortic valve continues.Homograft (allograft) aortic valve is a good choice in endocarditis and complex aortic valve and ascending aorta pathology.

Methods:

Between March 1996 and Oct. 2000, ten patients (3 females, 7 males), aged 16 - 58 years (mean 32.6) underwent aortic root replacement using cryopreserved aortic homograft, due to native or prosthetic aortic valve endocarditis and aneurysm of ascending aorta.

Results:

The length of hospital stay was 10 to 85 days (mean 32.6) with one in-hospital death (%10). The patients were followed up for 1 to 90 months (mean 35.2) with no incidence of thromboemboli, endocarditis, or reoperation and are now in good functional class.

Conclusion:

Aortic root replacement is the procedure of choice in endocarditis. It could be done even in high-risk and redo patients with acceptable mortality.