Evaluation of salt tolerance in a mapping population of quinoa
Başlık çevirisi mevcut değil.
- Tez No: 795926
- Danışmanlar: DR. ROBERT VAN LOO
- Tez Türü: Yüksek Lisans
- Konular: Ziraat, Agriculture
- Anahtar Kelimeler: Belirtilmemiş.
- Yıl: 2023
- Dil: İngilizce
- Üniversite: Wageningen Universiteit
- Enstitü: Yurtdışı Enstitü
- Ana Bilim Dalı: Belirtilmemiş.
- Bilim Dalı: Belirtilmemiş.
- Sayfa Sayısı: 47
Özet
Özet yok.
Özet (Çeviri)
Salinity is an important abiotic stress which affect the growth of the plants and their productivity severely. It is crucial to understand the key aspects of the plant salt tolerance in order to breed for more tolerant crops. Quinoa is very nutritious crop and is considered facultative halophyte crop which means that quinoa cope with salinity stress even under salinity level as high as sea water contains and also can grow in normal conditions. By this reason, the importance of investigating the salinity resistance of quinoa is growing. The aim of the project was to evaluate the salinity effect on F2 population of the varieties, Atlas and Red Carina. In the trial, two salt levels were examined, a non-saline treatment at an EC of about 0.5 to 1.5 dS/m and a saline treatment starting at 2 dS/m and reaching around 20 dS/m after 10 weeks long salt applications. Furthermore, 94 genotypes of the mapping population, the two parents of the mapping population and variety Pasto were evaluated. Under saline condition, plant growth rates were lower than under non-saline conditions and the effect was apparent in many growth rate related traits such as grain yield, harvest index, plant length, thousand seed weights (TSW), flowering time and stomatal conductance. Additionally, correlations of traits were presented and explained separately for each treatment (control and salt) to have better understanding of quinoa's salinity mechanism. There was significant interaction between the genotypic effect and salinity in mapping population. Moreover, the segregation in the mapping population was used to find QTLs (quantitative trait loci) for the traits evaluated under saline condition and in normal condition. In total, 66 QTLs with high explained variation percentage were identified from 20 linkage groups. Comparing to broad sense heritability scores, QTLs were not overfitting and some of them might be used for selecting varieties under non-saline conditions and also for saline conditions.
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