Identifying qtls related to stay-green, yield and yieldcomponents in wheat under hot and humid environment
Başlık çevirisi mevcut değil.
- Tez No: 722585
- Danışmanlar: DR. ALİ BABAR
- Tez Türü: Yüksek Lisans
- Konular: Besin Hijyeni ve Teknolojisi, Biyoloji, Ziraat, Food Hygiene and Technology, Biology, Agriculture
- Anahtar Kelimeler: Belirtilmemiş.
- Yıl: 2018
- Dil: İngilizce
- Üniversite: University of Florida
- Enstitü: Yurtdışı Enstitü
- Ana Bilim Dalı: Belirtilmemiş.
- Bilim Dalı: Belirtilmemiş.
- Sayfa Sayısı: 86
Özet
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Özet (Çeviri)
High temperature (HT) stress is a major limitation for wheat production in most of the wheat growing areas all over the world. HT, especially after anthesis, impacts the morphological, physiological, and metabolic processes in wheat and ultimately reduces yield and quality. Sink strength (grain number) is a key yield limiting factor in modern wheat varieties. Improving the partitioning of assimilates and increasing spike fertility is essential to increase yield and cope with the effects of climate change. Also, the StayGreen trait is considered as an important trait to increase heat tolerance in many crops including wheat. Thus, the objective of this study was to phenotypically and genotypically characterize the spike fertility, yield and yield contributing traits and staygreen traits in AGS2000/NC06-19896 doubled haploid bi-parental wheat population under hot and humid environmental conditions. Grain filling rate (GFR), grain m-2 (GM2), harvest index (HI), spike fertility (SF), spike M-2 (SM-2 ), thousand grain weight (TGW) and stay-green showed strong positive correlation with yield under HT stress, indicating the potential of these traits to be used for genetic improvement under heat stress conditions. 11 Total thirty-four quantitative trait loci (QTL) were identified on chromosomes 2A, 3A, 4A, 4B, 5B and 6A associated with traits such as; HD, MD, GFR, SM-2 , GM-2 SF, TGW, HI, Stg, RS and yield. A maximum number of QTLs were identified in chromosome 5B, followed by 2A, 3A, 4A, 4B and 6A. The identified QTLs will improve our understanding of the genetic basis that controls the HT stress tolerance in wheat. The results of this study are valuable for future genetic improvement of yield and yield related traits under HT stress environments.
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