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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2017.1
- 수록면
- 78 - 87 (10page)
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초록· 키워드
오류제보하기
Aggregate selection helps making selection decisions for improved profitability and permits to exploit information on correlated traits to improve accuracy. In the present study, the efficiency of trait selection was assessed by the Smith-Hazel (SHI) and the Pesek-Baker (PBI) models in 35 wheat genotypes under drought stress at heading and well-irrigated conditions at the Research Farm of Shiraz University, Iran in 2011 and 2012 years. The analysis of correlated response (CR) revealed that thousand grain weight (TGW) with CR = 24.05 (in 2011) and 9.15 (in 2012) and harvest index (HI) with CR = 18.37 (in 2011) and 9.08 (in 2012) had higher indirect effects on grain yield (GY) increase under drought stress. In both years, biological yield (BY), grain number/spike (GN), TGW, and GY had the highest genetic gain (ΔG) in SHI model. The top ten landraces in PBI for the trials in 2011 were also placed in the top rankings for grain yield under drought stress conditions. These results and estimation of the efficiency of selection (ΔH) revealed that PBI (ΔH = 19.95 and 16.5 in the first and 11.15 and 11.06 in the second year) was more efficient than SHI (ΔH = 9.58 and 8.97 in the first and 9.74 and 8.59 in the second year) in view of identifying superior genotypes based on aggregate trait selection. Overall, repeatability estimates for grain yield (33%-57.8%) was relatively low showing that individual plant selection has low efficiency for wheat improvement whilst aggregate trait selections leads to relatively high genetic gain (1.63-2.75) for grain yield.
목차
등록된 정보가 없습니다.
참고문헌 (34)
참고문헌 신청
Ahmadikhah A / 2016 / Effect of reduced plant height on drought tolerance in rice / 3 Biotech 6:221
Ajala SO / 2010 / Expected responses to aggregate trait selection in maize (Zea mays L.) / J. Food Agr. Env 8:185~189
Araus JL / 2003 / Breeding cereals for mediterranean conditions: ecophysiological clues for biotechnology applications / Ann. Appl. Biol 142:129~141
Asghar MJ / 2010 / Selection indices for yield and quality traits in sweet corns / Pak. J. Bot 42:775~789
Bertoldo JG / 2010 / Genetic gain in agronomic traits of common bean in the region of Planalto Catarinense / Euphytica 171:381~388
Ajala SO / 2010 / Expected responses to aggregate trait selection in maize (Zea mays L.) / J. Food Agr. Env 8:185~189
Araus JL / 2003 / Breeding cereals for mediterranean conditions: ecophysiological clues for biotechnology applications / Ann. Appl. Biol 142:129~141
Asghar MJ / 2010 / Selection indices for yield and quality traits in sweet corns / Pak. J. Bot 42:775~789
Bertoldo JG / 2010 / Genetic gain in agronomic traits of common bean in the region of Planalto Catarinense / Euphytica 171:381~388
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