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논문 기본 정보

자료유형
학술저널
저자정보
Asmaa M. Mohamed (Department of Genetics Faculty of Agriculture Assiut University Assiut 71526 Egypt) Mohamed K. Omara (Department of Genetics Faculty of Agriculture Assiut University Assiut 71526 Egypt) Mahmoud A. El-Rawy (Department of Genetics Faculty of Agriculture Assiut University Egypt) Mohamed I. Hassan (Department of Genetics Faculty of Agriculture Assiut University Assiut Egypt)
저널정보
한국육종학회 Plant Breeding and Biotechnology Plant Breeding and Biotechnology Vol.7 No.2
발행연도
2019.1
수록면
83 - 94 (12page)

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Two consecutive cycles of selection were imposed on five F2 populations of bread wheat. The first cycle was a divergent selection for spike length conducted in favorable environment (optimal sowing date) and the response was measured under favorable and heat stress conditions of a late sowing date. Positive responses to selection for longer spikes were obtained under favorable (13.43%) heat stress (8.66%) conditions, whereas the responses for shorter spikes were 2.24 and 5.02% in the two environments, respectively. The realized heritability of spike length was greater under favorable conditions (0.25-0.56) than under heat stress (0.18- 0.41). Concurrent positive responses to selection for longer spikes were obtained in grain yield per spike under favorable (25.35%) and heat stress (13.65%) environments. Selection for greater number of grains per spike imposed on F3 plants selected for spike length under heat stress resulted in significant responses (14.65%). Selection for greater number of grains per spike resulted in correlated responses in grain yield per spike (17.64%). The concurrent positive responses produced in spike length in F4 with selection for number of grains per spike (averaged 9.20%) was almost equal to that produced by the direct selection in F3 (8.66%), indicating that selection advance effected in F3 has been maintained in F4. High F4/F3 regression was obtained for spike length under heat stress (b = 0.85 ± 0.07), indicating high heritability. In conclusion, phenotypic selection for longer spikes under heat stress followed by a cycle of selection for number of grains per spike was capable of improving heat tolerance in wheat.
#Bread wheat #Heat tolerance #Selection and Spike length

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참고문헌 (34)

참고문헌 신청
Abdoli M / 2013 / The role of current photosynthesis on grain yield formation, some agronomic characteristics and germination traits in wheat cultivars under terminal drought stress condition / Intl. J. Agri. Crop Sci 5:1585~1594 google schola Acevedo E / 1991 / Effects of heat stress on wheat and possible selection tools for use in breeding for tolerance / Wheat for the nontraditional warm areas. Proc. Int. Conf. :401~421 google schola Akter N / 2017 / Heat stress effects and management in wheat: A review / Agron. Sustain. Dev 37:37 google schola Al-Khatib K / 1999 / High temperature effects on photosynthetic processes in temperate and tropical cereals / Crop Sci 39:119~125 google schola Araus JL / 1993 / Ear photosynthesis carbon isotope discrimination and the contribution of respiratory co2 to differences in grain mass in durum wheat / Plant Cell Environ 16:383~392 google schola

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