Genetic variation in the efficiency of nitrogen utilization and photosynthetic activity of flag leaves among the old and modern germplasm of winter wheat

• Autorzy: Gorny A G , Garczynski S , Banaszak Z , Lugowska B
• Języki publikacji: EN

Abstrakty

EN

Genotypic variation in major components of the efficiency of nitrogen utilization and photosynthetic activity of flag leaves among old (released 1881-1963) and modern (released 1969-2003) cultivars of winter wheat was studied in field conditions under varied N fertilization levels (110, 90 and 80 kg N ha⁻¹). Significant genotypic differences were observed for all characters. Their heritabilities ranged from 0.37 to 0.93 and were the lowest for the leaf efficiency of gas exchange, photosynthetic rate, straw N content and the economic index of N utilization efficiency (NUE). Some modern cultivars exhibited an enhanced tolerance to N shortage and several attributes of efficient N utilization (e.g. later senescing and more photosynthetically active flag leaves, increased ability to redistribute N into grains). The genotypes may serve as donors of appropriate characteristics for breeding. The observed cultivar-by-fertilization interactions suggest, however, that evaluations under diverse fertilization regimes may be necessary when searching for improved wheat efficiency and adaptation to less favourable environments.

Słowa kluczowe

EN

nitrogen utilization; plant genetics; winter wheat; modern germplasm; photosynthesis; genetic variation; activity; germplasm; wheat; flag leaf; old germplasm; adaptation; leaf photosynthesis

• Wydawca: -
• Czasopismo: Journal of Applied Genetics
• Rocznik: 2006
• Tom: 47
• Numer: 3
• Opis fizyczny: p.231-237,fig.,ref.

Twórcy

autor

Gorny A G

• Institute of Plant Genetics, Polish Academy of Sciences, Strzeszynska 34, 60-479 Poznan, Poland

autor

Garczynski S

• Institute of Plant Genetics, Polish Academy of Sciences, Strzeszynska 34, 60-479 Poznan, Poland

autor

Banaszak Z

• Danko Plant Breeding Lts., Choryń, Poland

autor

Lugowska B

• Danko Plant Breeding Lts., Choryń, Poland

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