- Tytuł:
- Somaclonal variation in winter wheat [Triticum aestivum L.]: frequency, occurrence and inheritance
- Autorzy:
-
Cheng, X Y
Gao, M.W.
Liang, Z.Q.
Liu, G.Z. - Powiązania:
- https://bibliotekanauki.pl/articles/2044461.pdf
- Data publikacji:
- 1998
- Wydawca:
- Polska Akademia Nauk. Czytelnia Czasopism PAN
- Tematy:
-
inheritance
tissue culture
Triticum aestivum
occurrence
in vitro
winter wheat
gene mutation
plant breeding
callus induction
frequency
somaclonal variation
wheat
embryo - Opis:
- Plants were regenerated from immature embryo cultures of 35 winter wheat genotypes. General responses of regenerated plants were investigated and a total of 7142 R₂ spike lines from 1593 R₁ plants were assessed in the field for somaclonal variants in 1985/86, 1986/87 and 1987/88. Selected variants were studied for their possible genetic inheritance. From regenerated plantlets, 81% survived and 63% produced fertile plants. Forms with reduced plant height, length of spike and other morphological abnormalities were found in this progeny. Populations of R₁ plants were highly variable due mainly to the physiological disturbances resulting from the in vitro process. Overall somaclonal variation frequencies were 14.2% per plant basis and 5.3% per R₂ spike basis. The variants were similar in the three different R₂ generations with predominant variants being negative in plant height, maturity, awns, spike type and plant type. Both uniform R₂ variant families and spike lines were found in addition to the segregating variants which constituted the majority. On average, in a variant family or line, 18% and 14% of their component lines and plants were variants, respectively. Inheritability was demonstrated for the uniform variant families and spike lines as well as segregated variants. Of those 134 selections, about 70% were classified as inheritable. Both recessive and dominant gene mutations at one, two or three loci were evident in some variants as suggested by the segregating data.
- Źródło:
-
Journal of Applied Genetics; 1998, 39, 1; 59-72
1234-1983 - Pojawia się w:
- Journal of Applied Genetics
- Dostawca treści:
- Biblioteka Nauki
Artykuł