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Inheritance of some mutations: photoperiodic insensitivity, earlier maturity in the summer crop induced from native rice varieties in South Vietnam.

Last modified on 7/1/2009 at 2:04:00 PM. Total 1133 views.

SUMMARY

Originally native rice varieties: Tai nguyen duc, Tep hanh, Nang huong, Nang thom cho dao and the new mutant rice varieties (Tai nguyen dot bien, Tep hanh dot bien), mutant lines (Nang huong dot bien, Nang thom cho Dao dot bien- 3, Nang thom cho Dao dot bien- 5) from them were used for our research.

F1 seeds were cultivated in the spring crop and the complementary treatment by dark cabin.

The dominant degree in F1 (hp) was determined from Belli and Atkius (1966).

The separation in different phenotypic classes in F2 based o­n the bio- statistical formula: FoB13Fo63.

The results obtained were as follows: the mutations created photoperiodic insensitivity were recessive. The mutations created earlier maturity were incompletely recessive and their expressions were influented by the cytoplasm from the maternal varieties. These mutations were transmitted to offring from Mendenian law in monohybird.

When parents have similar vegetative duration, in F2 were progressively positive or negative phenotypic segregations.

Nguyen Minh Cong
Hanoi Pedagogical University
Nguyen Thi Mong
Ho Chi Minh City Pedagogical University

(Genetics and Applications, No2 2005)

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