Fertility improvement in pea [Pisum sativum L.] autotetraploids - mutation breeding

• Autorzy: Kumar H , Mercykuty V.C. , Srivastava C.P.
• Języki publikacji: EN

Abstrakty

EN

C₂ seeds of autotetraploids (colchicine-induced) of two diverse genotypes, T 163 and 5064-S, of pea (Pisum sativum L.) and their corresponding diploids were irradiated with 10 kR gamma-ray. Autotetraploids showed a high seed-sterility as compared to diploids. Seed fertility increased in M₂ as compared to M₁. Both quadrivalent and bivalent frequencies decreased in the M₁ generation of autotetraploids in relation to their respective controls. However, a positive shift in the mean bivalent formation was noted at the cost of other configurations in C₃-M₂ with respect to C₂-M₁ and varied with the genotype. In the M₂ generation of autotetraploids, the variability was relatively higher for the number of pods per plant and seed yield per plant. Although the mean values for pods per plant, number of seeds per pod and seed yield per plant remained more or less parallel in autotetraploids in M₁ and M₂ generations, there was an increase in the upper range limit probably due to micromutation for these characters in M₂.

Słowa kluczowe

EN

mutation breeding; micromutation; fertility improvement; autotetraploid; disjunction index; pea; Pisum sativum; seed

• Wydawca: -
• Czasopismo: Journal of Applied Genetics
• Rocznik: 1995
• Tom: 36
• Numer: 1
• Opis fizyczny: p.43-48

Twórcy

autor

Kumar H

• Banaras Hindu University, Varanasi 221 005, India

autor

Mercykuty V.C.

autor

Srivastava C.P.

Bibliografia

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