Effect of gamma radiation on variation of progenies from crosses between cultivated and wild mungbeans
2001
Sanan Reiwthongchum | Worawit Sorajjapinan | Peerasak Srinives | Napaporn Hual-alai(Kasetsart Univ. Kamphaeng Saen Campus, Nakhon Pathom (Thailand). Faculty of Agriculture. Dept. of Agronomy)
F2 seed from the crosses V. radiata x V. radiata (wild), V. radiata (wild) x V. radiata, V. mungo x V. mungo (wild), V. mungo (wild) x V. mungo were irradiated with 100, 200, 500 and 700 Gy of gamma rays. Quantitative response to irradition was found only in 1,000 seed weight of M1 plants from the blackgram crosses. In M5 generation, 20 mutant lines were isolated from the mungbean crosses and divided into five groups, viz. short plant and dark-green leaf, dark-green leaf, multiple leaflet, waxy leaf and oval-shaped seed. In preliminary yield trail, all mutant groups had lower plant height and number of seeds per pod than parents. The short plant and dark-green leaf gave higher number of pods per plant, 1,000 seed weight and grain yield than the parental group. The dark-green group had higher average number of seeds per pod, 1,000 seed weight and grain yield than the multiple leaflet group, but lower in number of pods per plant. The waxy leaf group had the lowest average of plant height, number of pods per plant, 1,000 seed weight and grain yield. Plant height difference among the dark-green leaf groups did not affect yield and yield components.
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