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In soybean, Greybcrch et al. (1987) ohwed d.creased yield In 2 of 19 regenerated families.
One family also was faller while 2 showed putative sterility.
In tomato, Buialtl et al. (1985) showed that 17.04% of the progenies of plants regenerated from
cotyledons exhibited chlorophyll mutations and mwphologlcal abnormalltles whlch
segregated in a 3: 1 ratio.
2.1 d GENOTYPIC VAPlAnON FOR QUAUTATlVE TRAITS
The most distinctive feature d wmaclonal variation is the occurrence of homozygous
mutations in the initial regenerants. Evans and Sharp (1983) recovered 13 rlngle gene
mutations (two of which are f ~ icolour l and jointless pedicel mutants) from 230 regenerated
lomato plants without any selection pressure. George and Rao (1983) found a yellow seeded
mutant in Brassica juncea. Dwalf plants in rice (Oono, 1985 and Sun et al., 1983), potato leal
mutant (Govd et al., 1987), and a vigorous growing lettuce seedling (Engler and Grogan,
1984) were also recovered. In wheat, a full awned mutant (Larkin ei al., 1984), white grained
mutant (Larkin, 1985), and a gllodin mutant (Maddock et ai., 1985) were alto reported. In
mung bean Bhatia and Mathews (1988) reported the recovery d rnonogenically inherited
recessive as well as domlnant mutation from tissue cultured plants. me dull seed suttace war
Inherited as monogenic dominant and green cofyledon tmil op momgenic recessive. The two
true breeding somaclonal variants crossed to their respective phenolypically Identical
radiation induced mutants dld not segregate indicating allelism. Blngham and McCoy (1986)
also reviewed qualUative and quanfflatlve varlatlon In alfaUa which Included monogenlcolly
recessive variants like abnormal flowen, dmple leaves ond ~dlmentci~y nowen. In wheat,
Larkln et d. (1 984) repotted both quantltatlve and quafflative troU varlaHon. Heiitable voriotlon
wos O ~ S O N 101 ~ pih ~ hem, pounce ond atmm of awns, nIw number, heading date,