PJB-1990-22
SOMACLONAL VARIANT PLANTS OF WHEAT (TRITICUM AESTIVUM L.)WITH INCREASED FLAG LEAF SIZE, HEAD SIZE AND GRAIN NUMBER
AKBAR S. MOHMAND AND MURRAY W. NABORS
DOI:
Abstract
Bread wheat (Triticum aestivum L. em Thell., 2n
= 6x = 42) callus cultures of 3 spring wheat
cultivars (Glennson, Pavon , PAK-16171) were selected for 90 days on medium containing 0,
10, 15, 20 and 25% (w/v) PEG-4000. Somaclonal variation was examined in the R1 generation. Comparisons were made among the somaclones and their non-tissue cultured parents . Characteristics examined included days to 50% heading , flag leaf length , width nand area;
plant height; spike length; number of grains per
spike and days to maturity . Significant variation was found in all the characteristics measured. The most remarkable were observed in the flag leaf length and area , 3 to 4 times greater in somaclones 71B88R1, 71C88R1 and 71D88R1 and 2 to 3 times greater in somaclones PA88R1 and PB88R1 than the parent lines. The somaclones produced longer spikes and yielded more grains per spike than the parent lines.
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