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
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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