TITLE:
Biochemical Composition and Disease Resistance in Newly Synthesized Amphidiploid and Autotetraploid Peanuts
AUTHORS:
Krishna Shilpa, Gururaj Sunkad, Srinivasu Kurella, Swati Marri, Kollipara Padmashree, Deepak R. Jadhav, Kanwar Lal Sahrawat, Nalini Mallikarjuna
KEYWORDS:
Amphidiploid; Autotetraploid; Biochemical; Disease Resistance; Fatty Acid; Late Leaf Spot; Peanut;
JOURNAL NAME:
Food and Nutrition Sciences,
Vol.4 No.2,
February
6,
2013
ABSTRACT: Genetic diversity in peanut (Arachishypogaea L.) is narrow due to its evolution and domestication processes. Amphidiploids and autotetraploids (newly synthesized tetraploids) were created to broaden its genetic base. Molecular analysis has shown that the newly synthesized tetraploids had broader genetic base; and were genetically divergent when compared to cultivated peanut. Nutritional composition relative to oil, fatty acid composition, O/L ratio, protein, iodine value and presence of plant proteinase inhibitors such as trypsin and chymotrypsin inhibitors were studied in the synthesized tetraploids. Some of the newly synthesized tetraploids had higher amounts of proteinase inhibitors. Evaluation of newly synthesized tetraploids revealed several lines resistant to late leaf spot (LLS) and peanut bud necrosis disease (PBND).