Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 6/8/1999
Publication Date: N/A
Technical Abstract: Most popcorn germplasm, when compared with dent corn, is relatively inferior in resistance to root lodging and stalk breaking. The value of dent corn inbreds as parents in crosses to add lodging resistance to popcorn would be dependent upon the successful recovery in segregating generations of popcorn quality characters, such as high expansion and tenderness. The objective of this study was to evaluate selection progres in three dent corn popcorn composites (South American Popcorn Composite, SAPC; Supergold Popcorn Composite, SGPC; and White Popcorn Composite, WPC) plus topcrosses between each composite and BSP2C1. Data showed significant gains in popping expansion for oil and microwave popping in the three composite populations (30.1% and 34.1% total gain for three cycles for oil popping and microwave popping, respectively). Popping expansion levels, however, remain far below the 40 cc/g desired commercially. Because of the eimportance of popping expansion, a breeder must be prepared for substantia effort towards recovery of satisfactory popping quality when introgressing dent germplasm. In our study, a 25% introgression of dent germplasm may have been a better level to have chosen. Inbred line extraction from each cycle of selection has resulted in four lines, two from SAPC and two from SGPC that are in the final stages of evaluation. No WPC lines had sufficient popping expansion to warrant further development. Two cycles of rind penetrometer selection have been completed in the original South American Popcorn and Supergold Popcorn received from the Kansas Ag. Exp. Station.