Yield potential of super sweet corn genotypes in progressive breeding stages

Abstract

This study aimed to present the advancements in different breeding stages of super sweet corn (SS), from heterotic field corn populations to the single-cross of SS. Two parental field corn populations, four backcrossed SS populations, four SS intervarietal hybrids (SS-IH), eighteen SS single hybrids (SS-SCH) and two controls were evaluated in two environments over two crop years. The SS-IH and SS-SCH categories presented the highest ear yield, and SS-SCH presented the highest ear yield without husk (11.3 t ha-1). Although SS-SCH was the most productive category, it presented the lowest husk coverage quality. The ear yield and husk cover traits expressed the highest heterosis based on the midparents. The hybrid genotype categories (SS-SCH, SS-IH and controls) had the greatest ear length and diameter, as well as plant and ear height. It was possible to conclude that the techniques used to exploit heterosis are efficient in increasing SS yield but not husk coverage, since this trait requires productive parents. Single-crosses, such as LCSH-116 x LP8HS-129 and LCSH-116 x LP8HS-130, stood out as promising genotypes for registration since they recorded high husk coverage yield and quality.

Physicochemical Characterization and Mineral Composition of “UENF SD 08”: A Super-Sweet Corn Hybrid

“…"Tropical Plus® is a super-sweet corn cultivar developed by Syngenta (registered in 2005, with outstanding sweet corn production throughout the country). "UENF 506-11" is a field corn also developed at UENF that originated from the same parental populations as the "UENF SD 08" cultivar, but without the sh2 gene [10].…”

“…Although the Northern Rio de Janeiro region has arable land with potential for the development of corn cultivation, it is known that part of the corn consumed in Rio de Janeiro comes from other states. If this situation changes, it will represent another source of income for farmers in the region, since a market to absorb local production exists [9,10].…”