Potential of wild germplasm for increasing yield of grain sorghum uri icon

abstract

  • Sorghum (Sorghum bicolor (L.) Moench) backcross populations containing 3 to 50% wild germplasm were evaluated in south central India for grain yield and nine related traits. No individual BC0F2- to BC2F2-derived lines were high transgressive segregates for grain yield. Only 1.5% of all BC3F2- or BC4F2-derived lines were transgressive segragates, with 26% higher mean grain yield than their respective recurrent parents. The ten highest-yielding BC2F2- to BC4F2-derived lines per mating having parent CK60B yielded an average of 14% more than CK60B, which was, at the 5% level, a statistically significant difference. However, the increased yield was associated with increased plant height. The highest-yilding lines from RS/R/A2725 x virgatum and RS/R/A2725 x verticilliflorum were an average of 13.5% higher-yielding than RS/R/A2725 (a significant difference) and were equal in plant height. Selection increased BC2 mean grain yields by 6 to 27%. Population mean yield, mean yield of selected lines, and frequency of high-yielding lines were highest in the BC4

publication date

  • 1984
  • 1984