However, in some important crops like cotton, no commercially viable cultivars have been bred with sufficient resistance against black root rot. Interestingly, in Australia, researchers have identified diploid cotton species displaying marked resistance against black root rot, yet cross-breeding these traits into viable commercial crops has proven to be difficult. Similarly, researchers in Poland have uncovered innate disease resistance in the germplasm of a wild-type relative of Nicotiana tabacum called Nicotiana glauca.
This is true for certain key crops such as cotton, where no commercially viable cultivars have been developed with sufficient immunity against black root rot. Interestingly, Australian researchers have found diploid cotton species displaying notable resistance to black root rot, yet cross-breeding these traits into commercially viable crops has proven challenging. Similarly, Polish researchers have discovered innate disease resistance in the germplasm of a wild-type relative of Nicotiana tabacum called Nicotiana glauca.