Genetics of inheritance of gynoecy, fruit ridge pattern and validation ofSNP marker linked to gynoecy in bitter gourd (Momordica charantia L.)

An experiment was conducted to study the inheritance of gynoecy and fruit ridge pattern of bitter gourd fruits during 2018–2021. The results revealed that a recessive gene is responsible for expression of gynoecy, and single dominant gene is responsible for expression of discontinuous ridge pattern in both the crosses (IIHRBTGy-491×IIHR Sel-19-1 and IIHRBTGy-491×IIHR Sel-78-4). GTFL-1 SNP marker differentiated between the gynoecious and monoecious lines. The SNP marker showed a clear polymorphism between gynoecious parent (IIHRBTGy-491) and monoecious parents (IIHR Sel-19-1 and IIHR Sel-78-4) giving a 392 bp band in monoecious parents and F1, but in gynoecious parent, it was not amplified indicating the dominant behaviour of the marker.