Bread wheat (Triticum aestivum L.) is a staple food for millions of people across the globe. However, due to climate change the productivity of wheat has deceased from 8-10% in many wheat growing areas in the world. The terminal heat-stress is a major abiotic factor causing grain shriveling and reduced grain yield. The test weight is employed to ascertain the grain quality in cereals while the 1000 grain weight indicates the boldness/plumpness of the grains in small seeded crops.