14 Mar Seed Production of Seedless (Triploid) Watermelon
बीजरहित (र्ट्राईपोड) तरबूज का बीज उत्पादन कैसे करें The credit of production of seedless watermelon goes to Japanese scientists. Kihara (1951) who gave an exceptionally clear account of various steps in production of triploid fruits. The triploids are the resultant of a cross of tetraploid and diploid parent. The steps involved in triploid seed production are: (i) Production of parental line (Tetraploid and diploid): Application of colehicine 0.2 % to 0.4% to growing points of young seedlings at 1 to 2 true leaf stage for 2 to 3 days sueecssively to induced tetraploids (44 chromosomes). The treatment is given under controlled conditions avoiding direct sunlight. The terminal growth will be slow and promoted carefully. The tetraploid plants are characterised by broad thick leaves and bigger pollen grain and at flowering pollen fertility and pollen size be tested. The seeds will be broad and bigger. Fermentation method of seed extraction to be avoided and tetraploid seed should be soaked ovenight before sowing. The maintenance of tetraploid lines at stable level is important and continous selection for improvement of quality and vigour in tetrapolid lines has to be done for atleast 4-5 generation. The seed of diploid line is produced in isolation.(ii) Seed Production of Tripliod (3x): Triploid seed are produced by two ways :(a) Hand...