Induced variation in tomato for heat stress condition : Isolation and characterization of mutants with high lycopene content under heat stress condition

ISBN-13: 9783659232077 / Angielski / Miękka / 2012 / 324 str.

Raja Shankar; T. A. More; S. F. D. Souza

Opis

In the present work, screened 113 germplasm lines and isolated genotypes CO3, Arka Meghali (large fruit genotypes) and EC-521038 and EC-24296 (small fruit genotypes) promising for heat stress and subjected for induced mutagenesis using gamma rays and EMS. Fixed LD50 value, at 350 Gy and 0.30% for EMS respectively. Higher frequency of chlorophyll mutants (0.60%) and viable mutant frequency (6.25%) was observed in EMS treating Arka Meghali followed by CO3 (0.35% & 5.14%). The viable mutants MC-14, MC-27, MC-20, MC-83, MC-46, MC-136, MA-41, MA-18, ME-516, ME-518, ME-12, ME-519, ME-22, ME-504, M-18, ME-217, ME-212, ME-220, ME-221, ME-230 and M-6 had larger fruit size (60 g), high yield (1900-2200g/plant) and high lycopene content (7-7.6 mg/ 100g) scoping to develop commercial varieties after attaining homogeneity in M4 and subsequent generations. The mutant MC-62 and MA-47 had high yield with yellow fruit colour, and ME-13, ME-16, ME-30, M-3 and M-23 mutants having high lycopene content with low yield potential, have bright scope for development of breeding lines for future studies related to fruit ripening mechanism in tomato.

O autorze

Shankar, RajaHe was born in a village Mullukurichi located in Namakkal of Tamil Nadu and did Ph.D in TNAU, Coimbatore. He secured ARS and working in ICAR New Delhi as Scientist. He is actively involved in vegetable crop improvement in tomato, cucurbits and drumstick. He is recipient of the Bharat Shikshak Ratan Award for his contribution in Vegetable science.