Santhy Kalyan

Santhy Kalyan |Clyto Access

Central Institute for Cotton Research, India



Biography: Dr (Mrs.) Venoor Santhy is currently working as a Scientist in Central Institute for Cotton Research, Nagpur, Maharashtra, India. She has done her PhD in Seed Science and Technology.


Title: Exploring alternate traits of Seed Vigor in cotton

Abstract: Superior germination and healthy seedling determine successful crop stand in the field. Selection of seeds with higher index and size is therefore practiced in routine breeding strategies. A good plant stand in cotton is not dependant on seed index alone but also its inherent ability to withstand various stresses in the field. ISTA has indeed suggested Accelerated Ageing and Cold test as standard vigor test for cotton seed, but requires availability and maintenance of controlled conditions. There is a need to determine alternate genetic traits which determine vigor in cotton. Some of the promising traits studied by cotton researchers all over the world include tolerance to seedling blight, days to true leaf formation, lateral root growth, oil and protein content etc. Our studies revealed traits such as tolerance towards 30% methanol (when pre-soaked for 2 hours), tolerance towards 20% Poly Ethylene Glycol and efficiency of utilizing seed reserves calculated by standard formula (Seed Reserve Utilization Efficiency) as promising traits which needs to be explored. Seeds of 15 varieties of G. arboreum consistently performed well with above 70% germination even after subjecting to methanol stress as well as PEG stress compared to those of G. hirsutum which showed less than 30% germination. Similarly, seeds of 15 G. arbroeum varieties showed consistently higher values for reserve utilization efficiency, with a narrow range of 0.6 – 0.7 mg/mg reserve. Seeds of G. herbaceum, diploid cotton, also showed higher Seed Reserve Utilization Efficiency (0.4mg/mg reserve) than those of G. hirsutum (16 varieties showed a wide range of 0.1 – 0.5mg/mg reserve). The least efficiency was observed in seeds of G. barbadense (0.1- 0.2mg/mg reserve). Within species, the trait showed significant variation and no positive correlation with seed index. The seeds of diploid species are also known to have better longevity and stress tolerance. The need to study biochemical and molecular basis of above traits is emphasized.

Related Conferences :

Agriculture and Crop Science Conference - Series 2