Pooja Sahu

Establishment of optimum desired plant stand with recommended seed rate has been experienced as a major problem with soybean attributing to the poor seed longevity resulting lesser field emergence. Seed longevity is an inherited problem in subtropical hot and humid region. At physiological maturity the seed reaches its maximum potential for germination and vigour. This potential is short-lived and germination is often reduced prior to planting time. Genotypes of soybean exhibit significant variation for potential longevity of the seeds. Four SSR markers (satt538, satt600, satt434 and satt285) have been reported to be significantly associated with seed longevity in soybean. Seed coat permeability and electrolyte leaching associated with SSR markers satt434, satt538, satt281, satt598 negatively influenced the longevity. Longevity of the seed negatively associated hard seededness, a quantitative trait influenced by several major QTLs and associated with SSR markers. SSR locus soyPRPI with marker satt264 is associated with seed coat cracking. SSR markers sat_167 and sat_243 located are associated with tocopherol content with a defined role in seed longevity. Source of resistance, effective association of markers, genetics, for use of available information to combat the problem is discussed.

Pages: 3107-3111  |  157 Views  62 Downloads