|ZHANG, LINGXIAO - Mississippi State University|
Submitted to: American Society of Agronomy Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 6/28/2010
Publication Date: N/A
Technical Abstract: The maturity group (MG) IV soybeans are adapted to the Early Soybean Production System in Mississippi and Midsouth U.S.A. However, seed quality, including shattering, is still a major problem associated with this system. Previous study indicated that seeds of most MG IV soybean varieties planted at late April can stay in the field before harvesting for approximately three weeks before serious shattering occurs. Field experiments continued at the Delta Research and Extension Center, Stoneville, MS, with 80 and 134 varieties in 2008 and 2009, respectively. Results indicated that the maturity date, partially influenced by planting date, was critical and associated with shattering. Late planting of soybean MG IV varieties resulted in less shattering compared with those planted earlier. Early MG IV soybean varieties matured in early September delaying shattering up to five weeks or longer. The study on the physiological mechanism on how planting date affects seed shattering of MG IV soybeans and its seed quality in MS will be continued in 2010 and results will be presented.