The Influence Of Spring And Summer Sowing On Growth Period Of Different Soybean Germplasms And The Primary QTL Mapping Of The Petiole Length In Soybean

The growth period and plant type play an important role in the yield of soybean.In this article,the impact sowing data to the growth period of soybean was studied.The phenotype of petiole length of soybean and primary QTL mapping were carried out at the same time.A number of 67 soybean germplasms,consisting of 57 internal ones and 10 foreign ones,were sowed in spring and summer respectively.The results showed that compared with the original growth period,as to the germplasms sowed in spring,the growth periods of 16 germplasms got shorter,12 germplasms varied < 5 d,and 39 germplasms became longer.The biggest reduction in growth period of 33 d occurred in germplasm Suinong 6,and the biggest increase in growth period of 54 d occurred in germplasm Panshidou.Compared with the original growth period,as to the germplasms sowed in summer,the growth periods of 27 germplasms got shorter,28 germplasms varied < 5 d,and 12 germplasms became longer.A significant reduction of growth period of 55 d happened in germplasm Jiyu 30.Averagely,the growth periods of germplasms sowed in summer were shorter than those of germplasms sowed in spring,because the germplasms sowed in summer possessed a shorter period at the flowering and podding stages.In term of accumulated temperature,the soybean sowed in summer averagely needed less than those sowed in spring.The reduction of need for accumulated temperature for soybean sowed in summer mainly occurred during a period between flowering and podding stages.Two introgression lines varied significantly in petiole length were used as parents to construct the mapping population to locate the petiole length QTL.By analysing the phenotype and genotype data in F2 population,soybean length related QTL gene was located on chromosome 2,D1 b linkage group,and linked with SSR marker Satt290(LOD2.66).