Tuesday, November 14, 2006
161-2
Development and Evaluation of a RIL Population for Seed Quality Improvement for Vegetable Soybean.
Shenlong Zhu1, Xuejun Fu2, Fengjie Yuan2, Ruiping Luo3, Ainong Shi3, Anfu Hou3, Baiquan Li3, Danhua Zhu3, and Pengyin Chen3. (1) Univ of Arkansas, Dept of C SES, 115 Plant Sci. Bldg., Fayetteville, AR 72701, (2) Univ of Arkansas, Dept of CSES, 115 Plant Sci. Bldg., Fayetteville, AR 72701, (3) Univ of Arkansas, 115 Plant Sci. Bldg. Dept of CSES, Fayetteville, AR 72701
A soybean recombinant inbred line (RIL) population was developed by single seed descent at the Institute of Crop Science, Zhejiang Academy of Agricultural Sciences, from the cross Zhongdou 27 ´ Tai 75. Zhongdou 27, released by Chinese Academy of Agricultural Sciences in 2000, is a food-grade cultivar with approximately 0.43% seed isoflavone. Tai 75, derived from a Japanese cv. ‘Ryokkoh’, is an elite edamame cultivar with soft seed texture, sweet flavor, but lower seed isoflavone (0.21%). The RIL population, consisting of 242 F2:8 lines, was evaluated for its agronomic and seed quality traits at two locations in 2005. Segregation was observed for plant height (15-123 cm), number of node on main stem (7 to 24), number of branch (0-10), number of pod per plant (8-151), fresh pod breadth (1.0-1.5 cm), length of 2-seed pod (3.2-5.8cm), length of 3-seed pod (4.6-7.3cm), and fresh seed hardness (7.556-13.035 kg). Analysis of seed isoflavone, starch, fiber, calcium, and sugar content is in progress, and results will be represented. The RIL population will be used for genetic mapping of seed quality traits and developing new vegetable soybean cultivars.