河南夏大豆区近30年主要大豆品种产量改良的遗传进展.pdf

作物学报 ACTA AGRONOMICA SINICA 2016, 42(7): 10091015 / ISSN 0496-3490; CODEN TSHPA9 E-mail: xbzw@ DOI: 10.3724/SP.J.1006.2016.01009 河南夏大豆区近30 年主要大豆品种产量改良的遗传进展 黄中文 徐新娟 王 伟 梅沛沛 / , 453003 : , 30 18 , –2 , , 17.39 kg hm , 0.7%; , , , , 3 , , 3 , ; , : ; ; ; Genetic Gain of Soybean Breeding for Yield in Henan Summer Soybean Zone over the Last 30 Years HUANG Zhong-Wen, XU Xin-Juan, WANG Wei, and MEI Pei-Pei School of Life Science and Technology, Henan Institute of Science and Technology / Collaborative Innovation Center of Modern Biological Breeding of Henan Province, Xinxiang 453003, China Abstract: High yield is a main objective in soybean breeding. This study aimed at guiding soybean breeding by understanding genetic gain of yield and its related traits. 18 soybean cultivars randomly selected from cultivars released in Henan province dur- ing the last 30 years were evaluated in two years. The results showed an increasing trend of yield with the average annual rate of 0.7%, and the genetic gain was 17.39 kg ha–1 . Effective branch number, node number of main stem, seed weight, and plant height showed a positive genetic gain, whereas pod number per plant and seed number per pod showed a negative genetic gain; however, these genetic gains we