Breeding and feeding quality analysis of a new soybean strain deficient in Kunitz trypsin inhibitor

doi:10.11686/cyxb2019547

Abstract

Abstract: As a source of feed protein, soybean contains rich nutritional components, but also have trypsin inhibitors that affect protein digestibility and absorption. Through conventional breeding and Native-PAGE molecular assisted breeding technology, a new soybean strain ‘HZ8009’ deficient in Kunitz type trypsin inhibitors was selected, with Hefeng50 as the female parent and Zhonghuang16 as the male parent. The new soybean strain HZ8009 is suitable for cultivation in Heilongjiang Province and has a maturity time of 120 days. The plant is tall with luxuriant foliage and an indeterminate podding habit. The protein content of the seed is 42%, and the fat content is 20%. The feed nutritional value of advanced generation strain was analyzed using feed quality testing technology. Hay yield was 21.39% greater and the dry matter crude protein content was 3.92% greater than for Mudanjiang fodder soybean. The best cutting period was from flowering to podding. The new soybean strain HZ8009 has a high protein content and high crop biomass, indicating wide potential for use as a forage resource.

Key words: soybean, Kunitz trypsin inhibitor, nutritive value

JIANG Yan, XUE En-yu, LU Wen-cheng, CUI Guo-wen, LI Yuan-ming, HAN Tian-fu, WANG Shao-dong. Breeding and feeding quality analysis of a new soybean strain deficient in Kunitz trypsin inhibitor[J]. Acta Prataculturae Sinica, 2020, 29(10): 91-98.

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