具有中国大豆遗传背景的7S与11S多亚基缺失型大豆新品系的创制

利用我国高油大豆品种东农47与日本引进多亚基缺失型育种材料日B,采用回交、三交的育种方法,综合系谱选择,通过SDS-PAGE技术分析亚基组成,在BC1、BC3及三交种F8群体内,选育到(α+11S groupⅡa)-缺失型、(α′+11S groupⅡa)-缺失型、[(α′+α)+11S groupⅡa、Ⅱb]-缺失型、[(α′+α)+11S groupⅡa]-缺失型、[(α′+α)+11S groupⅡb+X1X2]-缺失型、[(α′+α)+11S groupⅡb]-缺失型和(α′+11S groupⅠ、Ⅱa)-缺失型共7种具有中国大豆遗传背景的7S球蛋白α′、α亚基与11S球蛋白groupⅠ(A1aB1b,A2B1a,A1bB2)、groupⅡa(A4A5B3)和groupⅡb(A3B4)不同亚基缺失组合新种质。测定优良品系的综合农艺性状及氨基酸组成、含量,结果表明,与对照相比,各种缺失突变体的各种氨基酸组分含量普遍提高,蛋白总量普遍高于轮回亲本,精氨酸含量特别是游离精氨酸的含量大幅提高。其中亚基组成为(α+11S groupⅡa)-缺失型品系G2-2-3的17种氨基酸含量、氨基酸总量、蛋氨酸含量均显著高于轮回亲本东农47,特别是游离精氨酸含量高出7.27mg/g。以上结果表明,7S与11S多亚基缺失型优良品系在有效去除致敏蛋白的同时,可以提高大豆蛋白氨基酸含量,改善大豆蛋白氨基酸组分配比。各种致敏蛋白缺失型大豆优良新品系的获得,大大丰富了我国蛋白质组分改良育种的种质基础。

Stature of Han Chinese dialect groups:a most recent survey

The height of 26,940 Chinese Han adults （16,503 rural and 10,437 urban adults） from 11 Han ethnic groups was measured and analyzed in the current survey. The top three highest dialect groups in rural Han populations are Jianghuai （male 167.3± 6.4 cm, female 156.5 ±5.6 cm）, North China （male 167.3 ± 6.4 cm, female 155.7± 5.7 cm）, and Wu （male 166.7 ± 6.9 cm, female 155.6 ± 5.9 cm） groups. In urban Han populations, the top three groups are as follows： the Northeast China （male 169.5 ±6.7 cm, female 158.0 ±6.1 cm）, North China （male 168.5 ± 6.2 cm, female 157.3±5.8 cm）, and Jianghuai （male 169.2 ± 6.2cm, female 157.1 ± 5.6 cm） dialect groups. The Gan dialect group （male 164.0 ± 6.3 cm, female 153.9±5.0 cm） was the shortest in both rural and urban groups. The different stature of Han dialect groups may be a result of interaction between genetic background and different environmental factors, labor intensity, diet composition and nutrition intake in different areas in China.