桑树新品种9002的选育

A Preliminary Report on the Development of New Mulberry Variety——9002

以 770 7作母本 ,新一之濑作父本 ,采用人工有性杂交 ,单株选择 ,系统选育 ,农村栽植饲养鉴定 ,育成桑树新品种 90 0 2。与对照湖桑 3 2号相比 ,公顷桑叶产量高 ,万头蚕产茧量高 ,农村栽培饲养结果公顷桑产叶量高 ,抗桑萎缩病强 ,对桑蓟马的抵抗能力较强 ,扦插繁殖较容易 ,生长势旺 ,农艺性状优良 。

New mulberry tree variety, 9002, was developed through the breeding processes of artificial sexual hybridization(7707 x Xinyizhilai), single-plant and pedigree selection and regional test. In the experiment, 9002 gave 37.6% higher annual leaf yield, 3.6% higher cocoon shell weight per 10000 silk worms as compare with the control variety——Heyebai. In regional trial, the annual leaf yield and cocoon shell weight per 10000 silkworm of 9002 were 14.5% and 4.0% higher than the control variety. The variety was easy to multiply by cutting and to have desirable agronomic characters and wide adaptation.