延桑59的选育报告

延桑59为自苏联引进延边,经长期选优育成的稚蚕、兼全龄用桑新品种.经所内外结合,进行个体选择后,于1978年决选,并先后进行所内外鉴定试验和指定试验,表现优良.经1979—1984年示范推广,明确其特征和特性以及推广价值,从初选、复选到决选共用了20年时间.其母本简化号为59—C.选育品种延桑59的主要特点是,前期生长旺盛、嫩枝较多、新梢生长快,叶形大、枝态紧凑、节间密、产叶量高、叶质优良,叶片成熟快.养蚕效果优于日本稚蚕用桑品种剑持和本省现行推广品种秋雨桑,是优良的稚蚕、兼全龄用桑品种.并具有耐伐、耐贮,适于地桑、低干速成密植桑园栽植的特点.

REPORT OF THE BREEDING OF THE NEW MULBERRY VARIETY “YAN SANG59”

YS-59 is a new variety of mulberry which was bred from the mulberry introduced from Soviet Union. Its suitable both for young and grown silkworms. Sponsored by our institute and in coorperation with some others we implemented individual selections. Eventually it was set as a final selection variety since 1978. It manifested excellent results through appraisal and assigned experiments. Through demonstration and popularization during 1979-1984 its physical characters, properties and values for extensions were affirmed. The period from the primary,secondary selection to final selections covered 20 years. The maternal plant was designated as 59-C. The main characters of this new variety possess a vigorous growth at the early stage, abundant tender branches; the tips of the trees grow quickly with big leaf blades, short inter-nodes; the leaves are of high quantity, good quality and ripe quickly. It possesses high efficacy in feeding silkworms than that of Japanese JC breed for young worms and the QY breed we are using in Jilin at present.Its an excellent variety for young and grown worms. Still its durable and easy to store and suitable for accelerate and close planting of ground trunk and low trunk mulberry fields.