甜菜多系杂交种甜研八号的选育

Breeding of Multiling Sugarbeet Hybrid Tianyan 8

甜研八号是以ＫＨ为骨干系，与４个自交系按４∶１（自交系等量）配制的多系自然杂交组合（代号ＫＨ－５），生产上利用一代杂交种。１９９１～１９９５年参加全国１３个网点区域试验和４个点两年（１９９４～１９９５年）的生产试验，平均根产量为４２６３８．６ｋｇ／ｈｍ２和４３７８２．０ｋｇ／ｈｍ２，前者比对照增产９．０％，后者与对照持平（－０．１％），平均含糖率为１６．６％和１６．１％，比对照提高１．３２度和１．３５度，平均产糖量为７１０１．９ｋｇ／ｈｍ２和７００３．７ｋｇ／ｈｍ２，比对照增产２２．９％和９．５％；１９９３～１９９７年参加黑龙江省１０个点区域试验和６个点两年（１９９６～１９９７年）的生产试验，平均根产量、含糖率和产糖量分别比对照提高１０．２％和２７．８％、０．８度和０．６４度、１８．５％和３４．９％。抗褐斑病和根腐病，较对照低０．８级，根腐病罹病率５．５％，亦较耐立枯病和丛根病。适宜在黑龙江省的佳木斯、齐齐哈尔、哈尔滨、大庆，内蒙古的中部、东部，宁夏的银川，甘肃的黄羊镇，新疆的石河子、和静等地种植。

Tianyan 8 crossed with KH main line and 4 selflines which according to 4∶1(selflines with equivalent amount), this combination coded KH-5. F1 used in the production. This variety have tested in the national test with 13 locations in 1991～1995,and tested in demonstration with 4 locations in 1994～1995 . Root yield 42638.6kg/hm2 (average) and 43782.0kg/hm2,the 1st one compared with CK have increased 9.0% and 2nd one with balance(-0.1%), with sugar content 16.6% and 16.1%, compared with CK higher 1.32% and 1.35%, sugar yield 7101.9kg/hm2 and 7003.7kg/hm2 increased 22.9% and 9.5% than CK. In 1993～1997, it has tested in 10 locations of Heilongjiang province and demonstration in 1996-1997 with 6 locations, sugarbeet root yield, sugar content and sugar yield have increased 10.2%,27.8%;0.8% and 0.64%; 18.45% and 34.9% than CK,it resistant to leafspot and root rot, DI lower 0.8 scale and 5.5% root rot than CK, tolerant to damping-off and Rhizomania. It can be grown in Jiamusi, Qiqihar, Harbin, Daqing, Central and east part of Inner Mengolia, Ningxia, Gansu, Xinjiang etc.