依据ITS rDNA序列探讨我国盾腹虫属种类的系统发育关系(英文)

盾腹吸虫为寄生扁形动物中一小的类群。我国已报道7种盾腹吸虫,其中5种隶属于盾腹虫属(Aspidogastridae,Aspidogastrinae)。研究测定了在我国采集到的4种盾腹虫属吸虫的核糖体DNA转录内间隔区(ITSrDNA)序列,并分别采用邻接法和最大似然法构建分子系统发育树。结果显示,这4种盾腹吸虫的ITS-1和ITS-2序列的长度分别在728—877bp和518—645bp之间,其G+C含量分别在50.1%—52.3%和49.2%—52.2%范围内。4种盾腹吸虫的种间遗传距离在0.2%—2

飼料用水稲新品種「ホシアオバ」の育成

We developed a lowland rice cultivar, "Hoshiaoba", at National Agricultural Research Center for Western Region in 2002. We selected this cultivar from the pedigree of crossing between Hokuriku 130 (Oochikara) and Tashukei 174. Oochikara is a high yielding cultivar with large grain and Tashukei 174 is a high yielding breeding line of long culm and good plant statue. Crossing was carried out in 1987 and the promising progeny line was named as Chugoku 146 at F_9 generation in 1995. Chugoku 146 had been subjected to local adaptability tests and feed tests for livestock since 1996. Chugoku 146 was recognized to be suitable for whole crop silage from its yielding, and feeding value. It was officially registered as Paddy rice Norin No.379 and named Hoshiaoba by the Ministry of Agriculture Forestry and Fisheries (MAFF) in 2002. The main characteristics of Hoshiaoba are as follows. 1. Heading date of Hoshiaoba is similar to that of Nipponbare, but its maturing date is 6 days later than that of Nipponbare. Its maturity is classified into medium maturity in the western region of Japan. Its lengths of culm and panicle are 3cm and 4cm longer than those of Nipponbare, respectively. The panicle number per unit area is less than that of Nipponbare, and the plant type is super-heavy panicle type. The culm is thick and hard. Shuttering habit is slightly hard. 2. Hoshiaoba seems to be possessed of the true resistance genes Pita-2 and Pib for blast disease. Its field resistances for leaf blast and for panicle blast are unknown. The resistance level to bacterial leaf blight is similar to that of Nipponbare, and Hoshiaoba is resistant to rice stripe disease. The lodging resistance of Hoshiaoba is superior to Nipponbare. 3. Its yielding abilities as whole crop and as grain under transplanting cultivation are about 12% and 30% superior to those of Nipponbare, respectively. Under direct seeding cultivation tests, its yielding ability is superior to that of Nipponbare. 4. The volume of brown rice of Hoshiaoba is very large, its 1000 kernel weight is about 29g. Its appearance grade of brown rice is remarkably inferior to that of Nipponbare and eating quality of Hoshiaoba is also remarkably inferior to that of Nipponbare. 5. Total digestible nutrients (TDN) content per dry matter weight of Nipponbare is about 60%, it is similar to that of Nipponbare. However, dry matter weight of Hoshiaoba is superior to that of Nipponbare. The whole crop silage of Hoshiaoba is similar to timothy hay in feed ingredients, and its feeding value for cow seems to be equivalent to timothy hay

飼料用水稲新品種「クサノホシ」の育成

We developed a lowland rice cultivar, "Kusanohoshi", at National Agricultural Research Center for Western Region in 2002. We selected this cultivar from a cross between Tashukei 175 and Akenohoshi. Akenohoshi is a high yielding cultivar with numerous setting of grain per each panicle and Tashukei 175 is a high yielding breeding line of long culm and good plant statue. Crossing was carried out in 1987 and the promising progeny line was named as Chugoku 147 at F_8 generation in 1995. Chugoku 147 had been subjected to local adaptability tests and feed tests for livestock since 1996. Chugoku 147 was recognized to be suitable for whole crop silage from its yielding, and feeding value. It was officially registered as Paddy rice Norin No.380 and named Kusanohoshi by the Ministry of Agriculture, Forestry and Fisheries (MAFF) in 2002. The main characteristics of Kusanohoshi are as follows ; 1. Heading date of Kusanohoshi is 13 days later than that of Nipponbare. Its maturity is classified into late maturity in the plain area along Seto Inland Sea. Its lengths of culm and panicle are longer than those of Nipponbare. The panicle number per unit area is less than that of Nipponbare, and the plant type is superheavy panicle type. The culm is thick and hard. Shuttering habit is hard. 2. Its yielding abilities as whole crop and as grain under transplanting cultivation are about 20% and 30% superior to those of Nipponbare, respectively. Under direct seeding cultivation tests, its yielding ability is superior to that of Nipponbare. 3. Kusanohoshi seems to be possessed of the true resistance genes Pita-2 and Pib for blast disease. Its field resistance for leaf blast and for panicle blast are unknown. The resistance level to bacterial leaf blight is high and Kusanohoshi is resistant to rice stripe disease. The lodging resistance of Kusanohoshi is superior to Nipponbare. 4. Total digestible nutrients (TDN) content per dry matter weight of Kusanohoshi is about 60% by nearinfrared spectroscopic analysis, it is similar to that of Nipponbare. As its higher whole crop yield, the TDN yield per unit area (TDN content × whole crop yield) of Kusanohoshi is superior to that of Nipponbare. 5. Its appearance grade of brown rice is inferior to that of Nipponbare and eating quality of Kusanohoshi is also inferior to that of Nipponbare