全文获取类型
收费全文 | 268篇 |
免费 | 24篇 |
出版年
2021年 | 4篇 |
2020年 | 6篇 |
2019年 | 8篇 |
2018年 | 5篇 |
2017年 | 4篇 |
2016年 | 9篇 |
2015年 | 11篇 |
2014年 | 5篇 |
2012年 | 6篇 |
2011年 | 5篇 |
2010年 | 10篇 |
2009年 | 5篇 |
2007年 | 7篇 |
2006年 | 9篇 |
2005年 | 5篇 |
2003年 | 2篇 |
2002年 | 3篇 |
2000年 | 3篇 |
1999年 | 3篇 |
1998年 | 8篇 |
1997年 | 2篇 |
1996年 | 3篇 |
1995年 | 3篇 |
1994年 | 3篇 |
1993年 | 2篇 |
1992年 | 3篇 |
1990年 | 2篇 |
1989年 | 5篇 |
1987年 | 2篇 |
1978年 | 2篇 |
1977年 | 2篇 |
1976年 | 2篇 |
1974年 | 4篇 |
1972年 | 2篇 |
1971年 | 6篇 |
1966年 | 3篇 |
1965年 | 3篇 |
1960年 | 3篇 |
1959年 | 10篇 |
1958年 | 14篇 |
1957年 | 10篇 |
1956年 | 12篇 |
1955年 | 5篇 |
1954年 | 7篇 |
1953年 | 11篇 |
1952年 | 7篇 |
1951年 | 8篇 |
1950年 | 13篇 |
1949年 | 6篇 |
1948年 | 3篇 |
排序方式: 共有292条查询结果,搜索用时 0 毫秒
1.
2.
3.
4.
5.
6.
7.
8.
DUNN M. ALISON; HUGHES MONICA A.; PEARCE ROGER S.; JACK PETER L 《Journal of experimental botany》1990,41(11):1405-1413
A cDNA library was made from low positive temperature (6 ?C/2?C) grown barley shoot meristems. Several genes which are differentiallyexpressed, as measured by mRNA abundance, were selected fromthe library using a differential screen. This paper reportsan analysis of in vivo expression in several cultivars, theDNA sequence, copy number and chromosomal location of one gene(BLT14). In addition, genomic restriction fragment length polymorphismfor this gene in the 10 most widely UK-grown spring and 9 mostwidely UK-grown winter barley cultivars is analysed. Key words: Hordeum vulgare, low temperature, RFLP, differential expression, cDNA sequence 相似文献
9.
The attack by cabbage caterpillars on open-pollinated cultivars of Brussels sprouts at Wellesbourne was recorded approximately weekly from July to October in 1973 and 1974. The red-foliaged cv. Rubine was much less attacked by Pieris rapae than any of the twenty-five green-foliaged cultivars tested, the least attacked of which were The Aristocrat, Continuity, Evergreen and Pride of the Market. Rubine also showed some resistance to attack by Mamestra brassicae and Evergestis forficialis, as did The Aristocrat. Continuity, though as resistant as any of the cultivars to E. forficialis, was not resistant to M. brassicae. No evidence of antibiosis was found and resistance, based on non-preference, is considered to result from ovipositing P. rapae adults discriminating against the red colour of Rubine and against the leaf composition (relative volatile content) of the green-foliaged resistants. This could also apply with M. brassicae and E. forficialis. 相似文献