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幼苗大小及不同越冬方式对洋葱鳞茎主要商品性状的影响
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作者 相元萍 《山东农业科学》 2006年第5期35-36,共2页
对定植时不同幼苗大小、不同越冬方式的三种生态型洋葱品种,观察研究其鳞芽形成、鳞茎大小、分球及先期抽薹等相关性状。结果表明,同一生态型品种鳞茎膨大及时间,与幼苗大小和越冬方式关系不大,不同生态型间存在差异。横径较大的幼苗易... 对定植时不同幼苗大小、不同越冬方式的三种生态型洋葱品种,观察研究其鳞芽形成、鳞茎大小、分球及先期抽薹等相关性状。结果表明,同一生态型品种鳞茎膨大及时间,与幼苗大小和越冬方式关系不大,不同生态型间存在差异。横径较大的幼苗易受气温的影响,会出现分球或先期抽薹现象。 展开更多
关键词 幼苗大小 越冬方式 鳞茎 商品性状
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Molecular Dissection of Relationship Between Seedling Characteristics and Seed Size in Rice 被引量:8
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作者 崔克辉 彭少兵 +2 位作者 邢永忠 余四斌 徐才国 《Acta Botanica Sinica》 CSCD 2002年第6期702-707,共6页
Seedling characteristics such as leaf emergency, chlorophyll content, and height are important for early growth and also associated with seed size. Quantitative trait loci (QTLs) for rice (Oryza sativa L.) seedling ch... Seedling characteristics such as leaf emergency, chlorophyll content, and height are important for early growth and also associated with seed size. Quantitative trait loci (QTLs) for rice (Oryza sativa L.) seedling characteristics (leaf length, chlorophyll content, seedling height) and seed size were identified with an attempt to explore the relationship between seedling characteristics and seed size, using a recombinant inbred population derived from a cross between Zhenshan 97A and Minghui 63. Two, one, five, four, four, and nine QTLs were detected for chlorophyll a content, total chlorophyll, length of the second seedling leaf, length of the third seedling leaf, seedling height, and seed size, respectively. The results indicated that four QTLs for seed size and four QTLs for seedling characteristics shared several similar regions (G359-RG532, C567-RG236, RZ403-R19, C371-C405a), respectively, suggesting a close association between seedling characteristics and seed size. Several chromosomal regions influencing seed size, however, had no effects on seedling characteristics, suggesting that it was possible to improve seedling vigor without increasing grain size. 展开更多
关键词 QTL mapping seedling characteristics seed size RICE
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Effect of Seed Sizes on the Growth and Establishment of Seedlings of Sheanut Tree (Vitellaria paradoxa)
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作者 G.O. Kolawole K. A. Adebayo M. A. Adebayo 《Journal of Agricultural Science and Technology》 2011年第4期428-432,共5页
Seed size can influence germination, emergence and further development of plants to produce high yield. Therefore, pot trial was conducted to assess the effects of seed sizes on growth and establishment of sheanut tre... Seed size can influence germination, emergence and further development of plants to produce high yield. Therefore, pot trial was conducted to assess the effects of seed sizes on growth and establishment of sheanut tree seedlings (Vitellaria paradoxa) in tlae southern Guinea savanna of Nigeria. Seedlings produced from large sized seed had higher germination (80%) than those from medium (70%) and small (65%) sized seeds. Number of days to emergence of seedling from large-sized seed planting was 30 days, 49 days for small- and medium-sized seeds. Large sized seeds had higher N, P, K, Ca and Mg contents compared with small and medium sized seeds. Generally, seedlings from large sized seeds had about 1.5 times more leaves than medium sized seeds and about 2 times more leaves than small sized seeds at 8, 10, 12, 14 and 16 weeks after planting (WAP). Seedlings from large sized seeds were taller and had larger stem girth (at 16WAP) than those from medium sized seeds. Variations in seedling growth from seed sizes could be of operational importance in nursery management as seeds can be sown according to size to improve uniformity. However, further studies to ascertain if the superior growth of seedlings from large sized seeds will lead to higher yield is recommended. 展开更多
关键词 GROWTH nutrient content plant height seed size sheanut tree Nigeria.
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Investigation of Variability in Seed Size on Seedling Establishment of Buchholzia coriacea Engler
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作者 A. O. Akinyele A. O. Adegeye 《Journal of Agricultural Science and Technology(B)》 2011年第4期566-572,共7页
Investigation was carried out on the significance of seed size on morphological traits in seedlings of Buchholzia eoriaeea Engler, a medicinal plant in Southwestern Nigeria. Three size classes-large (seeds 〉 40 g),... Investigation was carried out on the significance of seed size on morphological traits in seedlings of Buchholzia eoriaeea Engler, a medicinal plant in Southwestern Nigeria. Three size classes-large (seeds 〉 40 g), medium (seeds between 25 and 40 g) and small (seed 〈 25 g) were used. Ninety uniformly growing seedlings from each size class were assessed for shoot height, number of leaves, collar diameter, leaf area and biomass production for six months. Seed size showed significant effect on height growth, collar diameter and number of leaves (P 〈 0.05). Seedlings from large seed size class had the best height and collar diameter (45.3 cm, 8.7 mm). Seeds of large and medium seed size classes had overall means of 15.6 and 15.5 leaves/seedling respectively. Leaf dry weight, stem dry weight and root biomass in seedlings from the three seed size classes were significantly different at P 〈 0.05 with the highest mean values for leaf dry weight, stem dry weight and root biomass recorded by seedlings from the large seed size class. The results showed that seed size has great influence on seedling growth when they are young. With availability of sufficient nutrient and light, effect of seed size on seedling growth and development could disappear as seedlings attain maturity. 展开更多
关键词 Buchholzia coriacea medicinal plant morphological traits seed size.
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