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The Optimal Time for Harvesting the Seeds of Gui 39722, the Female Parent of a Maize Hybrid Guidan 0810
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作者 苏义成 文仁来 +5 位作者 田树云 苏月贵 何静丹 滕辉升 何雪银 杨萌 《Agricultural Science & Technology》 CAS 2017年第6期993-998,共6页
To determine the optimal time for harvesting the seeds of Gui 39722, which is the female parent of a newly-developed maize hybrid Guidan 0810, the cobs of Gui 39722 were harvested 31 (the first stage), 34 (the seco... To determine the optimal time for harvesting the seeds of Gui 39722, which is the female parent of a newly-developed maize hybrid Guidan 0810, the cobs of Gui 39722 were harvested 31 (the first stage), 34 (the second stage), 37 (the third stage), 40 (the fourth stage), 43 (the fifth stage) and 46 (the sixth stage) d after pollination and oven dried at 38 ~C to constant weight. Then, the 1 000-ker- nel weight, germination rate and the agronomic traits of three-leaf seedlings were measured and compared. The results showed that the seeds of Gui 39722 harvest- ed 43 d after pollination (the fifth stage) had the greatest germination rate, seedling height, vigor index, root dry weight, shoot dry weight and germination potential, and high 1 000-kernel weight (very close to the highest level), root length, number of roots per seedling and root-shoot ratio. Therefore, 43 d after pollination was the op- timal time for harvesting the seeds of Gui 39722, when the effective accumulated temperature after pollination reached 780.7 ℃ and the ear leaf dried. The seeds harvested at this stage had the highest yield and the best quality. Field sampling revealed that 89.00% to 95.00% (with an average of 91.15%) of the seedlings of six stages of seeds grew well. 展开更多
关键词 MAIZE Hybrid Guidan 0810 female parent Gui 39722 Harvesting time Seed vigor
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Effects of Different Row Ratios of Male and Female Parents and Application Amount of Nitrogen Fertilizer on Hybrid Wheat Seed Production and Its Component Factors 被引量:1
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作者 Can SUN Renwu RUAN +7 位作者 Lili YAN Dan HU Xingbei LIU Hengzhi SHE Manman XU Zhongan LI Zelin YI Yuheng YANG 《Asian Agricultural Research》 2017年第3期69-73,共5页
In order to screen suitable high hybrid wheat seed production technology,the split-plot experiment design was adopted and study was carried out about the effects of the different row ratios of male and female parents ... In order to screen suitable high hybrid wheat seed production technology,the split-plot experiment design was adopted and study was carried out about the effects of the different row ratios of male and female parents and application amount of nitrogen fertilizer on hybrid wheat seed production and its component factors. The results showed that the seed production increased with the increase in the number of female parent row. When the row ratio of male and female parents was 2 ∶ 6,the seed production was 3 683. 8 kg/ha; when the application amount of nitrogen fertilization was 50 kg/ha,the seed production was 3 649. 4 kg/ha; the interaction between the row ratio of male and female parents and the application amount of nitrogen fertilizer indicated that when the row ratio of male and female parents was 2∶ 6 and the application amount of nitrogen fertilizer was 300 kg/ha,the seed production reached the highest( 4160. 6 kg/ha). The row ratio of male and female parents and application amount of nitrogen fertilizer had significant effect on the component factors of seed production,including the number of grains per spike,spike weight and setting percentage. When the row ratio of male and female parents was 2∶ 5,the number of grains per spike,spike weight and setting percentage were the highest at 26. 7 grains,1. 12 g,and 62. 6% respectively; when application amount of nitrogen fertilizer was 450 kg/ha,the number of grains per spike,spike weight and setting percentage were the highest at 26. 0 grains,1. 08 g,and59. 2% respectively; the interaction of row ratio of male and female parents and application amount of nitrogen fertilizer had significant effect on the number of grains per spike,spike weight and setting percentage; when the row ratio of male and female parents was 2∶ 5 and the application amount of nitrogen fertilizer was 300 kg/ha,the number of grains per spike,spike weight and setting percentage were the highest at 29. 6grains,1. 24 g,and 71. 6% respectively. The number of grains per spike is the largest component factor for seed production. Increasing the number of grains per spike can increase the seed production. According to the effects of row ratio of male and female parents and application amount of nitrogen fertilizer on the component factors of seed production,the optimal condition was 2∶ 5-2∶ 6 for row ratio of male and female parents and 300-450 kg/ha for application amount of nitrogen fertilizer. 展开更多
关键词 Hybrid wheat Row ratio of male and female parents Nitrogen fertilizer Seed production
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Hardness Genetic Analysis of Pink Hard-fruit Tomato
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作者 Qingzhen YIN Liyong ZHANG +3 位作者 Guohua WANG Weiping YIN Lijuan QIE Fujiang ZHAO 《Agricultural Science & Technology》 CAS 2017年第1期35-40,共6页
Hardness genetic laws of pink hard-fruit tomato were studied for breeding new varieties of pink hard-fruit tomato. The change of hardness degree and heredi- tary characters of tomato were studied using the texture ana... Hardness genetic laws of pink hard-fruit tomato were studied for breeding new varieties of pink hard-fruit tomato. The change of hardness degree and heredi- tary characters of tomato were studied using the texture analyzer, with female parents P27, male parents P31 and tomato F1 combination 15# as the test materials. The result showed that transverse hardness was the lowest, followed by longitudinal hardness, and the hardness of fruit shoulder was the highest. The average hardness at green fruit stage was higher, the hardness at turning-color period and red ripe stage decreased significantly. The average hardness of P27, P31, F1 combination 15# at red ripe fruit was 13.27, 10.88, 12.28 N, respectively. The hardness at red fruit stage and green fruit stage had significantly positive correlation. Fruit shape index of F1 combinations 15#at red ripe stage was 0.87. The fruit shape was round with 5-6 locules. The pericarp thickness was 0.7-0.8 cm. The single fruit weight was 258 g. It was the ideal bred variety for pink hard-tomato fruit. There was no necessary connection among fruit hardness and fruit size, pericarp thickness, ventricle numbers, single fruit weight. Fruit shape index could be used as indirect selection index of the hardness of tomato. 展开更多
关键词 Tomato F1 combination female parents Male parents HARDNESS Texture analyzer HEREDITY
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