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首页> 外文期刊>Acta Horticulturae >Production of F sub 1 /sub hybrid papaya seed in Malaysia.
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Production of F sub 1 /sub hybrid papaya seed in Malaysia.

机译：马来西亚生产F 1 杂交木瓜种子。

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The 'Frangi' papaya is a F1 hybrid developed by the Malaysian Agrifood Corporation Berhad (MAFC) from hybridization between 2 inbred parents 'LSGC1' and 'LSGC2'. The seed production plot is located at Lanchang, Pahang which is about 100 km east of Kuala Lumpur. This so called 'Lanchang Seed Garden' occupies an area of 1 ha and in May 2007, 1800 trees of 'LSGC1' and 600 trees of 'LSGC2' inbred parents were planted. The trees flowered two months later and hybridization work was then started. Freshly dehisced anthers from 'LSGC2' (paternal parent) hermaphrodite flowers were collected in glass vials and used for pollination of 'LSGC1' (maternal parent) flowers. The recipient flower must be mature, but the corolla tube must remain folded to prevent accidental outcrossing. To effect pollination, the closed petals of the recipient female flower are gently separated to expose the stigma. One anther is picked up from the vial with a pair of curved-tipped forceps and gently rubbed onto the stigma of the 'LSGC1' flower. A wax paper envelope is then placed over the pollinated flower. Both female and hermaphrodite flowers of 'LSGC1' were used for hybridization and in the latter, emasculation by peeling off the corolla tube with its attached stamens is necessary to prevent self-pollination. Female flowers used in hybridization have the advantage of obviating emasculation and the fruit carries more seed compared with hermaphrodite, but its seed will bear a higher percentage of female trees that is not usually preferred. Reciprocal crosses using 'LSGC2' as maternal parent were also experimented with. 'LSGC1' as maternal parent produced fruit that was nearly twice the weight of 'LSGC2' and concomitantly the seed number per fruit was also doubled (245 vs. 121 seed). However, 'LSGC2' yielded 50% more fruit than 'LSGC1' and this accounted for a net 36% higher seed based on per tree basis. Over 18 months, 'LSGC1' and 'LSGC2' produced 15,042 and 20,510 seeds/tree, respectively. Field trials of F1 hybrids from direct and reciprocal crosses showed that there were no significant differences in performance. Hence, 'Frangi' seed production currently uses a 2-way cross. Seed harvest began in December, 2007 and rose to a peak of 90 kg in February, 2009. The trees after 18 months were too tall for hybridization and the seed garden was replanted after two years of seed production.
机译：“ Frangi”木瓜是马来西亚农业食品公司Berhad（MAFC）通过2个近交亲本“ LSGC1”和“ LSGC2”之间的杂交而开发的F 1 杂种。种子生产地位于彭亨州兰昌市，距离吉隆坡以东约100公里。所谓的“兰场种子园”占地1公顷，2007年5月，种植了1800棵“ LSGC1”和600棵“ LSGC2”近交亲本。树木在两个月后开花，然后开始杂交工作。将来自“ LSGC2”（父代）雌雄同体花的新鲜开裂的花药收集在玻璃小瓶中，并用于“ LSGC1”（父代父本）花的授粉。接受者的花必须是成熟的，但花冠管必须保持折叠以防止意外的异形交配。为了进行授粉，将收件人雌花的闭合花瓣轻轻分开以暴露柱头。用一对弯曲的镊子从小瓶中取出一个花药，然后轻轻擦在“ LSGC1”花的柱头上。然后将蜡纸信封放在已授粉的花朵上。 “ LSGC1”的雌雄花和雌雄同体花都用于杂交，在后者中，通过剥去花冠管及其雄蕊来去雄以防止自花授粉是必需的。与雌雄同体相比，杂交中使用的雌花具有消除去雄的优势，并且该果实携带的种子更多，但其种子将具有较高百分比的雌树，通常不优选。还使用“ LSGC2”作为母本进行了倒数杂交。作为母本的'LSGC1'产生的果实重量几乎是'LSGC2'重量的两倍，因此每个果实的种子数也增加了一倍（245对121种子）。但是，'LSGC2'的果实比'LSGC1'的果实多50％，按每棵树计算，这比种子净高36％。在18个月的时间里，“ LSGC1”和“ LSGC2”分别产生了15,042和20,510颗种子/树。从直交和倒交杂交获得的F1杂种的田间试验表明，性能没有显着差异。因此，“ Frangi”种子生产目前使用2向杂交。种子收获始于2007年12月，到2009年2月达到90千克的峰值。18个月后的树木过高，无法杂交，种子生产两年后重新种下了种子园。

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    《Acta Horticulturae》 |2014年第1022期|共4页
  • 作者

    Adlina Z.;

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