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In vitro response of certain Cashew germplasm

机译：某些腰果种质的体外反应

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摘要

Cashew (Anacardium occidentale L.) is a highly prized horticultural crop. It is a woody perennial tree of tropical origin and is being cultivated in India, Brazil and African countries. In India it is grown in an area of 7 lakh ha with production of3.6 lakh MT with an average productivity of 740 kg / ha and has earned a foreign exchange worth Rs. 1338 crores during the year 1997-98 (Thimmappaiah and Samuel 1999). The existing plantation in India, however, are showing a trend of gradual decline inproductivity. Moreover, the yield is not satisfactory and difficult to forecast each and every year. One of the serious limitation in Cashew production is that like many other tree plantation crops, Cashew is also an extremely heterozygous and out breeding (cross pollinated) crop. Moreover, the plantations are of mostly non descripty seedling origin. Hence, existing area with Cashew Plantation needs to be replanted with clonal material of elite lines to boost the production. The production of clonal stocks in large scale is limited, even through vegetative production techniques such as air-layering, veneer grafting, budding and epicotyl grafting are available.
机译：腰果（Anacardium occidentale L.）是一种非常珍贵的园艺作物。它是一棵多年生木本的热带植物，正在印度，巴西和非洲国家种植。在印度，它的种植面积为70万公顷，产量为36万吨，平均生产力为740公斤/公顷，已赚取了价值卢比的外汇。在1997-98年间，有1338亿卢比（Thimmappaiah和Samuel，1999年）。但是，印度现有的人工林显示出生产力逐渐下降的趋势。而且，产量不令人满意，并且每年难以预测。腰果生产的严重限制之一是，与许多其他人工林作物一样，腰果也是一种高度杂合和过育（交叉授粉）的作物。而且，这些人工林大多是非描述性的幼苗起源。因此，腰果种植园的现有区域需要重新种植优良品系的克隆材料以提高产量。即使通过无营养的生产技术（例如空气分层，单板嫁接，出芽和上胚轴嫁接）也可以大规模生产无性系种群。

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