Seedling progeny analysis in selected cashew (Anacardium occidentale L.) types
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Date
1982
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Department of Plant Breeding, College of Agriculture, Vellayani
Abstract
Seedling progeny analysis of two different types of cashew namely Kottarakara-1 and Kottarakara-27 was done by raising nursery of seednuts collected from 30 mother trees each from the two types. The experiment was conducted at College of Agriculture# Vellayani during 1981-82.
Prom the analysis of data on mother tree characters it was found that the two types did not differ significantly in yield per tree. They differed in respect of canopy size. There was high variation between the individual trees in yield for both types The analysis of seednut characters revealed that the two types differed significantly in respect of weight and volume of nut and kernel. Kottarakara-27 was found to be superior to Kottarakara-1. This superiority of seednut characters of Kdttarakara-27 was reflected in the recovery of vigorous seedlings also The seednut characters showed positive significant correlation among themselves.
Analysis of seedling characters revealed that Kottara- kara-1 was superior to Kottarakara-27 for seedling heightnumber of leaves and. total leaf area, but Kottarakara-27 was superior for girth at collar and length of tap root.
Individual trees of both types differed significantly in the seedling characters and seedling vigour.but the three yield groups did not show any significant difference.
Kottarakara-27 was found to be significantly superior to Kottarakara- 1 in the percentage of recovery of vigorous seedlings.
In both the types the medium yielding group registered more recovery of vigorous seedlings There was no significant difference between the two types in the recovery of prepotent trees.
Correlation studies revealed that girth of trunk and seedling vigour showed significant positive correlation in Kottarakara-1. Canopy size was positively correlated with girth of trunk. Hence these two characters can be considered as important criteria for mother tree selection.
Seedling height showed significant positive correlation with most of the other seedling characters studied during the 3rd and 9th month of growth. Hence seedling height can be considered as an indication of seedling vigour.Tallest 50 per cent seedlings in the nursery can be considered as superior planting material.
Based on seedling progeny analysis prepotent trees can be identified. But adult progeny analysis is essential to confirm the above results.
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