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|Authors:||PACHANKAR, PRAMOD BHALCHANDRA|
|Title:||SYSTEMATICS OF POMEGRANATE (Punica granatum L.) CULTIVARS|
|Publisher:||MAHATMA PHULE KRISHI VIDYAPEETH, RAHURI-413 722, DIST. AHMEDNAGAR Maharashtra State (India)|
|Abstract:||The present investigation "Systematics of pomegranate (Punica granatum L.) cultivars" was carried out during 1997 and 1998 in three cropping seasons namely, mrig bahar of 1997, hasta bahar of 1997 and ambia bahar of 1998. The objectives were to describe the pomegranate cultivars, to prepare a key, to develop a good elaborate descriptor, and to measure and classify the affinity among cultivars of pomegranate. It consisted 59 cultivars. Observations in respect of the various morphological characters of the organs such as shoot, leaf, hermaphrodite and male flower, fruit, aril, juice and seed, as also in respect of tree habit and flowering were recorded. In all, total of 118 characters comprising of 55 qualitative and 63 quantitative characters were studied. Of these, 48 qualitative and 48 quantitative characters were employed for numerical taxonomy. To use a character for statistical calculations of numerical taxonomy, the character states were coded on 1 to 9 scale. Two measures of numerical taxonomy (distance and correlation cluster analysis, and principal component analysis) were used to quantify the relationship among OTUs (Operational Taxonomic Units). The unweighted pair group method (UPGM) of clustering was used to graphically summarise the results. The distance and correlation scatter diagrams were also attempted. On the basis of 118 characters, a mode of cultivar description has been given with actual description of three cultivars as the elucidation for describing the remaining cultivars. Forty-two characters of pomegranate were newly introduced in the present study for the first time. For identification of 12 leading commercial Indian cultivars, a key has been prepared. In pomegranate no standard descriptor is available. The volume of work was thought to be adequate to develop a descriptor, and accordingly the descriptor has been given. The distance and correlation coefficient matrices show the relationship of each cultivar to the rest of the cultivars. The dendrograms were found to mask certain information. The pairs of cultivars viz., Yercaud and Yercaud HRS; Coimbatore White and Kabul; A.K. Anar and Dorsata Malas; Damani Poona and Dorsata Malas; and A.K. Anar and Damani Poona showed highest mutual resemblance. The cultivars Yercaud and Yercaud HRS were found almost identical as these have shown the maximum affinity, while A.K. Anar and Alandi were found to be the extreme types of cultivars having minimum similarity. The group of cultivars viz., Damani Poona, Dorsata Malas, A.K. Anar, Siah Shirin, Speen Danedar and Hybrid No. 19/3 formed separate group from other cultivars. All the five pomegranate hybrids developed by Dr. Karale and Dr. Desai of Rahuri and included in the present study belong to one natural group, except hybrid No. 19/3. The cultivars of exotic origins appeared to belong to three natural groups of related OTUs. The cultivar Muskat and the subsequent selection from it viz., P-13, P-16, P-23, P-26 formed another group in the distance dendrogram; while in correlation dendrogram, these cultivars fall divided into two groups. The cultivar Kabul Yellow having distinct characters, appeared separate and did not belong to any group at lower distance. Principal component analysis was found useful and informative. It provides certain information that was not apparent in the dendrograms. Scatter diagrams were found to be equally suitable in the classification of variability. The technique of cluster analysis using distance coefficients seems to be useful tool for classification of the pomegranate cultivars in a natural way.|
|Appears in Collections:||Thesis|
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