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M. Sc. Dissertations

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20162
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Subject: Forestry × End date: 2016 × Start date: 2016 ×
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    ThesisItemOpen Access
    Plus tree selection, progeny testing and reproductive biology of Khejri (Prosopis cineraria (L.) Druce)
    (CCSHAU, 2016) Preeti Singh; Bangarwa, K.S.
    The vital importance of Prosopis cineraria in present day context in terms of its multiple uses in general and lack of information on its genetic aspects especially reproductive biology, plus tree selection and progeny testing, promoted the present study. The study was conducted by collecting seeds from plus trees from areas around Bhiwani, Fatehabad, Bawal and Bhattu in Haryana based on the desirable characters of economic interest. The remaining part of this study comprised the investigation on phenology, floral biology and breeding systems were carried out on the trees growing at the field of Forestry department of CCS Haryana Agricultural University, Hisar during 2014-15. A considerable amount of variation for different morphological characters such as height, clear bole height, girth at breast height etc. was found among twenty one plus trees from Haryana. Ample genetic variation was also observed for field emergence, seedling height, basal diameter, root: shoot ratio etc. among the progenies of the selected plus trees. Among all the progenies, the progeny of PC11 from Bawal was found most outstanding followed by the progeny of PC8 from Fatehabad. Defoliation started during the month of November and continued till end of January. Initiation of leaf primordial was noticed during the last week of February at the terminal end of the branches. Panicle initiation started in the first week of March and continued till 2 nd of April. The floral buds started to open from first week of April to third week of April. The flowering pattern was asynchronous i.e. new flowers were developing at different times on the same tree. The trees were in full bloom from second week of April to third week of May. Maximum flower opening ranging from 84.38 to 93.82 per cent was recorded between 0800-0900 h. The shiny stigma a reflection of stigma receptivity occurred between 0800 to 1100 h. Khejri tree was found cross fertilizing in which percent pod set varied from 0 for selfing to 2.03 per cent for natural open pollination.
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    ThesisItemOpen Access
    Plus tree selection, progeny testing and reproductive biology of mahaneem (Ailanthus excelsa Roxb.)
    (CCSHAU, 2016) Daneva, Vijay; Dhillon, R.S.
    The vital importance of mahaneem in present day context in terms of its multiple uses in general and lack of information on its genetic aspects especially reproductive biology, plus tree selection and progeny testing promoted the present study. The investigation on phenology, floral biology and breeding system were carried out on the trees growing in campus of CCS HAU, Hisar. The remaining part of the study was conducted by collecting seeds from plus trees representing different eco-geographical regions of Haryana, Rajasthan and Gujarat on the basis of economically desirable traits. Mild defoliation started in mid of March and continued up to end of May. However, in young seedlings in nursery sever leaf fall was noticed during first week of March. In majority of trees, the leaves turned to yellowish brown colour during the first week of March followed by light to moderate defoliation. However, rigorous leaf fall was observed in May and bulk of defoliation occurred from May 13-28. There was complete defoliation before the initiation of new vegetative growth and the new leaves started coming up after all the leaves had shed off. After 3-4 days of leaf bud emergence, new leaves light green in colour arose and within one week these new leaves turned into dark green colour. The leaves attained their full size in about three weeks. The floral buds started to open during last week of February. Peak period of flowering varied from 9-13 days. Maximum flower opening ranging from 85.71 to 92.85 per cent was recorded between 0800-0900 h. The flowering pattern showed a low rate initially during last week of February, gradually increasing to peak during first fortnight of March, followed by cessation from second fortnight of March. The period of fruit development and maturity ranged from 63 - 74 days. The fruit maturity was observed from the last week of May to first fortnight of June. Duration of panicle initiation to fruit maturity varied from 132 to 140 days. Pollen stainability was 85.58 to 91.49 per cent. The average pod setting of 12.60 per cent was recorded under open pollination which ranged from 8.51 to 19.05 per cent on different trees. However, in selfing/bagging, pod setting varied from 0 to 10.39 per cent with a mean of 5.26. Pod setting under selfing and open pollination differ significantly, which form a strong evidence for facultative xenogamous/often cross pollination in mahaneem. A considerable amount of variation for different morphological characters such as height, clear bole height, girth at breast height etc. was found among twenty one diverse plus trees for morphological traits. Ample genetic variation was also observed for field emergence, seedling height, basal diameter, root length and number of branches among the progenies of the selected plus trees. Considering several desirable traits simultaneously, the progenies of plus trees AE19, AE17, AE21 and AE10 appeared promising than others under study. High heritability coupled with genetic advance was found in field emergence and seedling dry weight.