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Studies on floral biology and breeding behaviour of sweet orange (Citrus sinensis (L.) Osbeck.)

KrishiKosh

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Title Studies on floral biology and breeding behaviour of sweet orange (Citrus sinensis (L.) Osbeck.)
 
Creator Kumatkar, Raghunath Bhimrao
 
Contributor Godara, A. K.
 
Subject fruits, biological phenomena, animal developmental stages, environmental degradation, attractants, bactrocera cucurbitae, biological interaction, sexual reproduction, precipitation, eggs
 
Description The present experiment was conducted to study the floral biology and breeding
behaviour of sweet orange cultivars viz., Pineapple, Blood Red, Jaffa and Mosambi. In sweet
orange flowering takes place only once in year i.e. February–March under North Indian
conditions. The duration of floral bud development was 19-23 days in different cultivars Jaffa
was earliest to start flowering. The duration of flowering was 20-23 days in the cultivars.
These cultivars came to full bloom in last week of February to first week of March. Two type
of inflorescence were observed i.e. leafy and leafless. The flowers were borne on current
season’s growth in the axils of leaves either solitary or in cymes of three to eight. Flower
structure observed in sweet orange with five sepals, five petals and twenty stamens with
superior ovary. The maximum opening of flowers and dehiscence of anthers took place in
morning hours (10.00 A.M. to 12.00 noon) in all the cultivars. Stigma became receptive just
after anthesis and remained receptive till 72 hours of pollination in all the cultivars. The
maximum receptivity was recorded on the day of anthesis. The highest fruit set was recorded
in cultivar Jaffa under open pollination (32.84%) followed by self pollination (29.81%) and
lowest fruit set was recorded in cv. Blood Red.
 
Date 2016-09-15T11:16:39Z
2016-09-15T11:16:39Z
2014
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/76820
 
Language en
 
Format application/pdf
 
Publisher CCSHAU