CROSSABILITY STUDIES IN Bauhinia SPECIES
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Date
2021-06
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UHF,NAUNI
Abstract
ABSTRACT
The present investigations entitled “Crossability studies in Bauhinia species” was
carried out in the Department of Tree Improvement and Genetic Resources, Dr Y. S. Parmar
University of Horticulture and Forestry Nauni, Solan (H.P.) during the year 2018-2020. The
plant materials of 9 genotypes (5 Lines, V1toV5 × 4 Testers, P1toP4) were subjected to
controlled crossing. Seeds so obtained were sown in polybags to raise and evaluate the
progeny seedlings under CRD. Maximum fruit set of 47.01 percent was recorded from V2×P2
Signature of the Student Signature of Major Advisor
Countersigned
Professor and Head
Department of Tree Improvement and Genetic Resources
Dr. Y. S. Parmar University of Horticulture and Forestry
Nauni-173 230, Solan (H.P.)
whereas the lesser fruit set of 25.33 percent was registered by the cross combinations V3×P3,
V5×P2, V5×P3. Regarding the seed germination maximum percentage (70.61) was obtained
from V1×P1 cross. The hybrid seedlings of V4×P1 have been found to perform better
consistently from the age of three months up to one year for growth characters namely height
and collar diameter. The progenies of V4×P4, V4×P2 and V2×P4 have also performed well for
the nursery stage growth characters. The general combining ability in relation to progeny
performance revealed that line V4 followed by V3 has maximum positive effect for seedling
growth parameters whereas testers P3, P4 and P2 were found to be good combiners. The
genotypes of the crosses V1×P4 and V4×P1 were found to be the best for their specific
combining abilities (SCA) in accordance with the juvenile growth of their hybrids. However
non significant positive SCA was recorded for collar diameter, leaf area and number of
leaves. High heritability with genetic advance was found for seedling height and leaf area
suggesting that these characters can be good indicators for juvenile selection. The hybridity
of plants was successfully confirmed at molecular level using six RAPD primers (OPL 08,
OPA 16, OPO 17, OPC 08, OPF 15 and OPS 03).