STUDIES ON GENETIC ENHANCEMENT OF PRODUCTIVITY AND WILT RESISTANCE IN CHICKPEA (Cicer arietinum L.)
| dc.contributor.advisor | P.M. SALIMATH | |
| dc.contributor.author | H. G. NIJAGUN | |
| dc.date.accessioned | 2019-06-11T11:44:23Z | |
| dc.date.available | 2019-06-11T11:44:23Z | |
| dc.date.issued | 2007-01-04 | |
| dc.description.abstract | Chickpea with very low productivity is constrained by biotic and abiotic factors. Wilt caused by Fusarium oxysporum fsp ciceri results in significant yield losses. With the objective of combining productivity and resistance to wilt, the present study used two different breeding approaches viz., mutation following hybridization and biparental mating in a carefully planned cross Bheema x ICCV-10. Additionally, an innovative method of pollen based screening (pollen bioassay) for wilt resistance was adopted to enhance selection efficiency for wilt resistance. Pollen bioassay is easy and cost effective alternative to molecular markers and wilt sick plot screening (sporophytic assay). Mutations created better segregating population for productivity and its three important related characters. The BIP population was comparable to F3. Biparental mating and also irradiation shifted the nature of association towards a favorable side. Pods/plant and seed weight was positively and significantly correlated in F3M2 and Bheema M3 populations. Principal component analysis also indicated significant shift in the variation pattern in mutated populations. The proportion of transgressive segregants was highest in F3M2 followed by Bheema M3, F3SSD, BIP and F3 populations. So the hypothesis that mutation following hybridization proved to be true and useful in generating productive segregating population. In this study, resistant, susceptible parents and their combination (Fi) could be easily differentiated on the basis of pollen tube growth under the influence of Fusarium pathotoxin. The families identified as resistant/susceptible based on pollen bioassay behaved similarly during phenotypic assay also. Thus, pollen bioassay technique can be used as a co-dominant marker for selection of wilt resistance in chickpea. With hands on setting, one could screen at least 60-80 samples per day. Therefore, Pollen assisted selection is considered to be a nqteworthy and promising future technology that can help accelerate the breeding efficiency in not only chickpea but also in different crop species. | en_US |
| dc.identifier.other | TH-8398 | |
| dc.identifier.uri | http://krishikosh.egranth.ac.in/handle/1/5810108073 | |
| dc.language.iso | en | en_US |
| dc.pages | 182 | en_US |
| dc.publisher | University of Agricultural Sciences GKVK, Banglore | en_US |
| dc.sub | Genetics and Plant Breeding | en_US |
| dc.subject | null | en_US |
| dc.theme | STUDIES ON GENETIC ENHANCEMENT OF PRODUCTIVITY AND WILT RESISTANCE IN CHICKPEA (Cicer arietinum L.) | en_US |
| dc.these.type | Ph.D | en_US |
| dc.title | STUDIES ON GENETIC ENHANCEMENT OF PRODUCTIVITY AND WILT RESISTANCE IN CHICKPEA (Cicer arietinum L.) | en_US |
| dc.type | Thesis | en_US |