Please use this identifier to cite or link to this item: http://krishikosh.egranth.ac.in/handle/1/5810055943
Authors: SOWMYA H. H.
Advisor: Dr. KAMATAR M Y
Title: STABILITY ANALYSIS OF NEWLY DEVELOPED SINGLE CROSS HYBRIDS OF MAIZE (Zea mays L.)
Publisher: University of Agricultural Sciences Dharwad
Language: en
Type: Thesis
Pages: 157
Agrotags: null
Keywords: STABILITY ANALYSIS OF NEWLY DEVELOPED SINGLE CROSS HYBRIDS OF MAIZE (Zea mays L.)
Abstract: An investigation was undertaken on seventeen single cross hybrids of maize to assess the relationship between the yield and yield attributing traits and to identify high yielding and stable hybrids for summer, monsoon and across the locations and seasons. The stability performance of test hybrids was estimated at two seasons viz., summer of 2014 and monsoon of 2014 and three locations viz., MARS, Dharwad, ARS, Sankeshwar and ARS, Nipani. The results revealed significant hybrid × environment interaction indicating differential performance of maize hybrids across different locations/environments. In the association studies, grain yield showed positive correlation with cob length, cob diameter, kernels per row, cob weight and test weight and negative association was observed with plant height, days to anthesis, days to silking and days to brown husking. Hence, selection based on these traits would be needed for improvement of grain yield. Path analysis indicated that cob weight, shelling percent, plant height, kernels per row, days to silking exerted high direct effect on grain yield. Therefore, these traits can be considered as principal yield contributing components and it is suggested to use these as selection criteria for grain yield improvement in maize. In conclusion, we can suggest indirect selection in early generations via traits that have the highest direct effect on dependent variables. On the basis of stability parameters, the single cross hybrids DMH 100-1, DMH 100-2, DMH 100-4, DMH 100-8, DMH 100-12 and DMH 100-16 were promising for majority of characters studied with high mean performance across the locations during summer. The hybrids, DMH 100-1, DMH 100-2, DMH 100-12 and DMH 100-14 were identified as stable over the locations during monsoon. The hybrids, DMH 100-1, DMH 100-2 and DMH 100-14 were not influenced much by the season/environment and stable across the locations and seasons.
Subject: Genetics and Plant Breeding
Theme: STABILITY ANALYSIS OF NEWLY DEVELOPED SINGLE CROSS HYBRIDS OF MAIZE (Zea mays L.)
These Type: M.Sc
Issue Date: 2015-06
Appears in Collections:Thesis

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