Record Details

Evaluation of Double Cross Derived Lines for Their Combining Ability of Fruit Yield and its Component Traits in Okra (Abelmoschus esculentus (L.) Moench)

KrishiKosh

View Archive Info
 
 
Field Value
 
Title Evaluation of Double Cross Derived Lines for Their Combining Ability of Fruit Yield and its Component Traits in Okra (Abelmoschus esculentus (L.) Moench)
 
Creator L. Malakannavar
 
Contributor G. Shanthakumar
 
Subject Genetics and Plant Breeding
 
Description Okra is an economically important vegetable crop, has good nutritional value
particularly vitamin C (30 mg/100 g), Ca (90 mg/100 g) and iron content (1.50 mg
/100 g) in edible fruit. An investigation was made to study magnitude of heterosis,
combining ability, path of productivity, heterotic grouping and the evaluation of
selected genotypes for disease resistance and iron content.
The F1?s were obtained by crossing the ten newly derived inbred lines in full
diallel design. Analysis of variance of parents was significant for fruit yield and yield
traits. Maximum standard heterosis of 79.59 per cent for fruit yield per hectare was
observed in cross 18 x 5, followed by 5 x 37 (67.38%) and 37 x 16 (56.33%) over
Pusa Sawani. The crosses like 4 x 5, 5 x 37, 6 x 37, 16 x 2, 22 x 6 and 12 x 6 had
maximum standard heterosis for traits like number of fruits per plant, 100-seed
weight, number of seeds per fruit, fruit length and number of branches per plant,
respectively.
The GCA and SCA ratio variance was less than unity for all characters
indicating predominance of non-additive variance. Lines 4, 5, 37, and 22 categorized
as good general combiners. The crosses 6 x 16, 4 x 37, 13 x 18 were identified as best
specific combiners for all traits studied.
Path of productivity indicated fruit weight and number of fruits per plant have
maximum contribution to yield and double cross predicted per se performance aids in
the heterotic grouping i.e., the lines 4 and 13 belong to same group and lines 37 and
18 belong to another group. The lines 4, 6, 13 and 16 showed multiple disease
resistance for yellow vein mosaic virus, powdery mildew and alternaria leaf spot
diseases and cross combination of 4 x 22, 4 x 5 yielded higher iron content. Best
Cross 5 x 37 had Fe (1.30 mg/100 g), moderately resistant to alternaria leaf spot and
resistant to powdery mildew.
 
Date 2016-11-10T16:25:05Z
2016-11-10T16:25:05Z
2011
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/84955
 
Format application/pdf
 
Publisher UAS, Dharwad