Abstract
In India, among nonedible oilseed crops, linseed is a commercial crop having tremendous economic and industrial importance. The seed production is low due to limited resources, so the development of high-yielding lines with desirable characters is urgently needed. In the present study seven parents' half diallel data was subjected to biplot analysis to identify the heterotic crosses, genetically similar parents, and to study their interrelationship. Parent Sln-Ys with A-79 and A-03 with A-79 for capsules per plant and seed yield, parent Mukta with Sln-Ys and Mukta with BAU-45 for seeds per capsule, and parents Mukta, A-103, A-79 and A-94 for test weight had lowest correlation. Parent B [Mukta] and F [A-79] were good general combiner for all the traits. The crosses F [A-79] × A [Sln-Ys] and D [A-03] × F [A-79] for capsules per plant, test weight and seed yield per plant, cross D [A-03] × A [Sln-Ys] for capsules per plant and test weight and cross D [A-03] × F [A-79] for test weight and seed yield per plant were heterotic. None of the crosses were heterotic for seeds per capsule.
Highlights
In terms of production and value, oilseed crops are second major agriculture crops next to food grains in India
The material for the present study comprised of seven pure and homozygous lines namely, a yellow-seeded selection Sln-Ys (Parent A) and six other high-yielding varieties, namely, Mukta (Parent B), A-103 (Parent C), A-03 (Parent D), BAU-45 (Parent E), A-79 (Parent F), and A-94 (Parent G) of linseed (Linum usitatissimum L.) which were crossed in diallel fashion excluding reciprocals to get F1 seeds in year 2005-2006
Hybrids had greater mean sum of square (MSS) than parents for all the traits which suggested that significant heterosis existed in the hybrids (Table 2)
Summary
In terms of production and value, oilseed crops are second major agriculture crops next to food grains in India. Plant breeders use Griffing’s [10] diallel mating design to identify desirable parents along with their specific cross-combinations and to get the knowledge of genetic effects, estimates of general combining ability (GCA), specific combining ability (SCA) and variance components [11,12,13,14,15] It provides information about inheritance of important traits, identification of promising heterotic combinations, and heterotic patterns based on partitioning of total variance into GCA and SCA [16]. The present study was undertaken for the first time to analyze diallel data using GGE biplot model to gather information about genetic interrelationships among parents and identification of heterotic combinations for high seed yield in linseed
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