Inheritance of SSR and SNP loci in an oil palm interspecific hybrid backcross (BC2) population

Musa B., . and Mohamad Omar, . and Ismanizan Ismail, . and Nookiah Rajanaidu, . and Ting N. C., . and Rajinder Singh, . and Zulkifli Yaakub, . and Mohd Din A., . and Kushairi A., . Inheritance of SSR and SNP loci in an oil palm interspecific hybrid backcross (BC2) population. pp. 203-213. ISSN 1511-2780

The oil palm species Elaeis oleifera although it produces lower oil yield than its African counterpart Elaeis guineensis does possess certain unique traits that are of interest to breeders. E. oleifera has slower annual height increment higher level of carotenoids and unsaturated fatty acids. A number of interspecific hybrid crossing programmes have been initiated to introgress the unique characteristics of E. oleifera into high yielding planting materials. As such an appropriate backcross interspecific hybrid population (BC2) could be used to develop genetic maps and identify quantitative trait loci (QTL) linked to traits of interest which will be potentially helpful in reducing the number of breeding cycles. The objective of this study was to determine the heritability of SSR and SNP loci in oil palm. Seventy-five palms from a BC2 population were selected as the mapping population. A total of 4966 (4451 SNP and 515 SSR) markers were screened and 2135 (43) were polymorphic and mostly contributed by the female parent. The level of polymorphism exhibited by the BC2 population was similar for both marker systems. Genotyping results revealed a sufficient number of co-dominant polymorphic markers that are important in genetic mapping studies. Chi-square test showed that 87.6 of the markers were in accordance to the expected Mendelian segregation ratios. The results indicated that they are stably inherited and suitable for genetic mapping studies and also have proven to be useful as fingerprinting tools to assess the genetic purity in controlled crosses.

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Abstract

The oil palm species Elaeis oleifera although it produces lower oil yield than its African counterpart Elaeis guineensis does possess certain unique traits that are of interest to breeders. E. oleifera has slower annual height increment higher level of carotenoids and unsaturated fatty acids. A number of interspecific hybrid crossing programmes have been initiated to introgress the unique characteristics of E. oleifera into high yielding planting materials. As such an appropriate backcross interspecific hybrid population (BC2) could be used to develop genetic maps and identify quantitative trait loci (QTL) linked to traits of interest which will be potentially helpful in reducing the number of breeding cycles. The objective of this study was to determine the heritability of SSR and SNP loci in oil palm. Seventy-five palms from a BC2 population were selected as the mapping population. A total of 4966 (4451 SNP and 515 SSR) markers were screened and 2135 (43) were polymorphic and mostly contributed by the female parent. The level of polymorphism exhibited by the BC2 population was similar for both marker systems. Genotyping results revealed a sufficient number of co-dominant polymorphic markers that are important in genetic mapping studies. Chi-square test showed that 87.6 of the markers were in accordance to the expected Mendelian segregation ratios. The results indicated that they are stably inherited and suitable for genetic mapping studies and also have proven to be useful as fingerprinting tools to assess the genetic purity in controlled crosses.

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Item Type:	Article
AGROVOC Term:	Oil palm
AGROVOC Term:	Genetic inheritance
AGROVOC Term:	Backcrossing
AGROVOC Term:	Hybrids
AGROVOC Term:	Elaeis oleifera
AGROVOC Term:	Oil crops
AGROVOC Term:	Crop yield
AGROVOC Term:	Elaeis guineensis
AGROVOC Term:	Plant breeders
AGROVOC Term:	Height
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 06:29
URI:	http://webagris.upm.edu.my/id/eprint/24614

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